1988 GMC K3500 equipped with 7.4L V8 Gas OHV, 6.2L V8 Diesel OHV, 5.7L V8 Gas OHV
1
Axle Stamped ZLS, ZLT, ZLW, ZLX, ZLY, or ZB2 Only For Use w/Actuator 600-101 as Upgrade
1988 GMC K3500 equipped with 7.4L V8 Gas OHV, 6.2L V8 Diesel OHV, 5.7L V8 Gas OHV
Axle Stamped ZLS, ZLT, ZLW, ZLX, ZLY, or ZB2 Only For Use w/Actuator 600-101 as Upgrade