[crazydave1948]

Have an 04 Colorado with the I-5 engine. It will start but won't stay running. Where do I start looking and where after that?

 

[Keyav8r]

If it starts it’s getting spark so I would look at the fuel system first, specifically the fuel pump. Check the pressure at the rail without the engine running and when it starts.

 

[Dragon08]

How long does it run before it dies? Does it run smoothly, or does it chug and sputter out?