Suburban

Tiny
TJONES
  • MEMBER
  • CHEVROLET SUBURBAN
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.
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Wednesday, February 7th, 2007 AT 12:34 PM

1 Reply

Tiny
CHEVYII
  • MEMBER
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
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Saturday, February 17th, 2007 AT 6:28 PM

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