NHTSA Complaint #11681424 — 2009 GMC SIERRA 1500

The contact owns a 2009 GMC Sierra 1500. The contact stated that while driving at highway speeds, the vehicle hesitated while depressing the accelerator pedal. The traction control and check engine warning lights were illuminated. The contact used a code reader and discovered a misfire in cylinder #4, and performed a compression test, which verified that cylinder #4 was failing to maintain compression. The vehicle was taken to a dealer where it was discovered that there was a failure with the lifter in cylinder #4. The vehicle was not repaired and remained with the dealer for additional diagnostic tests. The manufacturer was notified of the failure but offered no assistance. The contact was referred to the NHTSA Hotline to report the failure. The failure mileage was approximately 56,000.