Having issues with my 8.1. Throttle body has been replaced & tps on pedal because would go into limp mode & P2135 code in ecm. Dealer found bent pin for rpm & also fixed. Truck ran fine for 6-8 weeks & now back to limp mode & P2135 code. You shut it off for a minute & start it back up & it will be fine again. Any ideas?
Sorry, it's an 03 Silverado quad cab LS.