SOURCE: 4wd light will not come on to say its ingaged
check possible switch malfunction first then check transfer case motor 4wd dash switch sell for 20-25 dollars, transfer case motor new 375-450 new or rebuild also junkyard 75-100 dollars
SOURCE: I need to locate the
Call Gm They can fax over a copy to you or oick one up /call the parts department its free
SOURCE: my 2000 blazer won,t select 4wd hi/low or auto
there is a vacuum solonoid on the firewall in the middle with 2 vac lines and a 2 wire plug
thats ur problem
push the button and smack it with the handle of a screwdriver should work
SOURCE: 4wd not engaging
Is it a two wire actuator or a three wire actuator? The two wire ones are pretty unreliable. that is why Chevrolet converter them to the three wire. Check for power and ground on the two wire in 4wd. For the three is should have one ground wire, one wire that is hot in 4wd, and one wire that is hot in 2wd.
SOURCE: 01 Chevy Silverado 4 X 4 not working. 4WD light
Having the same exact problem but with my 1999 escalade. Thought it was the actuator bought a new one installed it transfer case would engage but front end wouldnt lock. Took it out of housing left it plugged in got a friend to go through all the 4wd for me and the plunger never moved out the actuator. Checked my wiring harness which is a four prong ann it had one hot prong like it is suppose to. Traced wires even replaced dash switch same problem. Taking it to local dealership tom to have it checked for codes. I was told it could be the transfercase actuator even though its workin that actuator is what sends power to the front to engage the actuator to lock the differential.
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