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1999 Chevy Suburban 4X4 out

Tiny
GSMITTLES
  • MEMBER
  • 1999 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 140,000 MILES
What is the possible cause of the 4 wheel drive not engaging? It's an electronicly controlled system. When I push the All Wheel drive button, the light comes on but the 4x4 doesn't engage. If I press 4x4 HI I get an idiot light that says Service 4 Wheel Drive System. Of course, 4x4 Low won't engage either. Any ideas on what the repair cost might be?
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Tuesday, November 25th, 2008 AT 12:00 PM

1 Reply

Tiny
PEAR69
  • MECHANIC
  • 1,482 POSTS
It is most likely the actuator motor on the transfer case or the axles. However, it could be as simple as a switch or a loose ground.
Actuator motors are somewhat easy to replace but the part costs around $300 plus labor.
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Tuesday, November 25th, 2008 AT 12:54 PM

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