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
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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:
Tire Rotation
If the vehicle has non-directional
tires, they should be rotated
every 12 000 km/7,500 mi.
See Maintenance Schedule.
Tires are rotated to achieve a
uniform wear for all tires.
The first rotat ...
Tire Pressure for High-Speed Operation
WARNING
Driving at high speeds, 160 km/h (100 mph) or higher, puts an additional strain
on tires. Sustained high-speed driving causes excessive heat buildup and can cause
sudden tire failure ...
Safety Belts
Refer to the following sections for important information on how to use
safety belts properly:
- Safety Belts
- How to Wear Safety Belts Properly
- Lap-Shoulder Belt
- Lower Anchors and Tet ...






