Havasubum started following 2017 Suburban new owner, Unknown device connected to my OBD2 port, 2020 GMC Sierra 1500 AT4 diesel rear main seal failure and and 1 other
This is an FYI for anyone having trouble with the range and performance of the key fob. I was having problems with my 2020 Tahoe's door locks. The door handle button would often fail to work especially in the summer heat. Also, the remote start wouldn't work unless I was right next to the car. Dealership found a TSB for bad antenna modules. They replaced the module and everything works great.
Apparently you have an all wheel drive, not a 4 wheel drive. It would be more cost effective to sell it and buy a 4 wheel drive. Not only does the entire drive train needs to be replaced, but it has to be wired into the BCM. Good Luck Jerry
The dull reality to your issue is there is NO fix. My 2017 Denali had the valve body replaced and fluid changed to synthetic. Nothing helped. Your only option is to join the class action lawsuit and try to lemon law it. Sorry but there is no good news. GM knew they had a loser and kept installing them anyway. Sort of like the ignition switch scandal. Look here
Just bought a 2020 Tahoe Premier with the 10 speed. It is so much better than the 8 speed. There is no comparison. Ford has been using it for several years and have not received complaints.
I have always had luck calling GM Customer support. They have been helpful for me. Also, I have a friend whose Equinox is burning oil. GM Customer Service took ownership of his problem and is currently helping.
There is a TSB on the seat problems.
GM no longer sells GMPP extended warranties. They use Ally with the same coverage. The dealership offered Allstate; but I wanted what was closer to GMPP. Ally was a little more money than Allstate. However, Ally had more mileage/time choices and it is instantly usable at all GM dealerships, when some are not that universal.. I used to buy extended warranties for my motorhomes. I found the best ones were called exclusionary. They list what is. NOT covered rather than confusing the buy with a list what IS covered, which is extremely confusing. California will not allow exclusionary policies.
We buy extended warrantees on all our new GM cars. Some may say it's a waste. However, cars are so complicated with such sophisticated electronic systems, any electronic failure will be very expensive.
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