Suburban

CHEVROLET SUBURBAN
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TJONES
  • MEMBER
  • 1 POST
I have a Chevy 2005 Suburban, 1500. The 2-wheel and 4-wheel drive system is faulty. When we start the car we never know if the light for the 2-wheel, 4-wheel high, or 4-wheel low will come on. And, once the car is started and a light is on, we cannot change the drive. For example, if after we start the truck the light lands on 2-wheel, we cannot change to 4-wheel by pressing the 4-wheel button. In other words, it stays in whatever drive it is in when we start the car.

thanks for your answer...
Feb 7, 2007 at 4:34 AM
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CHEVY22
  • ✓Experienced Mechanic
  • 1,375 POSTS
there are several components to the system ,
1 the switch itself
2 tccm transfer case control module
3 tcem transfer case encoder motor
the tccm is serial device so a reguar code reader cant check it , ive seen every part fail , not all at once , best advise is have it scanned for codes (the tccm) and see what happens
you can replace the switch and rule that out if you want , they are 25-30 bucks and install in minutes , but i am a big fan on diagnosing the problem and fixing it right the first time ,
one question i would like to ask is , when you start the vehicle do all of the lights on the switch blink then go out and one stays lit??

thanks
jim
Feb 17, 2007 at 10:28 AM
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