I bought my Bravada 1999 AWD from an auction. 160,xxx miles. It had a missing drive shaft. I drained the transfer case fluid, filled it with GM auto Trak 2 fluid. Then installed a new drive shaft. I tested if the front wheels were turning using 4 jack stands and they move, no noise or anything. AWD works flawlessly now. However the light is still on for some reason. Anyway I can clear it so the light is gone now the AWD has been fixed?
the front wheels will always spin because there's always preload on the front driveshaft. Even if there's an AWD problem. Common failures on those AWDs is encoder motors and wheel speed sensors, but you'd have to scan the computer to be sure. Also make sure you've got the same tires all the way around. SAme inflation, same tread wear. Gear shops will actually measure the diameter with a large calipers. They need to be within 1/4"
All 4 tires a brand new and they are all the same
ok I just noticed you said it had no driveshaft. That would have destroyed the transfer case. If you're lucky, the clutches are intact, and it only needs a new encoder motor.