04' Silverado 2500HD P0670 & P0381

yeowguy

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#1
I have codes P0670 & P0381 on this truck. Are they related with one another? Or are they two separate glow plug issues?
 

kev2

wrench
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Nov 14, 2006
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#2
well they are both glow plug CIRCUIT issues. that means ck wiring FIRST. before we R&R module.

I will try to get some more specifics, Start simple - fuses? relays... I will try to get Diagram time permiting
 

kev2

wrench
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#3
everything points at the GP module.... I am not fond of changing just because that is the norm.... Having trouble finding a test that does not start- CONNECT TECHII