Current and Past Models

Technical Service Bulletins and Manuals are available for current and past model GM vehicles.

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1-800-551-4123 Monday – Friday 8:00 AM – 6:00 PM Eastern Time

For Credit Card Orders Only (VISA-MasterCard-Discover), visit Helm, Inc. at: www.helminc.com.

Or write to:

Helm, Incorporated
Attention: Customer Service
47911 Halyard Drive
Plymouth, MI 48170

Prices are subject to change without notice and without incurring obligation. Allow ample time for delivery.

All listed prices are quoted in U.S.

funds. Make checks payable in U.S. funds.

    See also:

    Lockout Deterrent
    Lockout deterrent decreases the chances that the keys may be accidentally locked in the vehicle. When door locking is requested by pressing on the instrument panel or front door panels, or the RK ...

    Speed and Curve Assist
    This display will show the speed limit or the advised speed as determined by the information provided by the navigation system. The map database loaded in the navigation system may need to be upda ...

    Advanced safety features based on 'control and alert' strategy
    The Cadillac XTS' technology fundamentally supports a suite of advanced safety features, based on a "control and alert" strategy that extends the vision around the vehicle. It helps driv ...