OBD Code P0671 - Duramax
2007 GMC Sierra SLE 3500 with Duramax/Allison Combo. Have recently gotten an OBD Code P0671, which points to an issue with the glow plug circuit in cylinder 1. There are absolutely no symptoms of an...
Forum Discussion
Charlie D. wrote:
If replacing yourself gently turn to loosen and make sure it is not seized, Breaking it off will be a huge problem, Replaced 3 on my 2006. One by dealer and two myself. Added a little never seize to the threads.
First one went out in Wyoming on a 5 week trip. Dealer said it was emission and I could drive without it. Another 3 weeks and 3,000 miles before I got back home and no issues
My pickup has 166k miles and mine came right out. Trick is to do it when the engine is warm. And just change it out when you change the fuel filter. Have to take the fender well off and it's right there. Easier than a spark plug.
