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Home >> GMC >> 1998 >> Forward Control 7.4 B >> Repair and Diagnosis >> Transmission >> Manual Transmission Servicing >> Lubrication >> Service Intervals >> Notes

Service Intervals: Notes

NOTE: There are 2 light truck emission control classifications: Light Duty and Heavy Duty. Light Duty refers to vehicles weighing up to 8600 lbs. (GVW); Heavy Duty refers to vehicles weighing over 8600 lbs. (GVW).
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