This fancy loaded 2020 GMC Sierra 3500 Denali Duramax truck has an embarrassing problem: The electric tailgate is BROKEN, so you can't use the bed of your fancy new truck!!
Previous owner said that it was involved in a minor rear-end collision, and the tailgate was repaired but now the electric actuators don't release.
There is a warning message on the dash that says "INNER TAILGATE OPEN"...that's the ONLY clue we have, and a scanner is not very helpful!!
Let's see if we can diagnose and solve this weird problem without buying any EXPENSIVE parts ;)
2023 LAUNCH X431 PRO3S+: ****$160 OFF!!*****
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Enjoy!
Ivan
