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2002 GMC Envoy 4-WHEEL DRIVE

Tiny
KEN DALLAS
  • MEMBER
  • 2002 GMC ENVOY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 98,580 MILES
THE 4-WHEEL DRIVE SYSTEM WILL NOT ENGAGE AND THE INDICATOR LIGHT WILL NOT COME ON.

THE ANTIL0CK BRAKE SYSTEM ISN'T OPERATING PROPERLY.
Wednesday, November 11th, 2009 AT 7:43 PM

3 Replies

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
What do you mean the abs isn't working right?

Describe what is happening with the ABS and I'll reply.
These may be related problems.
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Thursday, November 12th, 2009 AT 7:22 AM
Tiny
KEN DALLAS
  • MEMBER
  • 2 POSTS
The ABS dose not work when you apply the brakes on icy/snowy roads which makes it difficult to stop.
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Thursday, November 12th, 2009 AT 5:30 PM
Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
Ahhh. Does not work at all. So the ABS light must be on. There are codes in the computer that will help us track down the problem more than likely. However, it may need to be driven with a scanner that can read the wheel speeds. Sounds like a speed sensor issue. The 4wd drive can't engage because the computer is unable to get a signal from one of the sensors.
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Thursday, November 12th, 2009 AT 5:42 PM

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