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Home >> GMC >> 1983 >> Forward Control 6.2 J, Standard >> Repair and Diagnosis >> Engine Performance >> Emissions >> Emission Component Identification >> Emission Applications >> Notes

Emission Applications: Notes

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Several systems are used to control emission of pollutants. System usage depends on model, engine and transmission combination. Each system is designed to control a particular vehicle emission.

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