Current and Past Models

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

ORDER TOLL FREE:

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:

    Weight of the Trailer
    How heavy can a trailer safely be? It should never weigh more than 450 kg (1,000 lbs). But even that can be too heavy. Speed, altitude, road grades, outside temperature, special equipment, ...

    Engine Coolant Heater
    Vehicles with the engine coolant heater can use this option in cold weather conditions at or below −18°C (0°F) for easier starting and better fuel economy during engine warm-up. Plug i ...

    Trans (Transmission) Temp (Temperature) (CTS-V Only)
    This display shows the transmission fluid temperature in either degrees Celsius (°C) or degrees Fahrenheit (°F). ...