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
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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:
Locking Rear Axle
Vehicles with a locking rear axle can give more traction on snow, mud, ice, sand,
or gravel. It works like a standard axle most of the time, but when traction is
low, this feature will allow the r ...
Safety Belt Use During Pregnancy
Safety belts work for everyone,
including pregnant women. Like all
occupants, they are more likely to
be seriously injured if they do not
wear safety belts.
A pregnant woman should wear a
...
Driver Information Center (DIC)
The DIC display is located at the
bottom of the instrument panel
cluster. It shows the status of many
vehicle systems and enables
access to the personalization menu.
The DIC buttons are loc ...