Checking rail pressure while cranking

[Konstantin]

(11-10-2019 )Lonestar10 Wrote:  If the check valve is is the small one I replace it's on the back of the fuel module the module the actuators/elec fuel pump/gear pump/fuel shutoff has to come off it comes off with everything attached to it. Believe it was 5 bolts maybe 6 and 3 fuel line connections.

I find in quickserve that it is located above lift pump. But it also says that my truck has one more check valve above fuel filter