Diesel8

[Diesel8]

Hey Guys,
After returning home with the boat got in all stock 2008 GMC LMM with 85,000 miles to unhook the trailer. Started the truck and got out and the truck just quit after running 10 to 15 seconds! Will crank but not start! No water or dirt in the filter! Any suggestions would really be appreciated!
Thanks in advance!

 

[2004LB7]

first off, welcome

what have you tried? priming the filter?

 

[Diesel8]

The computer said the fuel filter had 20,000 miles left but I replaced it anyway! It holds a good prime! No check engine light! I bought a Blue Driver scan tool and it didn’t show anything!
Thanks for your reply Jason! I appreciate it!

 

[2004LB7]

if it holds good prime then I'd start with a scanner that can read fuel pressure

 

[TheBac]

if it holds good prime then I'd start with a scanner that can read fuel pressure

Thinking CP3 failed?

 

[Diesel8]

Thanks 2004LB7! That’s what I was thinking! Appreciate it!

 

[2004LB7]

Thinking CP3 failed?

not necessarily a failed pump but something keeping the pressure down. I usually start with fuel pressure when one won't start with no codes. if it has plenty of pressure while cranking then we can rule out air leak, filter, CP3, etc and start looking at other things

 

[Diesel8]

Thanks again 2004LB7!