Accessory Power Relay
Fits Standard Cab Pickup; 96.0" bed; 133.0" Wheelbase; SQUARE RELAY, 4 PIN; ACDELCO DIRECT SALES (ACD)or 78.0" bed; 119.0" Wheelbase; SQUARE RELAY, 4 PIN; ACDELCO DIRECT SALES (ACD)or RWD; 78.0" bed; 143.5" Wheelbase; SQUARE RELAY, 4 PIN; ACDELCO DIRECT SALES (ACD)