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AT4 Transfer case control module

Morrisk64

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Morrisk64 New Member

Morrisk64

Posted
Posted

Jumped in my AT4 this morning for a 7 hour trip from IL to MI and it was locked in 4WD and I could not change to 2 high at all. Gears sounded and felt all messed up, made like a whining and grinding noise and was way worse low speed turning because the wheels appeared to be jumping. The engine light was on as well. Thankfully there happened to be a GMC dealer across the street from my hotel so I took it in. They checked everything and determined it was the transfer case control module. The part is supposed to be here in the morning so back to the hotel I go.  So far this truck has the same crazy messages that pop up in really cold weather, my park assist is messing up and my seats vibrate for no reason like it senses something in front of the truck, my DIC goes black at least once a day sometimes for 10 seconds and sometimes for 10 minutes. And apparently there was a trailer I disconnected...you all have discussed these things but man it is very irritating to me, considering the price of these things.  Trying to remain optimistic and hope the bugs all get fixed soon so I can build me some confidence taking this thing on trips. 

OnTheReel Senior Enthusiast

OnTheReel

Posted
Posted

I hear ya. Hopefully the fix goes smoothly for your transfer case (even though it shouldn’t have happened in the first place). 

 

The cold weather bugs, well, no fix for those. That’s what irritates me the most. I understand stuff happens, but if after months there’s still no solution from the biggest automaker in the world...well...that’s just not right.

 

Also feel like these issues should have been readily apparent during pre-production testing, given the amount of people with the problems.

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