Question about 1997 Chevrolet Blazer
Front end lock is vacuum actuated and if there is no vacuum from the shifter switch, it will not lock the front end. Make sure there is vacuum going down to the switch/valve on the shifter with it in 4wd and engine running, then find if there is vacuum coming out the other side of the switch on the tranny shift valve. On the right fender you will find the cable pull that the vacuum actuates to pull cable and put the front end in gear. Have someone watch while you shift into 4wd to see if the cable is pulled. Check there to see if there is vacuum coming to it when in gear. If there is no vacuum there then the shifter vacuum switch is bad or the line is not connected.
Posted on Nov 30, 2014
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Posted on Jan 02, 2017
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