2019 Chevrolet Silverado 1500 LD 5.3L
It has 90.600 miles on it, I also used a tuner at 25,000 miles to get ride of the fuel saver mode. I just replaced the transmission and got a jasper transmission. Since that I have had an alternator fail, an O2 sensor code that I can’t get to go away with a new sensor installed and now I’m getting a multiple misfire code and rough idle and can’t drive it. I’ve literally only driven it 5 miles since I replaced the transmission and it seems like everything is failing. Any ideas?
Also automatic transmission
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Who put the transmission in? Someone who knew what they were doing? Id imagine that it needs to be completely reprogrammed, maybe something in the computer got messed up there.
take it to GM for warranty service.
