GMS1 Code.......
well i ask cause i had went to a chevy dealership to ask if they could get part numbers for black radio/HVAC and HHR SS steering wheel airbag(pointless stop it was) and decided to ask and thats the option i was givin
nope the code is good for that one time use they link it to your vin number. so if you need any warranty work and see your icu flashed they wont trip all ready have had mine replaced and my tune was still there
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