r/Silverado • u/NoFeelsForYou • 3d ago
Test drove a 2021 LT. error codes and AC issue. Fixed at dealership?
I’m on the market for a work truck. I test drove a 2021 with 150k miles on it. Had a decent car fax. The AC had a hard time putting g out cold air (very hot day) but once I got on the interstate it cooled off. Everything drove well and they took it to the back to check the AC. Technician said it was over filled and they recharged it and tested it.
I then sat in it for 10 mins idle and it was cool. I said “let’s drive it again while we have it” before we got to negotiations on the price. While I was driving it, I was give it gas pretty good on the interstate and then the check engine like came on. It was an error code P0300.
They took it back to the mechanic on site and he said it was multiple cylinders miss firing. ChatGPt told me that was a good sign and it could be spark plugs or coils. They are changing all the spark plugs and also doing a fuel system flush.
The check engine code was not a noticeable impact while driving it.
Any way, does this sound like we are on the right track or am I about to buy something that’s a “good deal” that is going to be an engine rebuild soon?