Service bulletin PIT5509H
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10201253 |
| Published by NHTSA | 2021-09-13 |
| Manufacturer's number | PIT5509H |
| Manufacturer's date | 2021-07-22 |
| NHTSA component | AIR BAGS; TRAILER HITCHES; ELECTRICAL SYSTEM |
NHTSA's summary
This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System? message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system that is being used. The Chassis Control Module can be sensitive to a variety of trailer wiring issues. The technician will need to make a trailer tester using Electric Trailer Brake Magnets and 7-way trailer connector to determine if it is a vehicle or trailer issue. If the concern is not duplicated with the tester installed, the vehicle is operating correctly and the focus should be on the trailer wiring or 7 way connector.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Air bags, Electrical system, Trailer hitch
Trouble codes named
C1114
| CADILLAC ESCALADE ESV | 2021, 2022 |
|---|---|
| CHEVROLET COLORADO | 2015, 2016, 2017, 2018, 2019, 2020, 2021 |
| CHEVROLET SILVERADO 1500 | 2014 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 1500 | 2017, 2018, 2019 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 1500 | 2021 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 2500 | 2015, 2016 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 2500 | 2020 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 2500 | 2022 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SUBURBAN | 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| CHEVROLET TAHOE | 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| GMC CANYON | 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| GMC SIERRA 1500 | 2014 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA 1500 | 2017, 2018, 2019 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA 1500 | 2021, 2022 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA 2500 | 2015, 2016 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA 2500 | 2020 (the catalog's model; the bulletin names a series or trim of it) |
| GMC YUKON DENALI | 2015, 2016, 2017, 2018, 2019 (the catalog's model; the bulletin names a series or trim of it) |
| GMC YUKON XL | 2020, 2021, 2022 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 26V611000 | 2026-09-24. AIR BAGS:SIDE/WINDOW:CURTAIN:INFLATOR |
|---|---|
| 2026245 | 2026-05-21. Airbag |
| 26V325000 | 2026-05-21. AIR BAGS |
| 2026129 | 2026-03-19. Airbag |
| 26V166000 | 2026-03-19. AIR BAGS |
| 25V432000 | 2025-06-26. AIR BAGS |
| 2025352 | 2025-06-25. Airbag |
| 2024595 | 2024-10-10. Airbag |
| 24V756000 | 2024-10-10. AIR BAGS:SIDE/WINDOW:CURTAIN:INFLATOR |
| 2024294 | 2024-05-24. Electrical |
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| N252515590 | 2026-01-27. Service campaign. Certain vehicles listed above, may have a condition in which the body-to-chassis ground strap may be corroded. Dealers will replace the ground strap. |
|---|---|
| 23-NA-170 | 2025-10-25. Service bulletin. This bulletin advises the tech to inspect deeper into what may be to main cause of an engine failure. |
| 23-NA-201 | 2025-10-21. Service bulletin. This service bulletin advises the technician of a possible loose ground that may be causing customer concerns of Loss of Steering Assist and/or Loss of Brake Assist and Malfunction Indicator Lamp (MIL) Illuminated. |
| 18-NA-180 | 2025-10-16. Service bulletin. This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information. |
| 22-NA-161 | 2025-09-27. Service bulletin. This informational bulletin provides information for dealers/technicians on power folding mirrors do not fold at the same speed. |
| 18-NA-180 | 2025-09-26. Service bulletin. This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information. |
| 25-NA-101 | 2025-06-26. Service bulletin. This service bulletin provides information on the restraint warning lamp being illuminated and the correction to this by replacing the passenger presence module. |
| 24-NA-229 | 2025-06-03. Service bulletin. This bulletin provides a procedure on how to check for a battery drain utilizing the Picoscope and how to measure the load on the system that may be causing a drain. |
| 25-NA-087 | 2025-05-02. Service bulletin. This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs. |
| 21-NA-139 | 2025-05-01. Service bulletin. This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3055 Set. |