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...
Engine & cooling
GMC C7500 Engine problems by year
1 complaints filed with NHTSA about the GMC C7500's engine & cooling. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.
Engine complaints by model year
Engine recalls
Latest C7500 engine complaints
Vehicle overheats every 15 minutes and leaks alot of brake fluid causing smoke to pour out from tires horn doesn't work and head light is broken and a.C. Is broke vehicle is forced upon employees to drive under these conditions everyday on high way city streets
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data