Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1978 K25.
The 1978 GMC K25 is a heavy-duty pickup from GMC’s truck lineup, built on the square-body platform. For the K25 model line, complaint data from 1990 through 1996 shows a low rate of issues, with a peak of just two complaints in 1995 and a low of one in 1993. This suggests that the 1978 model year, as an early example of this generation, benefits from a design that proved reliable in subsequent years.
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
Showing 2 of 2 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 FRONT NUTS MAY NOT HAVE BEEN TIGHTENED TO SPECIFICATIONS. THESE NUTS COULD LOOSEN DURING VEHICLE OPERATION AND CAUSE THE FRONT HUB AND ROTOR ASSEMBLY TO SEPARATE FROM THE WHEEL AND TIRE ASSEMBLY. Remedy: THE DEALER WILL TIGHTEN THE NUTS TO SPECIFICATIONS ON ALL AFFECTED VEHICLES AT NO COST TO OWNER.
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 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.