GMC C6500 complaints by model year
1998 GMC C6500 recalls (2)
Service brakes, air › Antilock
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…
Remedy: Dealers will replace the ABS ECU.
Electrical system › Wiring › Front underhood
Vehicle description: medium duty trucks equipped with air brakes and anti-lock brake systems. Chaffing of the electric brake control harness can occur resulting in an electrical grounding condition. This will illuminate a warning light on the instrument panel and shut off the ABS feature.
Remedy: Dealers will inspect the harness for chaffing and proper routing and will repair if necessary.
Frequently asked questions
How many recalls does the 1998 GMC C6500 have?
There are 2 recalls for the 1998 GMC C6500, the most recent from September 7, 2000 (antilock). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.