2001 GMC Sierra 1500 Pickup Owner's Manual - Page 355

2001 GMC Sierra 1500 Pickup Manual

Page 355 highlights

Noise Control System The following information relates to compliance with federal noise emission standards for vehicles with a Gross Vehicle Weight Rating (GVWR) of more than 10,000 lbs. (4 536 kg). The Maintenance Schedule provides information on maintaining the noise control system to minimize degradation of the noise emission control system during the life of your vehicle. The noise control system warranty is given in your warranty booklet. These standards apply only to vehicles sold in the United States. Among those acts presumed to constitute tampering are the acts listed below. Insulation: D Removal of the noise shields or any underhood insulation. Engine: D Removal or rendering engine speed governor Fan and Drive: (if equipped) inoperative so as to allow engine speed to exceed manufacturer specifications. Tampering With Noise Control System Prohibited 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. D Removal of fan clutch (if equipped) or rendering clutch inoperative. D Removal of the fan shroud (if equipped). Air Intake: D Removal of the air cleaner silencer. D Reversing the air cleaner cover. Exhaust: D Removal of the muffler and/or resonator. D Removal of the exhaust pipes and exhaust pipe clamps. 6-13

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