Will crank, will not start?

Tiny
HEATHER0942
  • MEMBER
  • 2004 CHEVROLET SILVERADO
  • 6.6L
  • V8
  • TURBO
  • 4WD
  • AUTOMATIC
  • 280,000 MILES
Will crank but will not start. Has sat not for about a month. Thought I had disconnected it. But I hadn’t. Tried resetting security system. Not sure if I even did it right to be honest. (Alarm was tripped when it got power) replaced fuel pump relay. Checked all fuses. Has 14 volts and manually pumping fuel pump but still will not start.
Saturday, November 5th, 2022 AT 1:34 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,772 POSTS
Hi,

If the security light is staying on, with the key in the on position, let it sit for approximately 10 minutes. If the light turns off, see if it will start.

Now, the idea that it cranks but won't start is usually caused by two things, a loss of spark to the plugs or a fuel-related issue.

If the security light is turning off, see if it will start using starting fluid. If it does and then stalls, we know it's a fuel-related issue.

If there is no change, I need you to check for spark to the plugs.

Here is a link that explains how to check it:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

Let me know what you find.

Joe
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Saturday, November 5th, 2022 AT 11:26 PM

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