Emission Control System Description: Description: Notes

Several systems are used to control vehicle emissions. System usage depends on model, engine and transmission combination. Specially calibrated fuel and ignition systems and modified combustion chambers are used with these systems.

NOTE: There are 2 light duty truck emission standards classifications: Light Duty and Heavy Duty Emissions. Light Duty refers to vehicles up through 8500 lbs. GVW; Heavy Duty refers to vehicles over 8500 lbs. GVW.