lt170chevelle

iTrader: (2)

I put a 5.3 in my 98 blazer in january . Been a daily driver almost trouble free. Today i went to start the truck and it starts then instantly dies. with the key forward the security light turns on and then off like normal but when i start it it flashes after it dies.
Any ideas on what i can do?
I did the vats relearn when i first installed the motor and hasnt been an issue since. I didnt didnt want to disable it.
Please help

bagged67camaro

iTrader: (4)

not sure is the fuel pump running u got spark?

lt170chevelle

iTrader: (2)

It ended up being a security issue and had to do the key relearn procedure.