1977 Gmc Sierra problems
The Chevrolet Silverado is a range of trucks manufactured by General Motors under the Chevrolet brand. Introduced for the 1999 model year, the Silverado is the successor to the long-running Chevrolet C/K model line. Taking its name from the top trim level from the Chevrolet C/K series, the Silverado is offered as a series of full-size pickup trucks, chassis cab trucks, and medium-duty trucks. The fourth generation of the model line was introduced for the 2019 model year.
The Chevrolet Silverado shares mechanical commonality with the identically related GMC Sierra; GMC ended the use of the C/K nomenclature a model generation prior to Chevrolet. In Mexico, high-trim level versions of the Silverado use the Chevrolet Cheyenne name (not to be confused with the 2003 concept). Competing against the Ford F-Series, Ram Pickup, Toyota Tundra, and Nissan Titan, the Silverado is among the best-selling vehicles in the United States, having sold over 12 million trucks since its introduction in 1998 as a 1999 model year.
History
The Silverado nameplate made its debut for the 1975 model year, becoming the top trim level on all Chevrolet C/K trucks, slotted above Custom Deluxe, Scottsdale, and Cheyenne. For the 1968 model year (seven years before the Silverado), GMC C/K trucks used variations of the Sierra name (Sierra, Sierra Classic, Sierra Grande, and High Sierra). Even after the C/K series officially ended, GM still uses the CK and the CC in their current model codes, to denote a two-wheel drive (CC), and four-wheel drive (CK).
For the 1988 GMT400 model architecture, Chevrolet retained the C/K model nomenclature, with GMC branding its full-size line as Sierras. While sharing the same body and chassis, the model chronology of the Silverado and Sierra are different, with five generations of the Sierra, while four of the Silverado.
In 2018, at the NTEA Work Truck Show in Indianapolis, Indiana, Chevrolet unveiled the first medium-duty Silverado, expanding the model line to a 4500HD, 5500HD, and 6500HD chassis cab. Largely the successor to the 2003–2009 GMT560 chassis, the medium-duty trucks are exclusive to Chevrolet, with no plans for an equivalent GMC version. Instead, Navistar International (now partnering with GM) would sell the medium-duty trucks as a rebadged counterpart, called the CV. This is in fact a very similar nod to how the Avalanche did not have a GMC Yukon–based equivalent, but instead, Cadillac would take its place as the former's rebadged counterpart, the Escalade EXT.
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Common 1977 Gmc Sierra problems
The GMC Sierra 1977 is known for several common problems that owners have reported over the years. Here are some of the most significant issues:
- Rusting: The 1977 GMC Sierra is known for its susceptibility to rusting, especially in the lower rear section of the front fenders and above the wheelwells on Fleetside trucks. This issue can be attributed to the use of inadequate primers, zinc galvanized plating, and lighter-gauge sheetmetal in the early square-body trucks. Rusting can significantly weaken the truck's structure, leading to safety concerns and costly repairs.
- Fuel tank defect: The 1973-1987 Chevy C10 trucks, including the 1977 GMC Sierra, were equipped with a sidesaddle gas tank design, which was prone to leakage and fire hazards. A good solution to this problem is to convert to a rear-mounted Classic Performance Products tank or a fuel cell.
- Faulty carburetors: The 1977 GMC Sierra's carburetors are known to cause starting problems, especially when the engine is cold. One owner reported that their truck required several pumps of the gas pedal to start, and if they touched the gas pedal too soon after starting, the engine would die. This issue can be attributed to a faulty carburetor adjustment, air leak, or a dirty fuel filter.
- Idling problems: Some owners have reported that their 1977 GMC Sierra won't idle when warm, and it even dies when put in gear. This issue can be due to a faulty carburetor, a vacuum leak, or a malfunctioning idle air control valve.
In summary, the 1977 GMC Sierra is known for several common problems, including starting difficulties, rusting, fuel tank defects, faulty carburetors, and idling problems. These issues can be attributed to various factors, such as faulty sensors, worn-out parts, and inadequate primers. Owners of the 1977 GMC Sierra should be aware of these issues and take necessary precautions to prevent them from occurring or address them promptly if they do.
1977 Gmc Sierra car problems categorized by type of issue
After analyzing all complaints sent to the NHTSA and researching popular Gmc Sierra problems, we found that the most common problems with these 2023 model year vehicles are:
- Tires problems
- Service brakes problems
- Hydraulic problems
- Fuel system problems
- Gasoline problems
The graph below shows statistics for all 1977 Gmc Sierra vehicle components and the number of complaints received.
1977 Gmc Sierra complaints
The NHTSA has received 3 complaints about various vehicle components related to the 1977 Gmc Sierra.
SERVICE BRAKES, HYDRAULIC,FUEL SYSTEM, GASOLINE PROBLEM
- Date Of Incident: 2003-03-15
- VIN: TCL247J5162
- Components: SERVICE BRAKES, HYDRAULIC,FUEL SYSTEM, GASOLINE
- Summary: GAS LINE OF SADDLE TANK LEAKED, FUEL PUMP WENT OUT,DISPURSED GAS WHILE DRIVING,LUCKILY SMELLED GAS,IMMEDIATLY PULLED OVER, SHUT MOTOR DOWN,ALSO BRAKES FAILED, HAD TO REPLACE MASTER CYLINDER. WANT ALSO TO KNOW ABOUT CLASS ACTIN SUIT ON SADDLE TANK'S, WANT TO KNOW IF I'M ENTITLED TO A CONSUMER CERTIFICATE FROM GM
TIRES PROBLEM
- Date Of Incident: 2001-05-10
- Number Of Injuries: 1
- VIN: TKL24725085
- Components: TIRES
- Summary: BRIDGESTONE DULLER 684 TIRE, 31X10.5165, DOT#: EJCWCFH207, WHILE DRIVING 55-65 MPH THE LEFT FRONT TIRE BELWOUT, CAUSING CONSUMER TO LOOSE CONTROL OF VEHICLE.*AK THERE WERE MINOR INJURIES. *SLC
TIRES PROBLEM
- Date Of Incident: 2001-05-10
- Number Of Injuries: 1
- VIN: TKL24725085
- Components: TIRES
- Summary: BRIDGESTONE DULLER 684 TIRE, 31X10.5165, DOT#: EJCWCFH207, WHILE DRIVING 55-65 MPH THE LEFT FRONT TIRE BELWOUT, CAUSING CONSUMER TO LOOSE CONTROL OF VEHICLE.*AK THERE WERE MINOR INJURIES. *SLC
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