four wheel drive not working on 2000 Chevrolet Blazer

bought used. four wheel drive stopped working right away. repaired by dealer. not working again. why

by in Boring, OR on July 07, 2010
1 answer
ANSWER by on July 27, 2010
You could try checking the black vacuum line against the firewall, towards the top of the engine bay. If you look at your distributor and look right there are two small plastic fittings for two vacuum lines. i think its the bottom one that controls whether the 4wd engages or not. I'm terrible at explaining things but i hope that helps, my 4wd stopped working after i took it in to get a tune up. I took a look under the hood and saw that had taking off the vacuum line and not put it back on.
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