Mechanics

CHEVY 4 HI WON'T ENGAGE

2004 Chevrolet Blazer

Transmission problem
2004 Chevy Blazer 6 cyl Four Wheel Drive Automatic 97000 miles

Was wondering if someone knew the location of or knows of diagram for the front axle vacuum actuator for a 2004 chevy blazer. Problem is that when I attempt to go into 4 hi the lights on my puch button control panel flashes then defaults back to 2hi. It has no problem going into 4 lo, just 4 hi, thanks.
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DD1969
June 20, 2008.




Sounds like a faulty switch, TCCM or actuator on the transfer case.
The vacuum actuator is under the battery. However if it goes into 4lo the actuator is working.

Tiny
SWilliams
Jun 25, 2008.


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