1999 Gmc C7500 problems

General information about Gmc-C7500
Overview of popular issues
Analysis of common problems
Сomplaints list
Recalls list

The Chevrolet Kodiak and GMC TopKick are a range of medium-duty trucks that were produced by the Chevrolet and GMC divisions of General Motors from 1980 to 2009. Introduced as a variant of the medium-duty C/K truck line, three generations were produced. Slotted between the C/K trucks and the GMC Brigadier Class 8 conventional, the Kodiak/TopKick were developed as a basis for vocationally oriented trucks, including cargo haulers, dump trucks, and similar vehicles; on later generations, both cutaway and cowled-chassis variants were produced for bus use.

Following years of declining market share, General Motors (in line with Ford Motor Company) sought to exit heavy-truck manufacturing. After struggling to enter joint ventures or sell the rights to its product line, the company ended production of the Kodiak and TopKick in 2009. The final medium-duty truck, a GMC TopKick 5500, rolled out of Flint Truck Assembly on July 31, 2009.

For the 2019 model year, after a ten-year hiatus, General Motors re-entered the conventional medium-duty truck segment. Developed in a joint venture with Navistar International, the Chevrolet Silverado 4500/5500 is a Class 4–6 vehicle. Slightly smaller than the Kodiak/Topkick, the Silverado 4500/5500 is marketed exclusively as a Chevrolet (with no GMC counterpart).

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Common 1999 Gmc C7500 problems

Based on the information provided in the sources, here are some common problems reported by owners of the GMC C7500 1999:

Injector Cable Wear: In some cases, worn-out injector cables have created shorts, leading to the truck cranking but not starting. Replacing these cables has resolved the stalling issue ().

Transmission Sensor and Oil Pressure Sensor: Issues with the transmission sensor going into limp mode or the oil pressure sensor have been reported. Checking and potentially replacing these sensors can address stalling or running problems ().

Idle and Performance Problems: Complaints include issues with bogging down, jumping at idle, and low performance. Owners have tried replacing various sensors, filters, and the fuel pump without success in some cases ().

Starting Problems: Some owners have faced starting issues where the truck won't start or there is no indication of the gear on the shift pad. This could be related to electrical or transmission issues ().

These problems highlight common issues faced by owners of the GMC C7500 1999, ranging from fuel system issues to electrical and sensor-related problems. Addressing these specific areas through proper diagnosis and repair can help resolve the reported complaints effectively.

1999 Gmc C7500 car problems categorized by type of issue

After analyzing all complaints sent to the NHTSA and researching popular Gmc C7500 problems, we found that the most common problems with these 2023 model year vehicles are:

Unknown or other problems

The graph below shows statistics for all 1999 Gmc C7500 vehicle components and the number of complaints received.

1999 Gmc C7500 complaints

The NHTSA has received 1 complaints about various vehicle components related to the 1999 Gmc C7500.

2002-08-15

UNKNOWN OR OTHER PROBLEM

Date Of Incident: 2002-02-13
VIN: 1GDM7H1B8XJ
Components: UNKNOWN OR OTHER
Summary: INTERIOR DASHBOARD IS COMING OFF. DEALER CONTACTED. FEEL FREE TO PROVIDE ANY FURTHER INFORMATION.*AK

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1999 Gmc C7500 recalls

The National Highway Traffic Safety Administration (NHTSA) has issued 4 recalls for different components of the 1999 Gmc C7500.

2002-11-04

Manufacturer: GENERAL MOTORS CORP.
Components: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE
Summary: CERTAIN MEDIUM DUTY C-SERIES AND B7 SCHOOL BUS CHASSIS EQUIPPED WITH A 7.4 LITER GAS ENGINE AND AN IMPCO LPG CONVERSION KIT. SOME OF THESE VEHICLES MAY HAVE ENGINE BACKFIRES WITH SUFFICIENT FORCE TO DAMAGE THE ENGINE AIR INTAKE SYSTEM AND THE AIR CLEANER FILTER ELEMENT.
Consequence: IF THE DAMAGED AIR CLEANER PARTS ARE DISLODGED FROM THEIR NORMAL POSITION, THESE PARTS COULD COME IN CONTACT WITH THE HOT EXHAUST MANIFOLD AND/OR HOT EXHAUST GAS RECIRCULATION (EGR) VALVE TUBE RESULTING IN A POSSIBLE ENGINE COMPARTMENT FIRE.
Remedy: DEALERS WILL INSTALL A REDESIGNED MIXER BONNET AND AIR CLEANER HOUSING COVER, SELECTIVE UPGRADES IN VARIOUS CONNECTIONS RELATED TO THE AIR INDUCTION SYSTEM, AND IF NEEDED, A NEW AIR CLEANER FILTER. OWNER NOTIFICATION BEGAN DECEMBER 18, 2002. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT CHEVROLET AT 1-800-222-1020 OR GMC AT 1-800-462-8782.

2000-09-07

Manufacturer: GENERAL MOTORS CORP.
Components: SERVICE BRAKES, AIR:ANTILOCK
Summary: VEHICLE DESCRIPTION: SCHOOL BUSES, MEDIUM DUTY TRUCKS AND TRACTORS BUILT WITH BENDIX AIR ABS WITH AN EC-17 1030R ELECTRONIC CONTROL UNIT (ECU), THERE HAVE BEEN REPORTS OF UNWANTED ABS ACTIVATION AT LOW SPEEDS CAUSED BY 1) CHAFED ABS WHEEL SPEED SENSOR WIRES ON ROTATING PARTS OR 2) A DAMAGED COMPONENT AT THE WHEEL END THAT GENERATES A CERTAIN TYPE OF ERRATIC SENSOR SIGNAL.
Consequence: THIS CONDITION COULD CAUSE THE ABS ECU TO EXHAUST THE AIR AT THE AIR BRAKE MODULATORS FOR ONE OR MORE OF THE WHEELS. THIS COULD RESULT IN EXTENDED BRAKING DISTANCES AND A POSSIBLE CRASH.
Remedy: DEALERS WILL REPLACE THE ABS ECU.

2000-08-23

Manufacturer: GENERAL MOTORS CORP.
Components: POWER TRAIN:AUTOMATIC TRANSMISSION
Summary: VEHICLE DESCRIPTION: MEDIUM DUTY TRUCKS. THE TRANSMISSION FLUID COULD LEAK FROM A HEAT DEGRADED TRANSMISSION FLUID COOLER HOSE ONTO THE EXHAUST SYSTEM ON THE PASSENGER'S SIDE OF THE VEHICLE.
Consequence: THIS CONDITION COULD RESULT IN A FIRE.
Remedy: DEALERS WILL INSTALL A NEW TRANSMISSION FLUID COOLER INLET HOSE AND OUTLET HOSE DESIGNED WITH A HEAT SLEEVE AND ENSURE ADEQUATE CLEARANCE TO THE EXHAUST SYSTEM TAKE-DOWN PIPE. DEALERS WILL ALSO INSPECT THE RIGHT-HAND EXHAUST MANIFOLD SEAL FOR LEAKAGE, AND REPLACE IF NECESSARY.

1999-11-15

Manufacturer: GENERAL MOTORS CORP.
Components: POWER TRAIN:AUTOMATIC TRANSMISSION
Summary: VEHICLE DESCRIPTION: MEDIUM DUTY CONVENTIONAL CAB TRUCKS AND SCHOOL BUS CHASSIS EQUIPPED WITH AN AUTOMATIC TRANSMISSION, HAVE TRANSMISSION SHIFT CABLE END RODS THAT HAVE NOT BEEN CRIMPED TO THE PROPER SPECIFICATION. OVER TIME, THE SHIFT CABLE COULD BE PULLED OUT OF THE ROD END CAUSING THE DRIVER TO LOSE THE ABILITY TO MANUALLY CHANGE TRANSMISSION GEARS.
Consequence: WITH THIS CONDITION, THE VEHICLE MAY MOVE IN A DIRECTION NOT ANTICIPATED BY THE DRIVER, INCREASING THE RISK OF A CRASH.
Remedy: DEALERS WILL INSTALL A NEW SHIFT CABLE.