SAFETY AND COMPLIANCE
Peterbilt Motors Company viii
Trucks equipped with a “Vehicle Emission Control Information” door label are certified to comply with United States
Greenhouse Gas (GHG) regulations. Original tires may be substituted provided the new tires possess an equal to or lower
Coefficient of rolling resistance (Crr).
The Emission Controls shown in Figure 2-3 may be indicated on the label.
Figure 2-3. Incomplete Vehicle Certification Document
Noise and Emissions Requirements
NOTE: This truck may be equipped with a Diesel Particulate Filter (DPF) muffler unit in order to meet
both noise and exhaust emissions requirements. Removal or tampering with the DPF muffler will not
improve engine performance. Also tampering with the exhaust system is against the rules that are
established by the U.S. Code of Federal Regulations and Environment Canada Regulations. The
DPF muffler may only be replaced with an approved part.
NOTE: 2007/10/13 emissions engines are integrated with particulate filters for 2007/10/13 EPA
certification. The particulate filter assembly may consist of one or more of the following components: a
diesel oxidation catalyst, a diesel particulate filter, temperature sensors, differential pressure sensor, and
exhaust silencing components integrated into a modular housing. Body Builders must not modify or
relocate this assembly or any components associated with it. It is also the case that there should not be
any modifications made to the exhaust piping from turbo outlet to aftertreatment inlet.
