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Location: Orangevale, CA
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Sounds like it could the GPR or the GPs. I'd lean more toward the GPR. I'm not sure what the likelihood that all GPs would be out at the same time. A couple of things you can do.
1) Have someone in the truck (you under the hood) and turn the key to KOEO (Key-On, Engine-Off) and watch the WTS light. You listen for a click on the GPR. If you have an Volt meter, you can check the output pin to see if there is voltage. If yes, it could be GPs, If not, it's your GPR.
2) When cold, not having it run, use something metal and short the two large terminals for about a minute and then try to start it. If it starts easier than before, you probably have a bad GPR.
R U getting the WTS light? You do know that a normally working GPR circuit will keep the GPs going for about 2 mins, regardless of what the WTS light does, right?
R U running any kind of fuel additive that has anti-gel in it?
Just some suggestions.
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