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 Volkswagen Golf has front wheel drive.
The 2002 Toyota Tacoma has rear wheel drive.
The 2002 Chevrolet Camaro has rear wheel drive.
The 2002 Nissan Altima has front wheel drive.
The 2002 Toyota Highlander has front wheel drive.
The 2002 Toyota Camry has front wheel drive.
The 2002 Volkswagen Passat has front wheel drive.
The 2002 Kia Optima has front wheel drive.
The 2002 Ford Focus has front wheel drive.
The 2002 Honda Insight has front wheel drive.
The 2002 Kia Sedona has front wheel drive.
The 2002 Dodge Durango has rear wheel drive.