I have an 03 GMC that is very hard to start, more so when hot. I'll have to crank like 15-20 sec in the AM when cold, but almost a minute if it's warm. Sometimes it still won't start. Been in the dealer for 4 days now. Supposedly checked injectors, glow plugs, rail pressure. Said everything was normal and at 20,000 miles, this is normal behavior. I know better. Any hints where to point a new dealership. I picked up the truck to take to another dealer.

bump

They need perform the fuel system high pressure side diagnosis while the engine is hot. Have them look at #PI01499.

Thanks, I'll have them do this.

There have been some troubles with the filter housing sucking air/loosing prime casuing these type symptoms but it is kind of tough to diagnose. You need a tech that can read the high side fuel system diagnosis chart and come up with his own plan to rule in/out the housing.

natk - i was thinking that as well. a fellow member ended up having the OEM filter head assembly replaced under warranty and that fixed his problem which was similar to yous..

They need perform the fuel system high pressure side diagnosis while the engine is hot. Have them look at #PI01499. My thoughts as well