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2012 GMC Sierra 2500 HD SLE 6.0L ABS/Brake lights on
Need some help with communication fault codes! Have P0121 (loss comm. with EBCM) in Transfer case Module. Have p0137 (loss comm. with Trailer Brake module) in Body control module. Have no communication with EBCM and Trailer Brake modules, but able to commu...
FIX posted 5/9/2022
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Message Closed
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5 Replies Received
5 Replies Received
Related Documents & Media | VIN | 1GT220CG9C |
| Engine | 6.0 L / 8 cyl / FLEX |
| Trans | 6-speed Automatic (Electronic) |
| Delivery | Fuel Injection / Direct injection |
| Emissions | OBD-II Compliant |
| Symptoms | ABS/Brake Lights On |
| Occurs | Always |
Trouble Codes
| U0121 | Lost Communication With Antilock Brake System Module |
| U0137 | loss communication with Trailer brake control module |
Message Closed
Vehicle Data
2012 GMC Sierra 2500 HD SLE
| VIN | 1GT220CG9C |
| Engine | 6.0 L / 8 cyl / FLEX |
| Trans | 6-speed Automatic (Electronic) |
| Delivery | Fuel Injection / Direct injection |
| Emissions | OBD-II Compliant |
| Symptoms | ABS/Brake Lights On |
| Occurs | Always |
Trouble Codes
| U0121 | Lost Communication With Antilock Brake System Module |
| U0137 | loss communication with Trailer brake control module |
Video