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Old 12-03-2018, 08:50 AM
Kennedy Kennedy is offline
Long Distance Crew Chief for BMDMAX
Join Date: Mar 2000
Location: Loyal WI US
Posts: 10,691

Back in the day when these trucks were new (and I think limited to 2001 models) the rolling idle flow chart was this:

1) Rolling idle cold= software
2) Rolling idle warm= regulator

Now all of this should be old news and the model year does not fit, but I would also be looking at the fuel filter and say that you need a lift pump. The CP3 has been known to last seemingly forever.

My other thought which is the most likely is the source of the reman pump. I see LOT of sub standard stuff especially if "reman" by anybody other than Bosch Factory. I won't name names, but I suspect the answer will be coming soon.

More reading on lift pumps:
Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
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2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ

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