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Old 12-22-2005, 05:21 PM   #25 (permalink)
klhansen
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Re: Hard/No Start? Check here first.

[ QUOTE ]
Other times, Id put it in the on position in the morn and the batt. indicator on the dash would slowly go down to the 8 mark very erratically and then the stock headunit would flash on and off, as well as a bunch of clicking coming from the engine bay.

[/ QUOTE ]
That sounds like you are having a battery issue. How old are they?

[ QUOTE ]
When the truck is warm, it wouldn't have the problem. I'm thinking the ECU is bypassing the warming of the GPs and thus bypassing the GPC? [img]/ubbthreads/images/graemlins/shrug.gif[/img]

[/ QUOTE ]
Yes, the GPR (and presumably the GPC) is controlled by the PCM to only energize the GP's when the engine is cold. If the oil temp is over a certain value, the GP's won't even be turned on.
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Hard or no-start? Check Here
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