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 ...

Using the Tire Sealant and Compressor Kit without Sealant to Inflate a Tire (Not Punctured)
To use the air compressor to inflate a tire with air only and not sealant: If a tire goes flat, avoid further tire and wheel damage by driving slowly to a level place. Turn on the hazard warning fl ...

Shutting the Engine Off After a Remote Start
To manually shut off a remote start: • Aim the RKE transmitter at the vehicle and press until the parking lamps turn off. • Turn on the hazard warning flashers. • Turn the ignition switch on ...