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Chevy 4X4 Repair

P1631 keeps engaging how do I fix it?

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This sounds strange but it works! Clear all codes, turn the key to the on position and leave it there for 25-30 min, a battery charger or jump box is recommended but not absolutely ness as long as all accys are off. then try to start it, if problem persists see a gm dealer.

Posted on Oct 20, 2013

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Posted on Jan 02, 2017

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SOURCE: 1989 Chevy Pick-up..when 4x4 engages it blowes THE FUSE!

I would replace the 4 x 4 actuating switch located top rear of transfer case. The switch has a 2 wire harness hooked to it. The same thing happened to mine. Cost me $80.00 and 30 minutes.

Posted on May 04, 2009

  • 310 Answers

SOURCE: 1995 chevy tahoe 2dr 5.7L 4x4 wont engage justs 4x4

go to the front axle and take the actaushwaiter out and gert a new one

Posted on Feb 13, 2010

ftw1952
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SOURCE: Have a P1631 DTC on my 99 chevy silverado. I know

Here is a website that a free manual can be down loaded for your vehicle


http://ezinearticles.com/?Find-the-Free-Auto-Repair-Manual-You-Need-Online&id=92717

Posted on May 01, 2010

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SOURCE: 1987 s10 chevy truck 4x4 not engaging

By the way, if that happens again (Same thing happened to me) It was inside the front diff. That vacuum actuator that sits on the passenger side that has a vacuum hose going up to it has a built in cable that plugs into the front diff. There are little springs that go bad and there is no tension on the cable. It retracts but doesn't engage the axle.

It's 3 bolts, then pry it open just enough to get access to the spring that holds the cable together. ;) That's how I fixed my problem permanently

Posted on Dec 02, 2010

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http://ezinearticles.com/?Find-the-Free-Auto-Repair-Manual-You-Need-Online&id=92717

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