# '98' Tahoe 4WD intermittent on/off

**URL:** <https://community.cartalk.com/t/98-tahoe-4wd-intermittent-on-off/61971>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, tahoe\
**Created:** [February 27, 2011, 11:58pm UTC](https://community.cartalk.com/t/98-tahoe-4wd-intermittent-on-off/61971 "2011-02-27T23:58:42Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Dave\_Parkhurst](https://avatars.discourse-cdn.com/v4/letter/d/3ab097/32.png) [@Dave\_Parkhurst](https://community.cartalk.com/u/Dave_Parkhurst)\
**Post date:** [February 27, 2011, 11:58pm UTC](https://community.cartalk.com/t/98-tahoe-4wd-intermittent-on-off/61971/1 "2011-02-27T23:58:42Z")

</div>

I recently was towing a trailer & the “Service 4WD” warning light came on & the indicator switches on the lower mid-dash wouldn’t show what gear it was in… I was able to continue driving though. It seems it ‘defaulted’ to 2WD. When started up again later the service light went out & once again it was in 4WD. It ran fine, turned fine & drove fine on ice & snow. However since then the “Service 4WD” warning light has come on & off several times as I stop & start the truck here & there. It kind of has a mind of its own. I’ve had some “feedback” that it’s going to cost me “a couple thousand” to fix it - to - “it may just be a module or sensor”. I’d like to get more suggestions before I go drop the money for some diagnostic comparisons.