2021 Yukon slips when accelerating.

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Asercey80

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2021 Yukon seems to be slipping or making a slip bump sensation when I am stopped and start to accelerate. At first I thought maybe it was because it’s always rainy where I live but we just had knee tires put on and it is doing the same thing. Any ideas?
 

thill466

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2021 Yukon seems to be slipping or making a slip bump sensation when I am stopped and start to accelerate. At first I thought maybe it was because it’s always rainy where I live but we just had knee tires put on and it is doing the same thing. Any ideas?
Did you ever figure this out? My wife's 22 at4 has a slip/driveline slack on acceleration 1 our of 10 times from a dead stop.
 

tom3

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Not sure on the newer stuff but being just a bit low on trans. fluid can cause this on some transmissions, Mopar stuff for sure.
 

coachhomer

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My wifes 2021 just started doing this and I was hoping to find some information on here. I hooked it up to a scanner and the trouble code I received was U043A Invalid Data Received from Suspension Control Module B. Will be searching and get back with any additional info I find.
 

thill466

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2021 Yukon seems to be slipping or making a slip bump sensation when I am stopped and start to accelerate. At first I thought maybe it was because it’s always rainy where I live but we just had knee tires put on and it is doing the same thing. Any ideas?
My wifes 2021 just started doing this and I was hoping to find some information on here. I hooked it up to a scanner and the trouble code I received was U043A Invalid Data Received from Suspension Control Module B. Will be searching and get back with any additional info I find.
Any luck finding your issue?
 

thill466

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Not yet. Holiday weekend but ours seems to be getting worse. Will definitely report back with any findings...
FWIW, I noticed my wife's car was in "auto". I know GM claims it wont damage it to leave it in auto, but obviously there is no need to leave it in auto for daily driving if the car is a pavement princess. I switched it to 2wd, and could not get the slight random thud to replicate. I only drove it for 15 minutes, once I'm able to drive it more I will report back if that solved the issue. Would be interested to know if y'alls is also in auto or 2wd when you had the bump?

@Asercey80 @coachhomer
 

steiny93

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There is another post about slipping type behavior; I did a quick search but didn't find it. Root of the issue was the OP had been running in Auto for a very long time.
Basically, Auto in the dry accelerates wear in the drivetrain and it feels like slippage.
 

coachhomer

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FWIW, I noticed my wife's car was in "auto". I know GM claims it wont damage it to leave it in auto, but obviously there is no need to leave it in auto for daily driving if the car is a pavement princess. I switched it to 2wd, and could not get the slight random thud to replicate. I only drove it for 15 minutes, once I'm able to drive it more I will report back if that solved the issue. Would be interested to know if y'alls is also in auto or 2wd when you had the bump?

@Asercey80 @coachhomer
So funny. You beat me to it. That was my wife's issue. Never noticed it.
 
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