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po673 code ...What am i missing?

2970 Views 1 Reply 2 Participants Last post by  [email protected]
Got a 2000 excursion with 149k mls on it. I was getting a po675 code which was for the number 5 glow plug. So I took it to the shop and had all the glow plugs and new valve cover replaced on that bank. Now after getting the truck back, im getting a po673 code which is for the number 3 glow plug...So I then replaced the batteries as the mechanic said it needed new ones for glow plugs to work right but still didn't fix the problem. I have over $550 spent trying to fix this crazy glow plug problem...what am I missing? Thanks everyone!!
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My bet is that there is an issue with the GPCM or the wiring going to/from it.
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