I've referred to this many times over the years and I've had zero issues after the installation.
Also, it helped a friend of mine resolve transmission issues he was having with his 2018 GMC Sierra.
Chevrolet TSB 21-NA-199.pdf
Seems to be a BCM issue.
Have it scanned and checked for codes.
Erase all faults and see if the issues return.
If so, you might want to reach out to White Automotive for a BCM replacement.
I had some interest in this when the tax credit still existed and it was going to be super cheap. Still like the concept but not so sure of the value. Check a few option boxes on the SUV version and it’s right up there with a base Model 3. Nevermind that depreciated low mile Model 3s are in the 20s.
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