One problem related to gasoline engine has been reported for the 2006 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 GMC Sierra 1500 based on all problems reported for the 2006 Sierra 1500.
At the first oil change in my new 2006 GMC sierra, I found pieces of metal (assembly from the engine) attached to the magnetic drain bolt. Such is usually symptomatic of a defective bearing or something. No problem as of yet with the vehicle, but registering this observation. For record purposes. The attendant at the place where I got the oil changed said my vehicle was the fourth one he's observed with the same kind of metal pieces.