CHASSIS WIRING LAMPS SPARK PLUG WIRES NOTE COMPARE WIRE LENGTH AND STYLE TO VERIFY CORRECT CYLINDER NUMBERS I I l GMO5 240 STYLE B I STYLE s 66 666 R OR AA STYLE C STYLE U OR EE STYLE T OR FF STYLE X OR CC STYLE V STYLE NN STYLE Z OR DD A I C NOTE SINGLE LETTER STYLE SPARK PLUG WIRES ARE 8MM DOUBLE LETTER STYLE SPARK PLUG WIRES ARE 7MM I SPARK PLUG WIRE IS GRAY ALL OTHER SPARK PLUG WIRES ARE BLACK SPARK PLUG WIRE IS RED ALL OTHER SPARK PLUG WIRES ARE BLACK 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52R Y 2 240 GROUP SPARK PLUG WIRE 2 REV 1 88