Question about 1999 Chevrolet Tahoe

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Service 4wd dash light comes on when I go into auto 4 and will switch back to 2wd until I shut the engine off.

I have a 99 chevy tahoe 4X4 5.7. My service 4wd dash light comes on when I put my truck in auto 4. I drive about 150 - 200 feet and the light comes on and will not switch back into 2wd. I have to shut the engine off and then start it holding in the 2wd button. It also seems to go into 4wd in auto 4 with out any sense of slipping or spinning of the tires. I replaced the transfer case 1 yr ago and always thought that after the replacement the 4wd was mucked up. Could it be the transfer case? I have had it looked at 2 or 4 times and everything looks great. HELP!

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  • Anonymous Mar 30, 2014

    4 button switch on dash wont light up anymore after i replaced transfer case.replaced tccm and encoder motor still nothing switch worked up till first transfer case broke service 4wd light dont come on either

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  • Chevrolet Master
  • 14,036 Answers

Sound like problems in transfer case shift module.

Posted on May 22, 2009

  • James Peterson Nov 30, 2011

    Try replacing the dash mounted selector switch. Chevy has had problems with their soldering over the years (ie. the wiper control module). I have a 98 Tahoe that was doing the same exact thing, replaced the dash selector switch and all is good in the world.

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