Chevrolet Impala problems
The Chevrolet Impala (/ɪmˈpælə, -ˈpɑːlə/) is a full-size car that was built by Chevrolet for model years 1958 to 1985, 1994 to 1996, and 2000 to 2020. The Impala was Chevrolet's popular flagship passenger car and was among the better-selling American-made automobiles in the United States.
For its debut in 1958, the Impala was distinguished from other models by its symmetrical triple taillights. The Chevrolet Caprice was introduced as a top-line Impala Sport Sedan for model year 1965, later becoming a separate series positioned above the Impala in 1966, which, in turn, remained above the Chevrolet Bel Air and the Chevrolet Biscayne. The Impala continued as Chevrolet's most popular full-sized model through the mid-1980s. Between 1994 and 1996, the Impala was revised as a 5.7-liter V8–powered version of the Chevrolet Caprice Classic sedan.
In 2000, the Impala was reintroduced again as a mainstream front-wheel drive car. In February 2014, the 2014 Impala ranked No. 1 among Affordable Large Cars in U.S. News & World Report's rankings. When the 10th generation of the Impala was introduced for the 2014 model year, the 9th generation was rebadged as the Impala Limited and sold only to fleet customers through 2016. During that time, both versions were sold in the United States and Canada. The 10th-generation Impala was also sold in the Middle East and South Korea.
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Chevrolet Impala model years
Common Chevrolet Impala problems
The Chevrolet Impala has been a popular choice for many drivers, but like any vehicle, it is not without its common problems. One of the most frequently reported issues is transmission failure, which has been reported in some units of the 2011 Chevy Impala, as well as some 2005 and 2006 models. Owners have reported hearing a loud noise from the transmission before it failed, as well as stuttering and jerking as their vehicles slowed down. This issue can be costly to repair, with repair work potentially costing up to $2,970.
Another common problem reported by Impala owners is power lock problems, which have been reported in some units of the 2008 Chevy Impala. The locks may work intermittently or fail to operate completely. Replacing faulty components like the lock assembly, actuator, or sensor appeared to solve the issue in most affected vehicles.
Heater issues have also been reported in some units of the 2007 Chevrolet Impala. One owner said his heater suddenly stopped working because of clogged lines. Mechanics speculate that low-quality antifreeze may have caused the issue. Several owners also noticed cold air blowing from the heater vents while their vehicles were on idle. There are many possible causes for heater malfunction, including a faulty thermostat or head gasket leak.
Passlock problems have been reported in some units of the 2002 Impala. Owners were upset about getting locked out of their vehicle, their car not starting, and the security light being on.
In addition to these issues, some 2006 Impala owners have had problems with their engine's excessive oil consumption. Drivers report not noticing any visible oil leaks, which suggests that the engine was burning it. Replacing the oil pan is a common fix for this issue.
The headlights of Chevy Impalas manufactured after 2014 have also been reported as a common problem. In a design overhaul, General Motors attempted to improve its lights. However, these changes shortened the distance they cover, decreasing the overall visibility they provide. These designs also don't allow for proper ventilation, which allows condensation to build up. Too much condensation can cloud the housing unit, further reducing your headlights' performance.
These are just a few of the common problems reported by Chevrolet Impala owners. While these issues can be frustrating, it is important to note that many Impala owners have reported positive experiences with their vehicles. Regular maintenance and addressing issues as they arise can help ensure a longer lifespan for your Impala.
What is the common problem with Chevy Impala?
Some of the most common complaints about the Chevrolet Impala include transmission failure, power lock problems, heater issues, and excessive oil consumption.
Is the Chevy Impala a reliable car?
In fact, Impalas rank as the 5th most reliable vehicle out of 12 in its class, according to RepairPal. Some later model-year Impalas may still benefit from Chevy's original factory warranty, which provides three years/36,000 miles of bumper-to-bumper coverage or five years/60,000 miles of powertrain protection.
What year is bad for Chevy Impala?
On average, you should try to stay away from used Chevy Impalas that were built before 2013. Indeed, the ninth generation Impala's first three years of production from 2006-2008 were the least reliable years of this vehicle. However, other less reliable model years of the Chevrolet Impala include: 2009 Chevrolet Impala.
What year did Impala have transmission problems?
Transmission. Many early 2000s Chevy Impala transmissions are known to fail as they approach 100,000 miles. Drivers have reported heavy jerking and hesitation accompanied with loud noises before their transmission failed completely.
Percentage distribution of complaints by Chevrolet Impala years
We have researched Chevrolet problems and analysed all the complaints filed against Chevrolet Impala cars and compiled the top 5 most problematic Chevrolet Impala model years:
- Chevrolet Impala 2004
- Chevrolet Impala 2000
- Chevrolet Impala 2009
- Chevrolet Impala 2008
- Chevrolet Impala 2002
Below you can see the percentage distribution of known problems by Chevrolet Impala model years.
Distribution of the number of complaints by Chevrolet Impala years
We've also compiled a chart for you with the number of complaints about Volkswagen Jetta cars of certain model years:
Chevrolet Impala car problems categorized by type of issue
After analysing all complaints related to Chevrolet Impala , it was concluded that the most common issues with these cars are:
- Electrical system problems
- Engine problems
- Steering problems
- Air bags problems
- Service brakes problems
The graph below shows statistics for all Chevrolet Impala vehicle components and the number of complaints received.
Distribution of the number of complaints where the accident occurred by Impala model years
A total of 567 complaints were registered in which the accident occurred. In the graph you can see the distribution of the number of complaints by model year.
Distribution of the number of complaints with fire by Impala model years
There were a total of 332 complaints that resulted in a fire. In the graph you can see the distribution of the number of complaints by model year.
Distribution of the number of complaints with injuries by Impala model years
There were a total of 526 complaints that resulted in a injuries. In the graph you can see the distribution of the number of complaints by model year.
Distribution of the number of complaints with deaths by Impala model years
There were a total of 8 complaints that resulted in a death. In the graph you can see the distribution of the number of complaints by model year.
The NHTSA has received 10442 complaints about various vehicle components related to the Chevrolet Impala . Below are the 25 most recent complaints reported for Chevrolet Impala vehicles.
Latest 25 complaints
Chevrolet Impala 2009
- Date Of Incident: 2024-09-17
- Date Complaint: 2024-10-20
- Number Of Injuries: 2
- Crash: 1
- VIN: 2G1WB57N691
- Components: POWER TRAIN
- Summary: A piece broke off and had fallen off of transmission when stopped at a redlight when put in gear car didn't want to move had to manually shift to get off the road and towed it home. The piece that broke fell into pan when changing transmission fluid. Believe it's off flywheel possibly forward band.
Chevrolet Impala 2010
- Date Of Incident: 2024-10-18
- Date Complaint: 2024-10-18
- VIN: 2G1WB5EN0A1
- Components: VEHICLE SPEED CONTROL,UNKNOWN OR OTHER,ENGINE
- Summary: I started my vehicle in the morning to let it warm up. I come back out to get myself and my son in the vehicle to go to work and take him to school. My dash upon entry had a check engine light on, and the message it displayed was "engine power reduced." I put my car into reverse, having no choice but to drive it and the traction control went out. My father in law pulled the code and it said something about the accelerator sensor. This is a known issue and recall in other models and I wanted to report it is also happening in my model.
Chevrolet Impala 2019
- Date Of Incident: 2022-06-15
- Date Complaint: 2024-10-13
- VIN: 2G11Z5SA9K9
- Components: SUSPENSION,UNKNOWN OR OTHER,ENGINE
- Summary: Several different instances I've had my parking brake release as soon as I go to move after being parked for a long period of time. (I never set my parking brake to begin with so I don't understand why it keeps telling me it's released) Once it tells me it's been released, it's followed by a rough jersey of the car and then I'm able to move. Ever since I bought the car, there was a small shake. The dealer had to cover the front strut assemblies that were going out at the time of purchase; but since then the shake is unbelievable. I've put tires on, checked all parts of the chassis, and don't see any visible defects that would cause the shake. They have no answers or ideas of how to fix it for me. The faux metal ring around the cupholders on the center console has been cracking since the date of purchase and it finally caught on a cup and broke and has cut myself and my child several times. I had to end up ripping the trim off just to be able to use the cupholders. Lastly, the car seems like it's not gaining enough power sometimes. I keep up on services and general maintenance, and nothing seems to help. It sounds like the exhaust is leaking, and again, there are no visible defects when looking under the car.
Chevrolet Impala 2019
- Date Of Incident: 2024-09-01
- Date Complaint: 2024-10-10
- VIN: 1G11Z5SA0KU
- Components: POWER TRAIN
- Summary: The contact owns a 2019 Chevrolet Impala. The contact stated that after parking the vehicle, the message “Shift to Park” was displayed; however, the transmission was already shifted to park(P). The vehicle was unable to turn off. The contact disconnected the battery to turn off the vehicle and reconnected the battery to restart the vehicle. The failure occurred several times. The vehicle was taken to the dealer, and the contact was referred to the manufacturer. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The failure mileage was 104,170.
Chevrolet Impala 2018
- Date Of Incident: 2024-10-01
- Date Complaint: 2024-10-01
- VIN: 2G1105S39J9
- Components: POWER TRAIN
- Summary: Since vehicle purchase in 2018 there is a shifting problem with the transmission. I have paid for shifter repairs and still the problem exist. While driving the car gets stuck in gear and hard to accelerate. The issue happens at various times without warning. There has been two instances that could have led to potential accidents. Upon spraking with and researching other impala owners, this is a common problem in the 3.6 engine Chevrolet Impalas but nothing has been done. The dealer has a plan to determine but it has always cost $1500+ to the customer.
Chevrolet Impala 2020
- Date Of Incident: 2024-08-22
- Date Complaint: 2024-09-21
- VIN: 1G11Z5S36LU
- Components: UNKNOWN OR OTHER,VISIBILITY/WIPER
- Summary: The back window is leaking and water is getting all on my trunk and ruining my items. Ford did not do a good job of sealing the windows.
Chevrolet Impala 2020
- Date Of Incident: 2024-08-29
- Date Complaint: 2024-09-19
- VIN: 1G11Z5S37LU
- Components: UNKNOWN OR OTHER,ENGINE,FUEL/PROPULSION SYSTEM
- Summary: I was driving down the highway in anchorage ak I heard a loud bang like a gunshot , when the vehicle was inspected I was told basically Evap, fuel system , fans , electrical , Cadillac converter exploded was the loud bang ! Serious issues have caused the vehicle to be inoperable !
Chevrolet Impala 2017
- Date Of Incident: 2020-07-07
- Date Complaint: 2024-09-16
- VIN: 2G1105S38H9
- Components: ELECTRICAL SYSTEM,UNKNOWN OR OTHER
- Summary: I have had this car for a few years and the evaporator core has failed, the car will blow air but it is very VERY hot air. The faulty evaporator core is a direct result of GM using cheaply made parts not inspected to the standard prior to installation into the vehicle. having previously owned this car in Hawaii and still owning it in a hot climate, the interior temperature exceeds well over 150 degrees Fahrenheit. This presents a serious safety hazard due to the potential for heat stroke, heat exhaustion and heat cramps which can effect the ability of the driver to control the vehicle appropriately. Children in the back seat, the elderly and even competent adults ARE AT RISK. NO ONE should be expected to pay to repair a safety hazard that GM has known about and ignored other than a bulletin the left many owners without a repair. This issue is clearly a serious safety concern and should be handled appropriately by GM.
Chevrolet Impala 2013
- Date Of Incident: 2024-07-06
- Date Complaint: 2024-09-15
- VIN: 2G1WG5E35D1
- Components: UNKNOWN OR OTHER,FORWARD COLLISION AVOIDANCE
- Summary: Service Stabilitrak traction light comes on and front left side on car makes noise when turn sterring wheel to left and ABS light comes on when this light comes on.
Chevrolet Impala 2014
- Date Of Incident: 2018-09-11
- Date Complaint: 2024-09-11
- VIN: 2G1WB5E30E1
- Components: ENGINE
- Summary: The contact owns a 2014 Chevrolet Impala. The contact stated while driving at an undisclosed speed, the contact became aware of an abnormal ticking sound coming from the vehicle. The vehicle was taken to the dealer where it was diagnosed with a failed actuator. The contact was informed that the actuator needed to be replaced. The vehicle was being repaired. The contact stated that a total of eleven actuators had been replaced in the vehicle since 2018. The manufacturer was not made aware of the failure. The failure mileage was approximately 122,000.
Chevrolet Impala 2003
- Date Of Incident: 2024-04-03
- Date Complaint: 2024-09-10
- VIN: 2G1WH52K039
- Components: EXTERIOR LIGHTING
- Summary: After I go back and forth between my bright headlights and regular All of a sudden my headlights shut off it happens after so many times going between them
Chevrolet Impala 2011
- Date Of Incident: 2024-08-19
- Date Complaint: 2024-08-31
- VIN: 2G1WC5EM4B1
- Components: VEHICLE SPEED CONTROL
- Summary: After getting into my parked car and starting it, the Stabilitrak warning message came on my display. This is the 2nd tike that this occurred. The first time it occured, my mechanic diagnosed it as a failed throttle body, which I replaced myself, (easy removal/installation). Now, a couple of months later, it occurred again. After doing some online research, it seems as though the position sensor on the accelerator pedal may be at fault. A lot, if not most cars today have a "fly-by-wire" system which replaces cables and such with sensors and motors. So, the accelerator, (gas), pedal controls the movement of the butterfly valve on the throttle body by sending a signal to the motor. I'm going to replace that... about $140 or so. I saw a YouTube video and the removal/installation is fairly easy. A lot of people are having this issue; maybe a recall is needed?
Chevrolet Impala 2018
- Date Of Incident: 2024-08-22
- Date Complaint: 2024-08-28
- VIN: 2G1125S39J
- Components: POWER TRAIN,VEHICLE SPEED CONTROL
- Summary: The contact owns a 2018 Chevrolet Impala. The contact stated while driving 45 MPH, the accelerator pedal was depressed but was inoperable. The contact stated that the vehicle failed to accelerate as intended. There was no warning light illuminated. The vehicle was taken to an independent mechanic and a dealer and was diagnosed with transmission failure. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 98,000.
Chevrolet Impala 2018
- Date Of Incident: 2024-08-24
- Date Complaint: 2024-08-27
- VIN: 2G11Z5SA1J9
- Components: TIRES
- Summary: The contact owns a 2018 Chevrolet Impala equipped with Goodyear Tires, Tire Line: Assurance, Tire Size: 235/50/R18, DOT Number: MT1PJBUR2920. The contact stated that while the vehicle was in for routine service, it was discovered that all four tires had severe tread separation and piling. The cause of the failure was not yet determined. The tires were not yet replaced. The manufacturer and local dealer were not contacted. The failure mileage was unknown.
Chevrolet Impala 2015
- Date Of Incident: 2024-08-22
- Date Complaint: 2024-08-22
- VIN: 2G1125S39F9
- Components: POWER TRAIN
- Summary: The contact owns a 2015 Chevrolet Impala. The contact stated while driving at an undisclosed speed, the vehicle downshifted and shuddered abnormally. There was no warning light illuminated. The vehicle was restarted; however, the failure recurred. The vehicle was taken to the dealer to be diagnosed. The contact was informed that the torque converter had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 171,000.
Latest 5 recalls Chevrolet Impala
The National Highway Traffic Safety Administration (NHTSA) has issued 111 recalls for different components of the Chevrolet Impala.You can explore the year of the Volkswagen Jetta you are interested in by selecting it from the list.
- Model: Chevrolet Impala 2018
- Report Received Date: 2018-08-30
- Manufacturer: General Motors LLC
- Components: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
- Summary: General Motors LLC (GM) is recalling certain 2018-2019 Chevrolet Equinox, Impala, Cruze, Volt and Bolt EV vehicles, GMC Terrain vehicles, Buick Lacrosse and Regal vehicles, Cadillac XTS and XTS Professional vehicles and 2018 Chevrolet Malibu vehicles. The rear brake caliper pistons may have an insufficient coating causing gas pockets to form, potentially reducing rear brake performance.
- Consequence: A reduction of braking performance can increase the risk of a crash.
- Remedy: GM will notify owners, and dealers will bleed the vehicle's brake system, free of charge. The recall began October 11, 2018. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 18279.
- Model: Chevrolet Impala 2019
- Report Received Date: 2018-08-30
- Manufacturer: General Motors LLC
- Components: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
- Summary: General Motors LLC (GM) is recalling certain 2018-2019 Chevrolet Equinox, Impala, Cruze, Volt and Bolt EV vehicles, GMC Terrain vehicles, Buick Lacrosse and Regal vehicles, Cadillac XTS and XTS Professional vehicles and 2018 Chevrolet Malibu vehicles. The rear brake caliper pistons may have an insufficient coating causing gas pockets to form, potentially reducing rear brake performance.
- Consequence: A reduction of braking performance can increase the risk of a crash.
- Remedy: GM will notify owners, and dealers will bleed the vehicle's brake system, free of charge. The recall began October 11, 2018. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 18279.
- Model: Chevrolet Impala 2009
- Report Received Date: 2016-07-05
- Manufacturer: General Motors LLC
- Components: AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION
- Summary: General Motors LLC (GM) is recalling certain model year 2009-2010 Chevrolet Impala vehicles manufactured April 25, 2008 through February 16, 2010. The front passenger seat frame may contact and damage the wires of the passenger presence sensor module.
- Consequence: If the wires are damaged, the passenger presence sensory system may fail to recognize that the passenger seat is occupied, disabling the air bag. Damage may also cause the air bag fuse to short resulting in a loss of all air bags and seat belt pretensions. Both conditions increase the risk of injury during a crash.
- Remedy: GM will notify owners, and dealers will double wrap the wires with anti-abrasion tape and replace damaged wires as necessary, free of charge. The recall began on August 1, 2016. Owners may contact Chevrolet customer service at 1-800-521-7300. GM's recall campaign number is 36110.
- Model: Chevrolet Impala 2010
- Report Received Date: 2016-07-05
- Manufacturer: General Motors LLC
- Components: AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION
- Summary: General Motors LLC (GM) is recalling certain model year 2009-2010 Chevrolet Impala vehicles manufactured April 25, 2008 through February 16, 2010. The front passenger seat frame may contact and damage the wires of the passenger presence sensor module.
- Consequence: If the wires are damaged, the passenger presence sensory system may fail to recognize that the passenger seat is occupied, disabling the air bag. Damage may also cause the air bag fuse to short resulting in a loss of all air bags and seat belt pretensions. Both conditions increase the risk of injury during a crash.
- Remedy: GM will notify owners, and dealers will double wrap the wires with anti-abrasion tape and replace damaged wires as necessary, free of charge. The recall began on August 1, 2016. Owners may contact Chevrolet customer service at 1-800-521-7300. GM's recall campaign number is 36110.
- Model: Chevrolet Impala 2002
- Report Received Date: 2015-10-26
- Manufacturer: General Motors LLC
- Components: ENGINE AND ENGINE COOLING:ENGINE
- Summary: General Motors LLC (GM) is recalling certain model year 1998-1999 Chevrolet Lumina and Oldsmobile Intrigue, 1997-2004 Buick Regal and Pontiac Grand Prix, 2000-2004 Chevrolet Impala, and 1998-2004 Chevrolet Monte Carlo vehicles. The affected vehicles were previously repaired under recalls 08V-118, 09V-116, and 15V-201 to address the possibility that engine oil may drip onto the hot exhaust manifold.
- Consequence: Engine oil that drips onto the hot surface of the exhaust manifold may result in a fire.
- Remedy: The remedy applied under recalls 08V-118, 09V-116, and 15V-201 did not adequately remove the safety risk. Under the improved remedy, dealers will replace the engines front valve cover and gasket. Vehicles that are covered by recalls 08V-118, 09V-116, or 15V-201 that have not yet received the original remedy will instead receive the improved remedy under the original recall number. The recall began on February 19, 2016. Owners may contact Chevrolet customer service at 1-800-222-1020, Buick customer service at 1-800-521-7300, Oldsmobile customer service at 1-800-442-6537 and Pontiac customer service at 1-800-458-8006. GM's number for this recall is 15757. Note: Until the improved remedy has been applied, owners are advised to park their vehicle outside since the fire risk exists even when the vehicle is unattended.
Latest negative Chevrolet Impala car reviews
Latest positive Chevrolet Impala car reviews
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Vehicle year: 2016
I'm glad to hear that you're enjoying your fourth Impala and that the technology is amazing. It's always exciting to learn new things about your car, even after owning it for a few years. While there are a few cons, such as some minor jerking in the transmission and a difficult-to-use gps/navigation system, I hope that Chevy will address these issues in the 2020 model. Thank you for sharing your experience with us!
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Vehicle year: 2004
I recently sold my beloved 04 Impala, which I had purchased used 2 years ago, to help out a family member. It was a tough decision, but I knew it was the right thing to do. While I loved the car, I did have one minor issue with the headlights. Although I had purchased brand new ones off of Amazon, they would occasionally shut off if the brights weren't clicked all the way. This was particularly scary when driving on dark, curvy roads with no street lights. Despite this, I still thought the car was great and it ran like a champ even with high miles.
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Vehicle year: 1996
A great car with intimidating looks and surprising jump off the line. The LT1 350 under the hood produces 260hp from the factory, with plenty of room to grow with simple performance upgrades. It's a head-turner at every light. I love my SS and I'm sure you will too!
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Vehicle year: 2018
I highly recommend purchasing the Premier version of the Impala. The larger engine and upscaled interior with leather, heated/cooled seats, and other features make it a great choice. The exterior is also enhanced with chrome trim and exhaust. The car has great acceleration and handling, and the comfort is top-notch. Road noise is minimal and all systems work as advertised. The Impala Premier matches up with much pricier competition in its class, feature by feature. It's a shame that Chevrolet has decided to stop producing this fine car due to the overall lack of demand for sedans of this size. Even after 4 years, my 2018 Impala Premier is still perfect in every area of consideration. No problems mechanically, electrically, nor electronically. All the electronic features are working flawlessly and the quality items like knobs and upholstery are still in like-new condition. I expect this car to last many, many years as dependable and comfortable transportation.
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Vehicle year: 2000
There is probably no other car available with the similar load of features in the same price range. It's great to have plenty of low end torque which helps you be in control. There's tons of space inside, and it's rated 5 stars for safety. It's also very economical in terms of gas usage, and there are many well thought out features. The trunk is huge and the seats are comfortable.
Are you having problems with your Chevrolet Impala?
Howell Sawayn 2025-08-22
Vehicle year: 2015
While the experience described is unfortunate, it is important to note that such incidents are rare and not representative of the overall quality of GM vehicles. It is worth considering that this may have been an isolated incident and not indicative of a larger issue. However, we understand the importance of dependability and strive to continuously improve our products to meet the highest standards. Thank you for bringing this to our attention.
Randall Schinner 2025-08-13
Vehicle year: 2001
I purchased this car used and it was in great condition. My wife used it for her daily 50-mile commute on easy roads. Unfortunately, after two years, the car started experiencing some issues. The transmission, alternator, air pump system, several solenoids, thermostat, and several sensors failed at around 70,000 miles. The latest issue is that the front bearing hubs are starting to fail. Fortunately, I was able to do most of the repairs myself. Although the car is comfortable and has heated seats, I have grown tired of fixing it and have decided to sell it. While it is an older car, the failures are inexcusable on a car with relatively low mileage that has had good care. We have owned several GM vehicles over the years, but this one was by far the least reliable and most expensive to own. Unfortunately, we will not be purchasing any more GM vehicles in the future. Update: The car was sold at a significant loss after I grew tired of spending every weekend doing repairs on it.
Candido Collier 2025-08-11
Vehicle year: 2010
My car's transmission failed at 67,000 miles, despite having only 45,000 miles when I purchased it. This is unacceptable.
Jules Crona 2025-08-09
Vehicle year: 2008
Firstly, it's worth noting that the engine is quite large, which can make accessing the spark plugs a bit of a challenge. Additionally, the sensors in each wheel hub assembly have a tendency to fail, and unfortunately, the entire wheel assembly needs to be replaced since the sensors are built in. The transmission can also experience issues with the pressure control solenoids. However, my main reason for writing this is that I recently experienced an issue with the AFM lifter, which unfortunately cannot be replaced without professional assistance due to the engine's sideways positioning. The cost of repair is quite high, and I am considering trading in the vehicle. Other issues I have encountered include difficulty starting due to a fuel pump electrical short, erratic shifting, inconsistent engine shake, failing wheel speed sensor which disables Traction Control, ABS, and StabiliTrak, ECM failure, and EVAP canister control circuit codes. All of these issues have occurred within the past 5 months, despite the car only having 140k miles on it.
Marty Daugherty 2025-08-08
Vehicle year: 2007
At around 75,000 miles, the 3.9L engine experienced a significant drop in fuel efficiency, from 29MPG to 23MPG, and began consuming oil at an alarming rate of 1 quart every 150 miles. Despite thorough inspection, no external leakage or mechanical issues were found with the engine, which otherwise runs perfectly. It is worth noting that GM has acknowledged the issue, but has not offered to cover the cost of repairs for this particular engine.