I did some intense searching around for about a week for an OE glow plug harness with no luck since my truck sat in a field for about 5 years so my harness for the engine bay is all sorts of jacked up. So with no luck I said screw it. It shouldn’t be very hard to make a new one. This product is very great and fits like a glove over the glow plug connectors. Truck looks cleaner with a new harness. Definitely will recommend this product to others!