GMC 2010 T-Series, Owner'S Manual

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Engine Fan Breakage
{
WARNING:
Changing the Fan Drive Ratio or Engine
Governed Speed:
If you change the fan drive ratio or increase the
governed speed of the engine, you might increase
stress and the fan could eventually fail. If the fan
breaks apart while rotating, pieces can cause
severe injury to anyone
— such as a service
technician — who is nearby. And, of course, the
pieces can severely damage the vehicle. Do not
change the fan drive ratio or increase the
governed speed of the vehicle without getting the
necessary information from your dealer/retailer.
(Continued)
WARNING: (Continued)
Winter Fronts, Grille Covers, or Obstructions:
Winter Fronts, grille covers, or other add-on
equipment causing obstructions in front of or
behind the fan should not be used on this vehicle.
If this causes the fan to eventually break apart
while rotating, the pieces can cause severe injury
to anyone nearby, such as a service technician
working on the engine, and, of course, the pieces
can severely damage the vehicle.
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