One problem related to catalytic convertor has been reported for the 2008 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 GMC Sierra 1500 based on all problems reported for the 2008 Sierra 1500.
The contact owns a 2008 GMC Sierra 1500. The contact stated that after the dealer repaired the vehicle under NHTSA campaign number: 21v050000 (air bags) and gm's emission recall: n140581 (carbon monoxide emissions), the vehicle nearly caught on fire. The contact stated that while driving at an undisclosed speed, the contact turned on the a/c, and the vehicle started shaking abnormally. Additionally, the vehicle made abnormal sounds, jerked, and stalled while driving. The vehicle was taken back to the dealer, and there was smoke coming from under the hood. Upon inspection, the dealer discovered that the catalytic convertor was extremely hot and glowing red. The dealer determined that the exhaust system and catalytic convertor needed to be replaced. The vehicle was then towed to the residence. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was opened. The failure mileage was 151,071.