2006 Yukon Denali xl (6.0L) intermittent start

[YUKONJOSEPPI]

I Agree with you about the check valve. It just seems so crazy that I would get too bad fuel pump’s in a row.

The first one was a After market And the one that’s in there now is from the dealer.

I’m not sure if it’s possible to even check that or diagnose it what do you think


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[OR VietVet]

You can attach a fuel pressure gauge and when you shut it off you can monitor the gauge to see how much the pressure drops.