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K20rookie · 10-02-2015, 11:15 AM

I had a similar problem on my 05 silverado and chased it for weeks. It ended up being a loose connector on the transfer case. The clip had broken off and the plug wasn't making full contact. Sounds simple, but might be worth checking if that hasn't been done already.

10-02-2015, 11:15 AM	#11
K20rookie Registered User Join Date: May 2015 Location: AZ Posts: 75	Re: Awful time trying to figure out WHAT is wrong with 4x4 on '99 Suburban... I had a similar problem on my 05 silverado and chased it for weeks. It ended up being a loose connector on the transfer case. The clip had broken off and the plug wasn't making full contact. Sounds simple, but might be worth checking if that hasn't been done already.