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Username Post: 2002 2500hd 6.0 Silverado        (Topic#364779)
2002chevy2500 
Newbie
Posts: 3

Reg: 03-29-21
03-31-21 04:14 PM - Post#2817230    

Truck turns over and dies instantly. Cranks fine and everything sounds good it just dies as soon as it starts. I already checked fuel pump relay and ignition relay and they’re good. Fuel pump sounds good, I’m going to test fuel pressure just in case. Also fuel gauge and voltage gauge both stopped working at the same time the truck wouldn’t start up. There is no security lights flashing. I’ve tried numerous amount of time to start it. Took a test light and fuses looked good. In need of some help



 
rockfangd 
"8th Year" Gold Supporting Member
Posts: 3099
rockfangd
Age: 35
Loc: Utica ny
Reg: 04-13-10
03-31-21 05:01 PM - Post#2817234    
    In response to 2002chevy2500

Does it have a security light??
If it does start but then shuts right off that sounds classic of a Passlock Failure.
It kills injector pulse as soon as the engine starts.

Old School GM fan FOREVER


Edited by rockfangd on 03-31-21 05:01 PM. Reason for edit: No reason given.

 
wagonman100 
Site Ambassador
Posts: 15082

Loc: Baltimore, MD
Reg: 11-27-04
04-02-21 07:17 PM - Post#2817363    
    In response to rockfangd

He said the security light is not on. It could be the crank sensor. The fuel pump primes whenever you turn on the key so the engine will run off of that fuel for a second or two. But if the computer is getting no signal from the crank or cam sensor, it will shut off the fuel pump.

Jay
Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier


 
rockfangd 
"8th Year" Gold Supporting Member
Posts: 3099
rockfangd
Age: 35
Loc: Utica ny
Reg: 04-13-10
04-03-21 09:09 AM - Post#2817385    
    In response to wagonman100

I asked if it has a security light. Sometimes the light does not work. If it does come on on the key on cycle then you know the light works.
It could be the crank sensor or wiring to it, but hopefully there would be a DTC pointing to it.

Old School GM fan FOREVER


 
2002chevy2500 
Newbie
Posts: 3

Reg: 03-29-21
04-03-21 01:45 PM - Post#2817396    
    In response to wagonman100

Is there a way I can test those sensors without replacing them?



 
2002chevy2500 
Newbie
Posts: 3

Reg: 03-29-21
04-03-21 01:46 PM - Post#2817397    
    In response to 2002chevy2500

I used a scan tool and no dtcs came up. I put a new ignition wiring harness and switch in and that made no difference and still has the same problem



 
wagonman100 
Site Ambassador
Posts: 15082

Loc: Baltimore, MD
Reg: 11-27-04
04-04-21 01:06 PM - Post#2817454    
    In response to rockfangd

Sorry, I was assuming since he said there was no security light flashing that it has one and is working.

Jay
Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier


 
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