1982 GMC P2500 Engine: 6.2L V8; Standard Rotation; Severe Duty Thermal Fan Clutch;. 1983 GMC P2500 Engine: 6.2L V8; Standard Rotation; Severe Duty Thermal Fan Clutch;. 1984 GMC P2500 Engine: 6.2L V8; Standard Rotation; Severe Duty Thermal Fan Clutch;.