04 Denali, Cranks a while before starting
 

Last week my truck started cranking longer before starting but does eventually start and runs fine. If i turn it off and start it right back up then it fires right up. If it sits a while then seems like it loses pressure maybe and cranks longer. Could this be fuel pressure regulator? 04 denali, intake and w4m tune

Also, wife says theres a bad gas smell. No visible leaks though

No lights

To answer your question, yes it could be a bad fuel pressure regulator.

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Crank position sensor also has that effect

Would a CPS cause fuel smell and start back up right away if it doesnt sit too long?

1
 

Yes it could but im no expert its just my opinion i had it happen on a Cadillac i had