TUPARTSRound Ignition Coils Fit for Chevrolet for GMC for Buick for Cadillac for Silverado 1500 for Suburban for Sierra V8 4.8L 5.3L 6L 1999-2007 Replacement for OE 12563293 D585 C1251-8 Coil Packs

Once you've put on all the coil packs on a hard to reach V8 in a large truck, you really don't feel like packing them all back up and shipping them back for a refund, though that's what I *ought* to do.After putting on one bank (one side of 4 cylinders) the engine ran better, but when I put bank 2 on (passenger side 4 cylinders) one of them was causing a misfire. I used a BT engine code reader via OBDII port and it said cylinder 2. I put the old coil back on that cylinder and the engine ran fine. I checked the connections repeatedly trying to resolve the misfire but the only thing that 'fixed' it was putting the old coil back on. Faulty coil is almost certainly the cause.Cannot recommend a coil set where one of them is bad right out of the box. I'm keeping my old coils just in case these go bad, also. Next time I guess will have to bite the bullet and get the Delco or similar OEM brand.

Easy to install

At first I didn't know if they were the right size but then I looked at the picture and read some details so it and it fits perfectly I think you so much the price was great I loved it.

We can't even order one ignition coil locally for the price of this entire set. Good, quality product, fast shipping, and unbeatable price. Work just as well as those from your local parts store, at a fraction of the price!

I had bad ignition coils so I changed them all. They are an exact fit and works perfectly

So far so good

Trash. Multiple cylinder misfire within 100 miles.

Omg. Buy this sh blank blank. I just bought this truck a month ago an it ran rough. But theae coil packs... My God they brought my truck to life💪💪💪