Okay, so i have a 2007 tb 4x4 without the DIC and for about the past month the service stabilitrac lights (both the slippery when wet symbol with wrench light and the stabilitrac off light) have been coming on (solid) while driving. In the owners manual it states this this means the stabilitrac system is disabled due to a system fault. When i turn the vehicle off and restart it, they are gone but still are periodically coming back on. There is no certain condition that I have noticed when they come on (happens when both in 2 hi or auto 4wd) but i have had the car in with the dealer where I purchased it from 3 times and another chevy dealer once. Here are the service notes from the first service visit: SCAN CHECK COMPUTER. HISTORY CODE C0455, STEERING WHEEL POSITION SENSOR. RUN SYSTEM CHECKS, REPROGRAM EBCM WITH UPDATED SOFTWARE CALIBRATIONS, TEST DROVE/RECHECKED. UNABLE TO DUPLICATE CONCERN. ABS/STABILITRAC SYSTEMS OPERATING AS DESIGNED. Well after that visit, the issue is still occurring periodically and i have brought the vehicle back to that dealer twice and another dealer once and they are not duplicating the issue (of course) and they stated that there are no history codes in the computer when they scan it. Also there have been times when im driving and i break traction (snow and ice on ground where i live) the rear wheels act like they are locked and will bark/hop when making turns for a few minutes after the wheel slippage (even when not set to 4wd). In the loaner vehicle i was given by the dealer (also a 2007 TB) i have not duplicated the rear wheel locking issue under the same driving conditions. This is also not being duplicated on my TB by the techs because both issues are only happening occasionally and seem to only happen when i'm driving the car. Am i going crazy or does anyone else have any idea what is going on with my TB? I cant keep on wasting my time bringing it back and forth to the dealer and having them say that nothing is wrong. Whenever the warning lights come on, I dont have the convienence of driving straight to the dealer to show them the issue...does my car just hate me? Tonight when the warning lights came on, i drove straight to an auto parts store and left it running so the warning lights could not reset and had them plug up a code reader which did not read any kind of an error code. Can anybody shed some light on this situation? Thanks.