I just remembered....There is a TSB out for the 03's that involves a re-flash that keeps the lift pump running at key on. It is suppose to fix the hard starts that the 03/04 guys were seeing once they had the in-tank lift pump retrofit done. I guess the usual 2 seconds of run time wasn't enough to get fuel to the CP3 when the pump was located at the rear of the truck. I had the re-flash done to my truck and really liked it. During the winter when I used my autostart, it kept the lift pump running during the 20 seconds or so delay my auto start had for the grid heater. It didn't run "forever" though. Eventually it would cut off.
Since it is a software re-flash, the latest BullyDog software may have it incorporated.
On edit: TSB 18-017-05, Flash: Long Crank Times
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03, 4X4, QUAD, LWB, Standard Output, 47RE, 3.73, ATS TC/VB, DTT Trans/Billet, Flex Plate, TorqLoc, RAD, Twins, Snow, Hot Cp3, Injectors, Cam, 315s, 8,200 lbs wet.
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Last edited by AK RAM : 05-08-2006 at 04:53 PM.