Fits for D581 (12558693) Truck Coil, D585 (10457730-Delco, 19005218-Delphi) Truck, D513A (12570616) LS2/LS7 First Design Coil, D514A (12573190) LS2/LS7 Second Design, D510C (12570616) LS3, Does NOT fit for D580 LS1 Coils
Replacement Ignition Coil Harness for the CHEVY GMC CADILLAC 4.8L 5.3L 6.0L 8.1L LQ9 LQ4 LS2 LS7 LSX and the coil packs found on most Trucks.
When installing make note of the color on the second wire on the coil connector. The connector with the Purple wire goes to coil that fires cylinder number 1 or 8, Red wire goes to 2 or 7, Blue wire goes to 3 or 6, and Green goes to 4 or 5.