Switched on 4WD but front wheels did not spin?

Tiny
ERIC VULGATE
  • MEMBER
  • 1999 CHEVROLET TAHOE
  • 5.7L
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
Got stuck in mud. Switched on 4wd but front wheels didn't spin. I remember traction control doing that on an Impala but I see no button for it. Suburban in that situation switched on right away, but not the Tahoe. Lights lit telling me 4wd was on. Neither high nor low would spin the front tires. Is there traction control on the truck? Some forums say 4wd will not engage after you're stuck is this true? Or is it broken? It clunks when you turn it on as though it is engaged.
Friday, July 29th, 2022 AT 7:16 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
It sounds like the transfer case actuator motor is weak which is common. I would remove the motor and then work the control to see if it moves completely. (Key on). Here is the location and how to replace it in the diagrams below. Check out the diagrams (below). Please let us know what happens.
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Saturday, July 30th, 2022 AT 11:31 AM

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