Question about 1998 Chevrolet Blazer
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Posted on Jan 02, 2017
I replaced the malfunctioning “thermal actuator” with the “Warn” Vacuum actuator setup, it’s been working great for about 7 years now, simple install, if I remember correctly, it was about $150.
That’s what engages the front diff into 4wd.
Posted on Nov 25, 2008
try putting it in neutral while it's running with foot on the brake then push 4 hi or 4 lo it should switch over then. Had the same problem on my 98 blazer the other day.
Posted on Oct 30, 2009
It's most likely the "four wheel drive actuator" This is located on the front differential housing. It's cylindrical shaped and has a large hex (about
1-1/4") and two wires coming out of it. Usually they short out and blow the fuse but, I've also seen where they just quit working and sometimes they just get slow to work. The "actuator" has a heating element in it and it warms up, some sort gas, causing it to expand thus engaging the front wheels. In cold weather it may take a minute or so for it to engage, so put in four wheel drive and wait for a bit and see what happens.
Posted on Jan 05, 2010
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