Starts then dies

[DocCreer]

My 2000 Tahoe 5.3 was running fine before I stored it for winter,now it starts for a second and dies,fuel pump is working,is it a passlock issue?

 

[Rocket Man]

Sure sounds like it. Is there a security symbol in the DIC?

 

[DocCreer]

Yes but my other Tahoe does too

 

[rockola1971]

Tank may have a bunch of water in it now or the fuel has separated and is turpentine now. Smell it!

 

[DocCreer]

It's only sat about 3 months

 

[PG01]

Gas can start going bad in a month.

 

[Kenny D]

They sell a product called HEET. It is a cheap way to see if it is a fuel issue. Supposed to turn bad gas good again.

 

[brasil]

so you have 2 Tahoes that make the same ? Start and die strange . Friend of mine has a 2003 Tahoe and his ride makes the same. Starts and dies. But in his case the problem only occurs sometimes.
We are now checking the ECU / the sensors.. First we will check the value of the Cooing Water Temp.Sensor...
if he sends false information to the ECU ; for example 0 deg when it is 65 Deg ..then the engine get too much fuel. Result flooding..

 

[PG01]

Hahaha.....no..... he has 2 tahoes but was answering red about the security light...both do the same with security light no start and die...

so you have 2 Tahoes that make the same ? Start and die strange . Friend of mine has a 2003 Tahoe and his ride makes the same. Starts and dies. But in his case the problem only occurs sometimes.
We are now checking the ECU / the sensors.. First we will check the value of the Cooing Water Temp.Sensor...
if he sends false information to the ECU ; for example 0 deg when it is 65 Deg ..then the engine get too much fuel. Result flooding..

 

[Kenny D]

When I was having the passkey issue on my 99 burb, after research I found that if the passkey is active in keeping your engine from running, the security light will flash and not be solid. A solid light means that the unit is faulty but if you turn the key and the light flashes, it is active. Mine would spin over but never start even for a second. I ended up finding out that my ignition switch (key) was coming unplugged in the column. Once I fixed that, I never had that issue again.
Not saying that is the passkey is your issue but just be aware of the light when you crank.