4 wheel drive won't engage on 2003 Chevrolet Silverado 3500

I screwed up and drove on the interstate at 70 MPH on dry pavement for several miles while in 4 wheel drive without realizing it. I knew my truck was making a strange noise but didn't click that it was in 4x4. After about 10 miles the noise stopped. now when I select 4HI the selector lights up as if it's engaged but it doesn't lock in or even try. Is there by chance a safety feature built into the transfer case, like a fuse or an easy reset or have I ruined my 4x4 capabilities? I hate to think that I have to take the truck in to get the transfer case repaired. Please help!!!

by in Ames, IA on January 11, 2010
2 answers 1 comment
ANSWER by on January 12, 2010
Go to this site https://www.drivetrain.com/parts_catalog/accessories/posi_lok_front_differential.html they have a trouble shooting guide
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COMMENT by on January 13, 2010
The troubleshooting guide only pertains to Chevy's up to 1998
ANSWER by on September 11, 2013
Transfer case is possibly damaged going that fast in 4WD.. Have it checked.