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EBCM Failure? - 2004 Yukon Denali XL
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Question
eaglesfan
The dash lights are on for ABS and Traction Control. The message center says Service Stability System. I took this to a dealer for diagnosis. I was told that the EBCM and the brake control module needed to be replaced for ~$1700. They said that they two aluminum modules had corroded together and they could not be separated to diagnose further so both should be replaced. They also tallied up a list of $6500 of suggested repairs and told me I should consider getting rid of the truck. I really like the vehicle and intend to keep it going. The suggestions were extreme in all cases so I was skeptical of the diagnosis on the EBCM. (ie. Every minor leak on a hose called for a new hose, etc.). I pressed for the code that was given leading to the EBCM and was told the only code was C0110.
Here is where I am so far. I am looking for advice on how to proceed. The two modules in question appear immaculate. I have not tried to separate them but it would be difficult to believe that they are seized together as I was told. The only reason to separate them would to inspect the interior but it seems unlikely that the inside could look much worse than the exterior. I have located the associated ground points nearby, cleaned them all up and verified continuity to ground (I regret not looking for continuity before cleaning them). I also verified that I have power at the appropriate points on the connector. What I lack is a code reader that will read or reset the codes. I am reluctant to return to a dealer for this as part of a trial and error process. I also don't want to guess and replace expensive components as the dealers seem all too willing to do.
If the problem was a ground and fixed would the codes - indicators self reset (seems like the answer is no).
I have seen the service manual pages on this code and it doesn't seem to show me how to know which component is failing.
I'd buy a code reader for this if I knew what to look for and could get it for a reasonable price. Most inexpensive models only manage generic emissions codes. I know if I replace the EBCM a reset and tire size programming will be required.
Any advice would be sincerely appreciated.
JTA
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