8PCS Diesel Glow Plugs 12639701 Replacement for Chevy GMC 6.6 LBZ LGH LLY LML LMM Duramax 2006-2016 Silverado Sierra 2500HD, 2007-2016 Silverado Sierra 3500HD, 2006-2016 Express Savana 2500 3500

Easy to install

They worked great for roughly 6 months and now are fowling out

check the threads on ALL of your glow plugs, old ones & new ones. 3 of them had to be re tapped ever so slightly. and yes all ports were cleaned thoroughly. the nuts are 7mm on new & 8mm on old and easy to lose. took about 3 hrs for all 8. wheels off fender liners, inner cooler tubes

Extremely disappointed... installed 8 of these in my Silverado only to have one fail within a week.. upon extraction, the tip broke off in the cylinder and i'm now facing a large repair bill.... run from this product....More information - upon removal of the other 7 plugs from this company 2 more were on the verge of also fusing to the head. My only recourse now is to have the head removed, a process that usually involved engine removal. DO NOT think for a moment this company's product are a good deal

I bought him a year ago I have to replace them already you get what you pay for

easy install