Your cart is empty.
Your cart is empty.Michigan Motorsports GM Ignition Coil Harness- Replacement for GM 89017477 Choose Quantity 2 for a full set Direct 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. The stock harness often get hard and brittle over time. Replace your harness with our new harness kit. Fitment Chart- D581 (12558693) Truck Coil D585 (10457730-Delco, 19005218-Delphi) Truck Coil D513A (12570616) LS2/LS7 First Design D514A (12573190) LS2/LS7 Second Design MSD 8287 Coils D510C (12570616) LS3 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.
Jeffrey pereira
Reviewed in the United States on March 8, 2024
They honestly sell top quality products with exact fit to any ls/lt motor
Gordon
Reviewed in the United States on March 6, 2024
I ls swapped my car and used these rather than the ugly factory coil harnesses. Much cleaner and no broken plugs and rotted looms like the factory harness.
Mike Ferreira
Reviewed in Canada on December 8, 2022
Was having coil power issues using MSD coils on my LS3 powered Silverado and came across this harness that’s helped fix some of the glitches I was encountering… would recommend!
Laird J. Kayler
Reviewed in the United States on June 22, 2021
Nice wire set for LS. Good quality and fits perfect. Works great too.
Kurt from Iowa
Reviewed in the United States on December 16, 2021
Not pleased here. The pigtail ends at the coil pack side are too large to fit any of the coil packs in my collection. Didn't fit truck coils, didn't fit LS3 coils.... My GM harnesses on my truck fit everything fine, so this appears to be a manufacturing flaw on these cheap harnesses. Mine went into the trash unfortunately, they plug in just as well to the trash can as they did with the LS coil packs.
Arch
Reviewed in Canada on January 30, 2021
Well it started out there is suppose to be 2 in a package and for some reason I only got one, contacted Michigan Motor sports right away once I opened it, dealt with a guy named Ethan and right away he was helpful on getting me a new set was amazed and blessed that they were awesome to deal with would recommend 100 percent and the wires are also perfect would definitely by again.
Howard Camp
Reviewed in the United States on November 23, 2020
Don't listen to the bad reviews. These work fine you just have to know what you are doing and make sure you connect the each connector to the correct coil. If you're not sure which goes where then do some research and figure it out.
Elias Soto
Reviewed in the United States on June 15, 2019
Overall the product is great. Clean packaging and clean assembly. Assembled well. I'm only giving four stars because I had a question about the placement of the coil packs and I sent an email to Michigan Motorsports and they never replied back to me. Fortunately Google and ls1tech was able to help out but they essentially have no customer service because there's no number to call and they don't respond to emails. if you don't need help on installing the product then you should be fine. it is a good product just no customer service
John Fletcher
Reviewed in the United States on March 25, 2019
Although the connections are the same as my 2004 suburban 5.3 flex, there is no marking of where the connectors go (which cylinder they belong to). The only compatibility chart I could find was the engine model, ie: ls1, ls2 and so on). Since it was a used vehicle, I went by connector shape and size. Unfortunately, after trying each harness plug to each coil, I got worse engine performance than the old harness. Keeping them purely for spare connectors. No blame on the seller except for compatibility chart. Be great if they were more specific.
Mr. W
Reviewed in the United States on March 16, 2019
2005 Silverado 2500HD 6.0L. Really well put together harness. The extra sheath on the loom is classy. A couple of suggestions for those of you installing them. First, connect the harness and test it with the coil bracket still on the engine. Once successful, then take off the bracket, remove the old harness and route your new harness wires. Second, they are not labelled as to what goes where. You'll be able to tell by the length of the wire from the main connector to the coil connector. Third, play with the wire routing since the loom sheath causes the the wires have a larger diameter than OEM. It will route slightly different than the OEM ones. Then zip tie it to the OEM wire guides. You have to be careful not block your bolt holes when routing and not to pinch your wires when bolting the bracket back on. Fourth, use a little dielectric grease on the rubber ring to make insertion easier and to protect them from corrosion. Fifth, the retainer latches on these are not as flexible as OEM and the plugs are snug. The retainer latches are more brittle and can snap. So be gentle and keep a slight inward pressure on the retainer latch as you insert the plug. Sixth, either harness can go on either side of the engine. They are identical. Finally, the wire colors don't match OEM. Each coil connector has the same color wires. Just remember that if you ever have to do electrical diagnostics because you won't be able to use wire colors to identify circuits.I'm satisfied. It's a nicely made harness and working fine after about 250 miles.
Recommended Products
