2002 GMC Envoy

Tiny
YAK4JEEP
  • MEMBER
  • 2002 GMC ENVOY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 78,000 MILES
As car get warmer about 15 miles auto light on, four wheel selector, then goes 4wheel hi and 4 wheel light blinks, and on turns at slow speeds rear wheel starts to lock up. Go foward rolls free but 4wheel hi light is on and 4 wheel lo blinking
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Saturday, March 6th, 2010 AT 9:18 PM

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Tiny
MERLIN2021
  • EXPERT
The binding in the rear end is troubling. Check the rear end oil and if you deside to change it, add the friction modifiers for the posi unit. That should cure the rear end chatter, All tires should be the exact same size, check on that too. Then Scan the truck for codes, the blinking lights means you have a B or C or U code stored, and this requires a scantool capable of reading them, most good shops can read them. Generic OBD II scanners cant!
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Sunday, March 7th, 2010 AT 9:08 AM
Tiny
2 LINSEY
  • EXPERT
Thank you for using 2CarPros. Com. We appreciate your donation and look forward to helping you in the future.
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Thursday, March 18th, 2010 AT 12:52 PM
Tiny
MERLIN2021
  • EXPERT
Thanks again L.
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Thursday, March 18th, 2010 AT 4:11 PM

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