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01-27-2013, 12:15 PM
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#1 (permalink) |
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Diesel Enthusiast
Join Date: Jan 2013
Posts: 6
iTrader Score: 0 reviews
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2008 GMC sierra HD codes p0673 p0674 p0678
Trucks runs fine, engine light and codes
codes p0673 p0674 p0678 need i do anything? Runs and drives fine. If so from my reading a glow plug issue? Is this common with this truck? thanks |
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01-28-2013, 01:25 PM
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#3 (permalink) |
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Diesel Fanatic
Join Date: Jul 2010
Location: Austin, TX
Posts: 97
iTrader Score: 0 reviews
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Those are glow plug codes. I've had two replaced on mine, one a couple of times. Also had the glow plug module replaced because even when the dealer replaced (under warranty) the same one a couple of times, they replaced the module. When I asked if this was common of the service mgr., he said no, but I think otherwise.
Mike
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2010 Silverado 2500HD 2WD Crew Cab, Long Bed Summit White, Classic Soft Leather Duramax/Allison Fumoto Drain Valve Fuel Filter Access Door PCV Re-Route (All Season Diesel kit) 6" Powder-Coated Black Running Boards Duraflaps Rear Wheel House Liners AMP BedStep Towing a 2012 Jayco Eagle Super Lite 308RETS w/ a 1400/14K Equal-i-zer hitch |
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01-28-2013, 07:28 PM
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#5 (permalink) |
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Diesel Specialist
Join Date: Sep 2007
Location: Wesley Chapel, FL
Posts: 759
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1, 3, 5, and 7 are on the passenger side. 2, 4, 6, and 8 are on the drivers side. Total opposite from a regular GM V8 gasser.
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2007.5 GMC LMM SLE2 package, cc/sb, black-on-black, 265-70-17's, Bose, G80, Westin step bars, bedliner, Weather Techs and A.R.E. Xtreme cab-high cap, Transgo jr, D.E with quiet tone, DSP5, blocked & rerouted. Tuned by the Fermanator. A special ordered truck for me!  Special thanks to the Fermanator for his expertise and www.alligatorperformance.com for the blocker plate. http://performancetruckproducts.com/ Last edited by alvareracing; 01-28-2013 at 07:30 PM. |
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01-28-2013, 07:40 PM
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#6 (permalink) |
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Diesel Fanatic
Join Date: Nov 2012
Location: Marysville, WA
Posts: 79
iTrader Score: 0 reviews
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I had #4 replaced a few months ago. The next time one goes I'll be replacing in myself.
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2007.5 GMC Dually EC/LB, LMM. Banks IQ, Speed Brake, Six Gun. Amp power steps. Hadley Air horns. 2003 Corvette Z06, 6-speed 1967 El Camino 327, 4-speed 1966 Sting Ray 427, 4-speed roadster 1966 Sting Ray 327, 4-speed roadster 1960 Corvette 283, 4-speed roadster 3500 Dually Club member #988. |
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01-28-2013, 08:01 PM
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#7 (permalink) |
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Diesel Master
Join Date: Mar 2005
Location: Central illinois
Posts: 1,958
iTrader Score: 0 reviews
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it's pretty easy, you can find the glow plugs for roughly 15-20 depending on where you get them from.
fyi to check them you can take an ohm meter and put one lead on the pin of the glow plug and the other on the block. usually the resistance is less than 1 ohm. if the glow plug is bad it will have a much higher ohm reading. I do this just to make sure I have the right cylinder. yes I've replaced the wrong glow plug before....
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07.5 GMC 2500HD LMM CC/SB DMax Bullydog 4" 304 SS Whistler back Built Ally w/1057 relief valve shimmed few other goodies thanks to Wehrli...  EFI Live Tuned by MR. ATP himself (IdahoRob) |
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01-29-2013, 07:50 PM
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#10 (permalink) |
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Diesel Head
Join Date: Jan 2010
Posts: 40
iTrader Score: 0 reviews
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If it is just glow plugs being out you wouldn't notice any difference at all in engine operation. Only when starting the engine in really cold weather would you see the effects of the glow plugs being bad. How many miles are on your truck? With low miles it would be unusual to have 3 plugs go bad. Dealers in my area cover glow plugs under the 100k warranty. I changed out one myself before I knew about the warranty coverage. Wasn't bad & only spent $15.
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