Question about 2004 Chevrolet Silverado 2500HD

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I have a 2004 chevy silverado, the service 4wd notice has come on. We replaced the 4wd module on the dash but it still says it needs to be serviced and will shift into 4hi as we are driving down the road. I know there is a couple other things we can check but can't find any schematics to see where these other modules or wires are at. Any suggestions?

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  • lzgirl08 Apr 27, 2010

    Is there a drawing we can get ahold of to know what we are looking for/at?

  • lzgirl08 Apr 27, 2010

    This helps, just need a drawing.

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Did you clean or replace the module on the tranny itself? That is usually the problem. Also be sure to check your hubs, and also your fluids in transfer case and tranny. The modules on the tranny should be the first thing to check.

Posted on Apr 27, 2010

  • Nate Stansfield
    Nate Stansfield Apr 27, 2010

    I will see what I can dig up

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