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Thread: Glow Plug issue

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  1. #1
    Join Date
    Mar 2004
    Location
    New Paris, OH
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    63

    Default Glow Plug issue

    Have check engine light on so went to Advance to have the code read. #2 glow plug (did not catch the actual code number). Have not dug into it as it is cold outside to really work in it. What should I look for and should I replace all the plugs instead of just one? Thoughts?
    2013 D/A 2500HD Crew Cab<> B & W Rollover Ball, Bed cover, def deleted

  2. #2
    Join Date
    Dec 2002
    Location
    Teton Valley, Idaho
    Posts
    1,873

    Default

    If you're familiar with the use of a multimeter, you can easily check the glow plug for continuity (something just north of zero ohms). If the plug shows an open circuit or very high resistance between the hot lead and ground, the plug is fried. A bit of antisieze on the threads of the new one will make it easier to disassemble down the road.

  3. #3
    Join Date
    May 2012
    Location
    Langley
    Posts
    369

    Default

    I've got the same thing, but on #6 (P0676)

    Once the weather warms up I'll replace it. Right now it's too crappy out and I don't think having one glow plug ineffective is going to hurt anything. Especially given how the truck's not moving much ATM.

    To the best of my knowledge there's no value in replacing glow plugs other than the one that's experiencing an issue.
    GMC Sierra 2500hd 2004.5 now with ARP studs

  4. #4
    Join Date
    Dec 2002
    Location
    Teton Valley, Idaho
    Posts
    1,873

    Default

    When you do get around to replacing the bad plug, don't get aftermarket. They heat slowly and don't work well at all, in my experience. I changed all of mine out when I had the engine torn apart to replace head gaskets 100K ago. With the new ones in, the truck would take several seconds longer to start. Put the OEM ones back in, and the problem went away. Just my $0.02

  5. #5
    Join Date
    May 2012
    Location
    Langley
    Posts
    369

    Default

    Quote Originally Posted by rapidoxidationman View Post
    When you do get around to replacing the bad plug, don't get aftermarket. They heat slowly and don't work well at all, in my experience. I changed all of mine out when I had the engine torn apart to replace head gaskets 100K ago. With the new ones in, the truck would take several seconds longer to start. Put the OEM ones back in, and the problem went away. Just my $0.02
    Good to know, my local parts place tends to steer everyone away from aftermarket for everything.
    GMC Sierra 2500hd 2004.5 now with ARP studs

  6. #6
    Join Date
    Mar 2000
    Location
    Loyal WI US
    Posts
    10,792

    Default

    In my experience with the late model trucks (LBZ, LMM, LML) if one goes do the entire bank and be ready to do the other shortly.

    We have the Delco plugs available but you'll want to contact me direct.
    Kennedy Diesel-owner
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