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1989 Chevy S-10 4 wheel drive

Tiny
27
  • MEMBER
  • 1989 CHEVROLET S-10
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 123,000 MILES
1989 S-10 Blazer 123000 miles. THe 4 wheel drive will not engage. The front tires dont light up on the diagram of the truck. It does light up the left of the diagram. New accuator and still wont work. Any suggestions. Thanks
Thursday, July 23rd, 2009 AT 4:52 PM

1 Reply

Tiny
JMALECKI
  • MECHANIC
  • 118 POSTS
Hello

There is a switch on the transfer case, this should be a vacuum operated system make sure you have vacuum to the switch and that when switched into 4X4 make sure you have vacuum going to the actuator if not either switch is bad or a hose is broken. Check the vacuum lines common breaks near firewall from heat.

John Malecki
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Thursday, July 23rd, 2009 AT 8:43 PM

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