Technical Service Bulletin PIT5509G — 2018 GMC YUKON DENALI
ELECTRICAL SYSTEM
Bulletin Details
| TSB ID | PIT5509G |
| Manufacturer | |
| Vehicle | 2018 GMC YUKON DENALI |
| Component | ELECTRICAL SYSTEM |
| Communication Date |
Bulletin 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.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.
Other TSBs for the 2018 GMC YUKON DENALI
22-NA-244
ELECTRICAL SYSTEM
PIT5391F
EXTERIOR LIGHTING
PIT5564C
EQUIPMENT:ELECTRICAL
PIP5573C
POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER
PIT5509F
ELECTRICAL SYSTEM
PIT5614
EQUIPMENT:APPLIANCE:AIR CONDITIONER
PIP5179D
ENGINE
PIT5390B
EQUIPMENT:ELECTRICAL:ANTI-THEFT DEVICES
PIT5287D
SUSPENSION:FRONT:SHOCK ABSORBER
PIP5504A
POWER TRAIN