06 express w/4.8l fuel pressure test port

[ccfamorgan]

Good morning ya'll,
Long story short i have a 06 express cutaway that has intermittent starting issues. Runs great when it runs, 40k miles (mfsab bus for a youth center), and the last 3 days it wont start. It cranks, and wants to run but no success. I want to test the fuel pressure to see if its a bad pump but idk where the test port is. ive tried looking online but no luck as everything i can find is for the 5.3 and 6.0. Thanks for your help

[MountainManJoe]

Welcome to the forum.

fuel pressure test port is on the fuel rail.

https://charm.li/Chevrolet/2006/Express ... 0Pressure/