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I’m at my wits end over this I’m not sure if it’s been discussed on here yet but I’m having a serious problem with my truck going into limp mode at random. I have a 2007 GMC Sierra, SLT, Z71 (newer body style) It runs fine for weeks, sometimes even months. Out of nowhere it’ll go into limp mode with these dash warnings: ”engine power reduced” ”traction control off” ”service traction control” ”service stabilitrack” Readings are: P2138 C0242 C0899 C0900 I replaced the engine due to a cam and lifter problem about 3 yrs ago. The truck started acting up about a month after the engine was replaced. The engine is still under warranty. -I’ve changed the gas pedal sensor. -I’ve changed the throttle body and throttle positioning sensor. -I’ve changed the electronic control module (ECM) -I’ve changed the electronic brake control module (EBCM) -I’ve even replaced the battery cables -I’ve added a new ground wire, thinking I had a bad ground somewhere. - I’ve checked and cleaned all connections into the throttle body, gas pedal, and all the plug ins I could see and get to. I had a guy tell me to look at the brake booster and possibly change that. It might be leaking or something. I’m not sure if that’s accurate advice and I haven’t done anything to the brake booster. Other than fooling with the brake booster, I’ve literally done everything I know to do except change the entire wiring harness!!! I don’t want to do that though. I love the truck and I don’t want to sell it but Im tired of putting money into it. Any help would be greatly appreciated. I’m on the verge of pushing it off of a tall cliff! help! - James