i just took my 2002 bravada into the shop and had a friend look at it and he hooked it up to the computer and said that the transfer case encoder motor was bad. its the mechanism that switches it from 2wd to awd. i will be doing it myself. its an easy fix but will set you back around 150$ its a few bolts and a plug. it mounts onto the back of your transfer case. good luck.
The 2002 Chevrolet Tahoe has rear wheel drive.
The 2002 Nissan Sentra has front wheel drive.
The 2002 Kia Optima has front wheel drive.
The 2002 Jeep Wrangler has four wheel drive.
The 2002 Toyota Corolla has front wheel drive.
The 2002 Volvo S60 has front wheel drive.
The 2002 BMW X5 has all wheel drive.
The 2002 Subaru Forester has all wheel drive.
The 2002 Honda Civic has front wheel drive.
The 2002 Audi S6 has all wheel drive.
The 2002 Volvo C70 has front wheel drive.
The 2002 Nissan Quest has front wheel drive.