Current and Past Models
Technical Service Bulletins and Manuals are available for current and past model GM vehicles.
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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.
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See also:
If a Crash Occurs
If there has been an injury, call emergency services for help. Do not leave the
scene of a crash until all matters have been taken care of.
Move the vehicle only if its position puts you in danger, ...
Why Safety Belts Work
When riding in a vehicle, you travel
as fast as the vehicle does. If the
vehicle stops suddenly, you keep
going until something stops you.
It could be the windshield, the
instrument panel, ...
Manual Operation
(Fan Control): Press the up or down
arrows to increase or decrease the fan speed Pressing this button when the system
is off will turn the system on.
Pressing either arrow while using automatic ...






