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2002 Tahoe Auto Ride ( New Twist)

bonnerwrb

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bonnerwrb New Member

bonnerwrb

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October 31, 2011 at 2:07 am I have a new twist to a auto ride problem. I have a 2002 Tahoe that I brought new in 2002. It is garage kept and only has 30,000 miles on it. Their is no rust or corrosion under the vehicle. My auto ride system works perfectly in warm weather but, as soon as the temperatures drop below 50 degrees the service auto ride warning light starts to come on. I took the vehicle to my Chevy dealer but it sat overnight and by the time they got to it the next morning the light would not come on. They said that they tested for trouble codes and the history code showed that the ESC or brain of the system was bad. I've never heard of a ESC before but I guess they meant the control module. They said it would cost $1,100.00 to fix it. After reading this forum and finding out where the control module was located, I decided to try a experiment. I hung a drop light under the vehicle as close to location where I believed the module was located. The drop light actually was inches a way from what I think was a wire junction box. It had a large covered bundle wire going up through the floor. I think this wire bundle is feeding the rear blower and the control module. Anyway the next morning was about 40 degrees and when I started the Tahoe up the compressor came on and leveled the vehicle and no warning light. I continued to do this for several days and no warning light and the system worked perfectly. I then left the drop light off one night to test to see if this was a flute. Upon start-up the warning light came on and no operation of the compressor. So for some reason the Auto Ride is affected by the temperature. 60 degrees and above it works fine and temperatures below that it starts to malfunction. I have found that when the temperatures go below 40 degrees my drop light does not provide enough heat to keep the module warm enough. My next experiment to keep things working was to turn on the back blower unit with the heat set on high. After about 5 or 10 minutes, I could turn the vehicle off then restart it, and the Auto Ride would work fine regardless of how cold it might be.

Question; How do you remove the inside back panel to get to the control module? I would like to check it for a loose or cracked connection. Does anyone have any thoughts on this? Any response would be appreciated.

Thanks Bill Bonner Alexandria, Virginia

ChevyTech77 Senior Enthusiast

ChevyTech77

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Your issue resides in that "large bundle of wires/connector that is going up through the floor" in that right rear wheel area of the truck. It is C450 or Connector 450. They are known for corrosion build up and damaged terminals. If you seperate it, you should be able to visually see the damage.

bonnerwrb New Member

bonnerwrb

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Your issue resides in that "large bundle of wires/connector that is going up through the floor" in that right rear wheel area of the truck. It is C450 or Connector 450. They are known for corrosion build up and damaged terminals. If you seperate it, you should be able to visually see the damage.

 

Thank you very much for the quick reply!! I'll separate the connector and clean the terminals. If it works I'll send you a free dinner gift card. Thanks Bill

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