Oldsmobile Bravada smart trac engeges when turning at speeds

as with any other warning light on your dash......get the trouble codes read and then you'll have a starting point. Don't ask us to guess which of the more than 800 possible codes is stored in your computer.

At 100,000 miles, you are driving on bad wheel bearings. They are not too bad to replace, it is a wheel bearing assembly. Bolts on . You will need to remove the spindle nuts, the brakes and rotors, and unplug your abs cable from under the hood. It should take about 1 hour per side if you haven't done it before, and the bearings should be around $120.00 each.

does the engine run badly while idling at 5 miles an hour?

Chains in transfer case are really bad to wear out. Any strange noises?

Clean or replace EGR valve..........Hope this help.

I have 2K bravada. Make sure you have serviced your transfer case with the "blue" GM Auto-trac II fluid. The "encoder" motor is a common failure item also. Unplugging it at the transfer case should cause the "service smart trac" light on dash to appear. This tells you that probably the encoder controller is good. Only buy the GM/Delphi/AC Delco motor, or you'll be changing it often. Try "thepartsladi" on eBay!

Probably the transfer case encoder motor. Unplugging it at the wiring harness should make the "service awd or smart trac" light come on. This will tell you the awd controller module is probably OK. Common failure item to Bravada's. Try "thepartsladi" eBay store for lowest price motor, beware aftermarket!!! Also make sure transfer case fluid is "blue" GM Auto-Trak II only! If not bllue when checking change twice after driving for a week with blue fluid.

If youre talking about wheel hop when turning at slow speeds with only the info you have provided I would guess it has smart track AWD and this is normal, How ever if you have push button 4x4 controls your front drive axle could be locked in, in that case have a garage check it out...

drain the transfer case and check for metal particles in the fluid, there also may be debris bigger than that, try the fluid change in any event then if that doesn't do the trick you will have to overhaul the transfer case, this is a standard transfer case used by light duty trucks and SUV's based on a truck chassis, not the viscious drive type used bt passenger cars like Suburu

Smart trac is automatic. the transfer case is always in 4x4. if it is not working i woild suggest a driveline shop. probably needs a transfer case. and the gague not working? is it not on at all or just not responding to the fuel level?