1992 GMC K2500 Suburban Engine: 5.7L V8; Reverse Rotation|Standard Duty Thermal Fan Clutch|w/ 3.08 or 3.42 Rear Axle Ratio|w/o AC;. 1993 GMC K2500 Suburban Engine: 5.7L V8; Reverse Rotation|Standard Duty Thermal Fan Clutch|w/ 3.08 or 3.42 Rear Axle Ratio|w/o AC;.