Review on 🔥 ACDelco D581 GM Original Equipment Ignition Coil - Enhanced Performance and Reliability for Optimum Engine Ignition by Charles Thomas

The packaging was pretty poor (8 spools in a box that could fit 20+) with no packing material to keep them from bouncing and it showed on the spool boxes. They are coils so I wasn't overly concerned about damaging them and there weren't any so I installed them on my 2004 Avalanche 2500 with the 8.1 liter engine and they worked as expected. The error I had the generated code P0171 went away and the truck is more responsive. I haven't seen anything to suggest they aren't genuine ACDELCO parts made in Mexico like the ones that were removed from the truck. The packaging was poor but they worked without any issues and that's the important part for me.