Evening All,
I've recently acquired a 2007 Yukon Denali (220k mi). After working through its various problems, I've taken a look to tackling it's suspension issues and run into a few set-backs. Here's the run-down:
- The Compressor functions when jumping, but will not cycle with key (The relay is working as well, I tested it).
- Both rear shocks are ruined (So I should be seeing a chassis code, correct?)
- No chassis codes from tech 2 equivalent
- When connecting with a Tech 2 equivalent, no communication at all with the chassis module, so I cannot cycle the compressor or test the system. I suspect a potential issue with the chassis module, maybe a wiring issue or perhaps a faulty module?
I have the following questions:
1): Where is the Chassis module, is it the same as the ESCM? (The module located above the spare tire)
2): How can I diagnose the Chassis module (or ESCM) to determine if it is functioning properly?
3): I'm showing both codes U0122 (Dynamics module??) and U0230 (The lift gate module). Could this relate to the chassis module or not? (The lift gate works, and automatically raises and lowers)
I would like to purchase new Z55 shocks. However, if the ESCM is not working, then I would prefer to spend the money on a passive suspension rather than the $800+ for shocks and module.
Any help figuring out the chassis module (or ESCM) would be very much appreciated.
I've recently acquired a 2007 Yukon Denali (220k mi). After working through its various problems, I've taken a look to tackling it's suspension issues and run into a few set-backs. Here's the run-down:
- The Compressor functions when jumping, but will not cycle with key (The relay is working as well, I tested it).
- Both rear shocks are ruined (So I should be seeing a chassis code, correct?)
- No chassis codes from tech 2 equivalent
- When connecting with a Tech 2 equivalent, no communication at all with the chassis module, so I cannot cycle the compressor or test the system. I suspect a potential issue with the chassis module, maybe a wiring issue or perhaps a faulty module?
I have the following questions:
1): Where is the Chassis module, is it the same as the ESCM? (The module located above the spare tire)
2): How can I diagnose the Chassis module (or ESCM) to determine if it is functioning properly?
3): I'm showing both codes U0122 (Dynamics module??) and U0230 (The lift gate module). Could this relate to the chassis module or not? (The lift gate works, and automatically raises and lowers)
I would like to purchase new Z55 shocks. However, if the ESCM is not working, then I would prefer to spend the money on a passive suspension rather than the $800+ for shocks and module.
Any help figuring out the chassis module (or ESCM) would be very much appreciated.
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