1999 GMC K1500 Suburban starts then stalls

[MasonGriffis]

Hello everyone. I have a fun issue. My 99 suburban decided to die on me recently. Was running alright. Went into my parents for maybe 30mins. Came back out it fired up and then died maybe a half second to second after. Never had the issue before. Today decided to attempt to diagnose. It has spark. Distributer looks good. Changed the fuel pump with assembly and fuel filter. Also changed the cam sensor and crankshaft sensor. Lastly changed the ignition switch due to sometimes it acting up and messing with my gauges and transmission. Checked the idle control valve motor. Seems to be working. Cleaned the gunk off of it and the throttle body. Checked all the relays. All working. All fuses are good. Attempting the security passcode reset now due to running out of options. The security light isnt showing. But not sure if this suburban has one. Spray starter fluid into intake and it will run for a second longer then dies out again. Not sure what's causing it. thinking maybe fuel pressure regulator. Any ideas?

[riverbanks]

Are you hearing fuel pump run for the 3seconds with key on?

[MasonGriffis]

Yes it is 

[riverbanks]

Finish the security relearn,then we can look elsewhere

[MasonGriffis]

Just finished it. No Darn luck. I dont have a security light showing at all. I'm dumb and reset the codes before going to my dads so I can't see if there was something that was potentially going bad before it happened. 

[riverbanks]

When you checked fuses, battery voltage both sides?

[MasonGriffis]

Yes we did. 

[m&jtrans]

Did it backfire or anything before it died?

The Blue Mule

[MasonGriffis]

No backfire. Just changed the idle control valve. No change. Was hoping that was it 

[riverbanks]

Go-to,troubleshootmyvehicle.com,many good write-ups

[MasonGriffis]

I will give it a shot. Thank you. I'm honestly thinking the fuel pressure regulator could have possibly took a crap. Which is some work to get to 

[BlancoSilverado]

A bad fuel pressure reg needs to be completely blown out to not have a no run, the fuel pump is always on(after start).

if you give it gas while it is starting and running will it idle or will it still die (keep your foot on the gas after it starts)?

 

[riverbanks]

Rent a fuel pressure tester? other, maybe, disconnect MAF wiring and try it,they on occasion will fail that way, another is to disconnect coolant temp.sensor,unhooked is full"rich", just some ideas

[CrystaledJazz]

There is a fuse in the fusebox under the hood, its called something on the lines of body control or something, I think its a 10 amp fuse.  I had this problem and this fixed it.

[MasonGriffis]

We checked all the fuses with a test light. I wish it was that simple.