Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1978 C25.
The 1978 GMC Truck C25 is represented in this overview chiefly through its documented complaint activity from 1990 to 1996, a window that captures the truck as it aged into middle and later service life. Within that span, owner complaints peaked in 1995 with three reports and hit their low in 1992 with just one, producing a narrow range that never exceeded three complaints in any single year. That restrained, uneven pattern places the 1978 C25 toward the quieter end of the model's recorded complaint history, suggesting relatively few documented owner-reported issues during the years surveyed.
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
Showing 1 of 1 campaigns on record for this vehicle.
THE NUT ON THE CARRIER SUPPORT BOLT ASSEMBLY MAY BREAK WHICH WOULD ALLOW THE ENTIRE WHEEL AND TIRE ASSEMBLY TO SEPARATE FROM THE VEHICLE. Remedy: DEALER WILL REPLACE THE TIRE AND WHEEL CARRIER BOLT ASSEMBLY AT NO CHARGE.
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Cross-vehicle references for the kinds of data on this page.
NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.