2002 GMC Envoy 4-WHEEL DRIVE

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

THE ANTIL0CK BRAKE SYSTEM ISN'T OPERATING PROPERLY.
Nov 11, 2009 at 7:43 PM
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SERVICE WRITER
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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.
Nov 12, 2009 at 7:22 AM
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KEN DALLAS
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The ABS dose not work when you apply the brakes on icy/snowy roads which makes it difficult to stop.
Nov 12, 2009 at 5:30 PM
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SERVICE WRITER
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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.
Nov 12, 2009 at 5:42 PM
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