Question about 1999 Chevrolet Blazer

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I have a 99 Chevy Blazer, I have had it for about six months or so. The past month and a half, it pops out of 2 wheel drive and into 4 wheel drive (sometimes blinking back and forth between 4 hi and 4 lo). It does this while driving. It is mostly when driving a lower speed. We can't figure out why, and the garages want 85 - 100 an hour just to look at it. Any ideas?

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I have the same trouble. It seems a relay is keeping it in 4wheel drive. I havne't solved the trouble yet. It may be a loose or corroded wire in the connector to the TCCM located in the passenger kick panel. Dealer part about $450 or more. For the moment I took out the fuse for the 4 wheel drive. It is located in the lower right hand side in the fuse the box under the hood. It disengages the 4wheel drive and I replace the fuse if I need the 4wheel drive.

Posted on Oct 22, 2010

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