See also:

Customer Assistance Offices (U.S. and Canada)
GMC encourages customers to call the toll-free number for assistance. However, if a customer wishes to write or e-mail GMC, the letter should be addressed to: United States GMC Customer Assistance ...

Starting the Engine Using Remote Start
To start the vehicle: 1. Aim the RKE transmitter at the vehicle. 2. Press and release on the RKE transmitter. 3. Immediately after completing Step 2, press and hold until the parking lamps flash. ...

Emissions Inspection and Maintenance Programs
Some local governments may have programs to inspect the on-vehicle emission control equipment. For the inspection, the emission system test equipment is connected to the vehicle’s Data Link Connect ...