GMC has a competitive power train warranty as well as shorter bumper-to-bumper warranties. Medium duty GMC trucks are not included in the standard GMC power train warranty.
- The power train warranty covers certain components of the drive system, transmission and engine for five years or 100,000 miles. There is no deductible for service or parts that are covered by this warranty. The warranty does transfer to all subsequent vehicle owners during the warranty period, and there is no cost for the transfer.
- The engine components covered include: timing chain and cover, the timing gears, cylinder head, valve covers, gaskets, oil pump, manifolds, gaskets, turbocharger, OCH carriers, the engine mount, water pump and every lubricated engine component. The vehicle's timing belts are under warranty until the first of the vehicle's schedules maintenance sessions.
- The transmission parts covered by the power train warranty include: the transfer case, the transaxle mounts, torque converter, all gaskets and seals and all of the lubricated parts located internally.
- The drive system components covered under this warranty include: the axle shafts, axle bearings, the hub bearings from the front and rear, all seals, universal joints, axle housing, the final drive housing, constant velocity joints, wheel bearings, all gaskets and supports, the front differential actuator and all of the internal, lubricated components.
- During the five years or 100,000 miles of the power train warranty, GMC offers courtesy transportation when the vehicle is being repaired for a problem covered by the warranty. In some cases, reimbursement for alternative transportation is given instead of transportation itself.
- To keep the warranties, the vehicle must have the schedule maintenance suggested in the owner's manual. Damage from misusing the vehicle or its components, traffic accidents or from using low-quality fuel is not covered by the warranties.
- Various divisions of GMC have different bumper-to-bumper warranties.
- Vehicles made by the Chevrolet, Saturn and Pontiac divisions of GMC are covered by a bumper-to-bumper warranty for three years or 36,000 miles. Vehicles made by the Cadillac, Buick, Saab and HUMMER divisions are covered by the warranty for four years or 50,000 miles.
- The bumper-to-bumper warranty does not cover routine maintenance on the vehicle. It covers items that have defects and problems caused by poor workmanship. It has no deductible and includes the repair costs for both labor and parts.
- The Roadside Assistance Program is GMC's 24-hour emergency coverage. It covers the driver of the vehicle for five years or 100,000 miles against roadside emergencies like a flat tire, a lock out, running out of gas or a vehicle breakdown.
- The GMC corrosion warranty is good for six years or 100,000 miles. It covers the vehicle for any holes created by rust that occur in the body of the vehicle and any parts made out of sheet metal. There is no extra maintenance needed to keep this coverage.
- Any after-market items installed on the vehicle are not covered by the warranties and any damage caused by them is also not covered.