Electric Brake Control Wiring Provisions
These wiring provisions are included with the vehicle as part of the trailer wiring package. These provisions are for an electric brake controller. The instrument panel contains blunt cut wires behind the steering column for the trailer brake controller. The harness contains the following wires:
• Dark Blue: Brake Signal to Trailer Connector
• Red/Black: Battery
• Light Blue/White: Brake Switch
• White: Ground
The harness should be installed by your dealer or a qualified service center.
If the vehicle is equipped with an Integrated Trailer Brake Control (ITBC) System, the blunt cuts exist, but are not connected further in the harness. If an aftermarket trailer brake controller is installed, the ITBC must be disconnected. Do not power both ITBC and aftermarket controllers to control the trailer brakes at the same time.
See also:
Roadside Assistance Program
U.S.: 1-888-881-3302
TTY Users (U.S.): 1-888-889-2438
Canada: 1-800-268-6800
Mexico: 01-800-466-0801
As the owner of a new GMC, you are automatically enrolled in the Roadside Assistance program.
...
Maintenance When Trailer Towing
The vehicle needs service more often when pulling a trailer. See this manual's
Maintenance Schedule or Index for more information. Things that are especially important
in trailer operation are ...
Capacities and Specifications
The following approximate capacities are given in metric and English
conversions. See Recommended Fluids and Lubricants on page 11‑12 for more information.
If the vehicle has a diesel engine, ...