Question about 2002 Chevrolet Blazer

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I got my 2002 chevy blazer with ZR2 package into deep water and shorted out my 4 wheel drive control module (located under the kick plate on the passenger side). I took the module out and had it replaced by a friend. Now when I drive it the 4-wheel drive does not disengage even though the lights on the dash show that it switched into 2-wheel. If I unplug the module the 4-wheel drive disengages but when I am driving it at low speeds ( < 10 MPH) it feels like something in the front end is binding up and then releasing causing a very slight bucking effect. Every time the module is put in the 4 wheel drive goes on. Any Ideas as to why? Also, am I hurting the truck by driving without the module?

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What sounds like is happening is the front end is not disengaging, it will not hurt it to drive without the module, but you need to find out why the front diff. actuator is not releasing. their is a shift motor on the transfer case, module and switch in the cab, and actuator on the front diff. all are susceptable to water, I would suggest getting a manual on it to aid in diagnostics

Posted on Oct 14, 2010

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