GM has issued a service bulletin for certain units of the Cadillac Escalade due to a problem related to the brake control switch.
The problem: affected vehicles equipped with the Integrated Trailer Brake (RPO code JL1) may have a “Service Trailer Brake” message when connecting a trailer with an electric brake to their vehicle. Additionally, this warning may light up when the driver attempts to use the manual apply slider on switch or depress the brake pedal while towing.
The fix: certified GM technicians will be instructed the unit and replace the Trailer Brake Control Switch as necessary. It will take GM techs roughly an hour-and-a-half to perform the fix.
Affected components: Trailer Brake Control Switch.
Affected vehicles: (including all affected GM models):
- 2022 Cadillac Escalade
- 2023 Cadillac Escalade
- 2022 Cadillac Escalade ESV
- 2023 Cadillac Escalade ESV
- 2022 Chevy Silverado 1500
- 2023 Chevy Silverado 1500
- 2022 Chevy Suburban
- 2023 Chevy Suburban
- 2022 Chevy Tahoe
- 2023 Chevy Tahoe
- 2022 GMC Sierra 1500
- 2023 GMC Sierra 1500
- 2022 GMC Yukon
- 2023 GMC Yukon
- 2022 GMC Yukon XL
- 2023 GMC Yukon XL
- 2022 GMC Hummer EV
Number of affected vehicles: it’s currently unclear how many vehicles are affected by the service bulletin.
Owners should: wait to be contacted by GM or schedule an appointment with their local Cadillac dealership to have the service bulletin performed. Notably, this Customer Service Program will only be in effect until March 31st, 2025.
Contacts:
- GM Customer Satisfaction Program Number: N222384930
- Cadillac Customer Service: 1-800-333-4223
It’s worth noting that the vast majority of vehicles affected by this service bulletin ride on the GM T1 platform, with the GMC Hummer EV being the only exception. GM’s all-electric supertruck rides on the GM BT1 platform, and utilizes Ultium battery and Ultium Drive motors for motivation as opposed to the ICE engines used by the other vehicles.
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Comments
I highly doubt it is just the switch. After three months and no fix by GM, I traded back my 2022 Silverado 1500 for a 2023. GM I was told knew about this issue since September 2022. The problem was worse with higher braking pressure but could also be triggered by using the manual brake controller switch. I suspect the problem was worse with tandem axel brakes with a higher load. A great GM technician found bad grounds off the main ECM which helped the problem, but it still dropped out unexpectedly. If it was just a switch, the problem would have been solved quickly. The new 2023 works fine for towing.
Least of my problems! My escalade has been at the dealer for over 3 weeks with electronic issues such as no blind spot system, no front collision avoidance system, parking brake needs to be released every time you go into drive or reverse, check engine light is on. There is more I just don’t remember. Cadillac field tech had another front camera module ordered, after 1 week still waiting. Through all this Cadillac sent a $100.00 service voucher. Not what I expected from Cadillac!