Cranks no start no spark to the plugs

Tiny
ERIC KING2
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 153,000 MILES
Engine turns over but will not start. I can hear the fuel pump prime, but do not have spark to plugs.
Friday, December 16th, 2016 AT 6:37 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

A no spark will happen for a faulty ignition control module.
It can even happen due to a bad crank sensor.
There is also a ignition relay for this vehicle that can trigger no spark as well.

First item need to be checked is the ignition relay under the hood fuse block (see diagram).

If the relay is good check the control module.
The module can be tested. Just take it to your local part store and they will have the tool to do that.

You might find this article and the video helpful:

https://www.2carpros.com/articles/car-cranks-but-wont-start

https://youtu.be/dCjmRL3p4Cs

Please let me know of any questions.

Thank you.
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Sunday, August 8th, 2021 AT 9:14 PM

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