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2015i GMC 2500 SLT 4X not working right

Sierra Boy

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Sierra Boy Enthusiast

Sierra Boy

Posted
Posted

Had to move the truck after removing all the wonderful snow that was dumped on us today...I put in 4XH and pulled out into the unplowed street and got stuck. Noticed the 4XH was not lit and truck was stuck and slipping and had NO power. Would not go over 8 MPH while wheels were slipping. Redid the switch to 4XH and light came on finally and truck moved back into the driveway.

 

Question is I guess the 4XH was stuck or frozen but why no power to move the truck? Gas 6.0/ 6 speed. Will the truck be good to drive tomorrow as the wife will drive it to work?

 

Sierra Boy

Cosmic Charlie Enthusiast

Cosmic Charlie

Posted
Posted

only shift while moving from 2 high to 4 high and back ... and front wheels straight

if you were stationary the electric shift parts may hang up ...

also no spinning the tires during the shift

 

even 1 mph is enough for the shift

Sierra Boy Enthusiast

Sierra Boy

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  • Author
Posted

I moved the truck 30 feet after I put into 4XH...never in-gaged. But why the no power during the slip? Once it went into 4XH finally it went forward then backward into the driveway. Under stand that it was cold and maybe had to unstick to work.

 

I was moving gear select back and forth trying to get to move in the unplowed street and that is when the power was lost. Once 4Xh was in-gage it moved fine. Is there something on the truck that drops power when it slips when NOT in-gaged in 4XH?

 

Sierra Boy

Sierra Boy Enthusiast

Sierra Boy

Posted
  • Author
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Thanks...that's what it seems like it did. Once the 4XH in-gaged it went into reverse and moved. I did not drive the truck any and guess I should in the morning so the wife is safe and the truck won't break down.

 

Thanks

 

Sierra Boy

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