GMC 2007 Savana - Manual (Page 333)

Federal law prohibits the following acts or the
causing thereof:
1. The removal or rendering inoperative by any
person, other than for purposes of
maintenance, repair or replacement, of any
device or element of design incorporated into
any new vehicle for the purpose of noise
control, prior to its sale or delivery to
the ultimate purchaser or while it is in use; or
2. The use of the vehicle after such device or
element of design has been removed or
rendered inoperative by any person.
Among those acts presumed to constitute
tampering are the acts listed below.
Insulation:
• Removal of the noise shields or any
underhood insulation.
Engine:
• Removal or rendering engine speed governor,
if the vehicle has one, inoperative so as to
allow engine speed to exceed manufacturer
specifications.
Fan and Drive:
• Removal of fan clutch, if the vehicle has one,
or rendering clutch inoperative.
• Removal of the fan shroud, if the vehicle
has one.
Air Intake:
• Removal of the air cleaner silencer.
• Modification of the air cleaner.
Exhaust:
• Removal of the muffler and/or resonator.
• Removal of the exhaust pipes and exhaust
pipe clamps.
Fuel Operated Heater (FOH) — Diesel
Engine:
• Removal of the muffler.
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