No crank no start

Tiny
TYRONE MONTGOMERY
  • MEMBER
  • 2008 CHEVROLET TRAILBLAZER
  • 4.2L
  • V6
  • 4WD
  • AUTOMATIC
  • 282,000 MILES
I replaced ignition switch when I turn the key no crank no start but if I go to the starter relay I can bypass it and it'll crank but it still won't start replaced battery ignition switch
Sunday, September 7th, 2025 AT 2:05 PM

1 Reply

Tiny
CANNON1349
  • MECHANIC
  • 862 POSTS
Hello,

If you can start the vehicle by jumping the relay then the relay may be bad. You can swap a relay that looks identical and see if the car will start. If it does, then replace that relay.

If the car still does not start then there may be a fuel issue. Can you hear the fuel pump making a whirring noise before starting the vehicle?

William
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Sunday, September 7th, 2025 AT 4:33 PM

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