Consumer Complaints


Fail datemilesoccurencesPurchase date
POWER TRAIN
02/02/2013550001
 Driving on the freeway, when truck started running rough. i managed to make it to the side of the freeway before the truck stopped working. towed to gmc dealer. broken throttle body sensor and broken steering position sensor connector. *tr
03/09/201125
 When i first drove my new truck i noticed a subtle knocking noise coming from the rear when driving slowly over a bump. the dealer
11/18/20101500
 On november 18, 2010, returning from vacation, driving a new 2011 gmc sierra sle pick up with less than 2,000 miles use, pulling a 24' travel trailer. the truck was in tow mode decending a 15% grade hill at approximately 45 mph. i was not accelerating when the truck down shifted itself automatically from 5th to 3rd gear and the engine accelerated to 4000 rpm. i applied brakes and truck shifted back to 5th gear. fortunately conditions were dry and no accident occured. cruise controll was not engaged at the time as terrain was very hilly and twisting. truck shifted and accelerated without warning. continued trip without further problems.
POWER TRAIN - AUTOMATIC TRANSMISSION
11/18/20101500
 On november 18, 2010, returning from vacation, driving a new 2011 gmc sierra sle pick up with less than 2,000 miles use, pulling a 24' travel trailer. the truck was in tow mode decending a 15% grade hill at approximately 45 mph. i was not accelerating when the truck down shifted itself automatically from 5th to 3rd gear and the engine accelerated to 4000 rpm. i applied brakes and truck shifted back to 5th gear. fortunately conditions were dry and no accident occured. cruise controll was not engaged at the time as terrain was very hilly and twisting. truck shifted and accelerated without warning. continued trip without further problems.