Question about 2001 Chevrolet Blazer
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Posted on Jan 02, 2017
SOURCE: 1999 chev blazer 4x4 system
When you say that the 4wd won't engage, I assume you mean that the front differential is not locking in. If memory serves me correct there is a 3 port vacuum switch located on the top of the transfer case that gave a lot of problems. When the transfer case is shifted to a 4wd mode (high or low) this vacuum switch changes position and routes engine vacuum to the actuator located under the battery tray. This actuator then pulls a cable that move a fork inside the front differential that locks the front diff in 4wd. The vac switch gave a lot of trouble, but any broken vac hoses or differential internal mechanical issues could present as the same issue.
Posted on Nov 23, 2008
did you take the short shaft loose? even if it were seized it would still come out.you may have to wiggle it back and forth a bit to work it loose but it should come out.
Posted on Jan 08, 2009
Hello, your EBCM is located on the frame underneath the vehicle just below the driver's seat. Sorry, I don't have a picture of it. Have you had brake work done recently?
Posted on Mar 06, 2010
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