- The problem
- 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.
- The risk
- 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.
- The fix
- 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.
Vehicle safety record
1999 GMC C6500 Problems, complaints & recalls
No owner complaints about the 1999 GMC C6500 have been filed with NHTSA. It is covered by 4 recalls, the latest in November 2002 for the gasoline.
NHTSA data checked
FFar more problems than a typical C6500 year, for its age
- Complaints
- 0
- Recalls
- 4
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
1999 GMC C6500 recalls 4
Recall repairs are free. Your dealer fixes them whether or not you bought the car there - check your VIN at nhtsa.gov/recalls to see if yours is done. What to do
- The problem
- 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.
- The risk
- 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.
- The fix
- DEALERS WILL REPLACE THE ABS ECU.
- The problem
- 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.
- The risk
- THIS CONDITION COULD RESULT IN A FIRE.
- The fix
- 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.
- The problem
- 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.
- The risk
- With this condition, the vehicle may move in a direction not anticipated by the driver, increasing the risk of a crash.
- The fix
- DEALERS WILL INSTALL A NEW SHIFT CABLE.
What owners say
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No complaints about the 1999 GMC C6500 yet
No owner has filed a complaint about this vehicle with NHTSA. If yours has a problem, share it here and report it to NHTSA.
GMC C6500: every year compared
All C6500 years1999 GMC C6500 vs rivals
| Vehicle | Complaints | Recalls | Grade | |
|---|---|---|---|---|
| 1999 GMC C6500 | 0 | 4 | F | |
| 1999 GMC C Pickup | 3 | 0 | - | Compare |
| 1999 GMC Blazer | 2 | 0 | C | Compare |
| 1999 GMC B7 Chassis | 1 | 0 | - | Compare |
| 1999 GMC Bus | 1 | 0 | C | Compare |
| 1999 GMC C Series (light) | 1 | 0 | - | Compare |
More sales usually means more complaints, so compare similar vehicles of the same year. The grade compares each vehicle with its own model's other years.
Questions about the 1999 GMC C6500
Does the 1999 GMC C6500 have any recalls?
Yes - NHTSA lists 4 recalls for the 1999 GMC C6500: gasoline (November 2002); antilock (September 2000); automatic transmission (August 2000); automatic transmission (November 1999). Recall repairs are free at any authorized dealer. Enter your VIN at nhtsa.gov/recalls to see whether yours has been fixed.
How many complaints has the 1999 GMC C6500 had?
None have been filed with NHTSA so far.
Is the 1999 GMC C6500 a reliable vehicle?
Its Safety Index is 21 out of 100 (grade F: far more problems than a typical GMC C6500 year, for its age). The index weighs complaints, crashes, fires, injuries, deaths and recalls against how long the vehicle has been on the road, compared with the same model's other years. It is not a measure of every repair - read the complaints and owner experiences, and have any used vehicle inspected before you buy.
Which GMC C6500 years have the most complaints?
2007 (1), 2009 (1). See every GMC C6500 year compared.
What should I do if my 1999 GMC C6500 has a problem?
If it is a safety problem, stop driving it if it is unsafe and contact your dealer. Report it to NHTSA at nhtsa.gov/report-a-safety-problem - enough reports start investigations and recalls - and share your experience here so other owners know what to look for.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data