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Jamesg89 · 12-16-2020, 11:08 AM

Can you even adjust the tune on the '20 TCMs? I thought after '19 they couldn't unlock them anymore.

I also doubt GM employees will tell you how to adjust anything in the tune of the car.

12-16-2020, 11:08 AM	#2
Jamesg89 Drives: 2019 2SS & 1998 SS Join Date: Jul 2017 Location: Indiana Posts: 169	Can you even adjust the tune on the '20 TCMs? I thought after '19 they couldn't unlock them anymore. I also doubt GM employees will tell you how to adjust anything in the tune of the car.