WILL NOT LOCK THE FRONT WHEELS IN
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2002 Chevrolet Blazer Question: where is the 4-wheel drive front actuator ?
Answer #1pushrod March 01, 2014, 13:40Master
The most common cause for this is a vacuum leak or the vacuum switch on top of the transfer case. Vacuum actuated front axle! Switch is NAPA part # 730169.. Tough to change without a lift.! That will fix 95% of them i have found,, fixed mine as well.. Possible actuator under battery tray but less likely.