Hi, my dad has a Chevy tahoe (2016 i believe) a while back in like 2020 the dealership effed it up after we brought it in for coding issues because it got towed and the key wouldn’t work. if it goes above 2,500 RPM (around 30 miles per hour) it’ll start sounding like a damn semi and will not go faster, then it went into REP, after that the car would no longer accelerate past 10 MPH (it was a sad ride home, luckily we only got a mile away) we reset the codes with my dads scanner thing the REP light disappeared but it won’t go above 10 MPH and it sounds like it won’t switch gears..? It genuinely sounds as if a semi is trying to speed up, but also as if someone is revving the engine if you try to go past 10 MPH. You could literally give all your might to the gas pedal and it will not speed up and like I said, just sound like a semi. We literally just replaced the car battery and the remote key batteries, obviously there are more problems but even with my dad having mechanic experience he’s just stumped. I’m the only one helping him and I personally have a fear of working on cars and even driving them (stupid yeah but I hate cars i genuinely would rather go my whole life without driving one or fixing one) and I can’t rlly help him to my fullest because of my fears stopping me lol. My dad doesn’t ask outside people for help so just wanted some help onto what it might be. I’d add videos and pictures of the codes but it won’t let me. Oh another thing, when we shut off the car the fan kept going even tho the engine was off, my dad said it probably overheated then he checked the codes and got it to stop. The dealership did smth to the car and ever since it’s just a peice of crap car. We haven’t been able to actually drive it in YEARS because of it. We just wanna sell it or trade it in, but obviously we have to fix it first. Genuinely wish the car would just get ripped apart by a tornado but til then we will try to fix it 😭
Thank you for any ideas or suggestions.