2003 Chevy Trailblazer- Will Not Start

[Truck]

2003 Chevrolet Trailblazer cranks but will not turnover and the service brake system msg comes up on the dash

 

[Mooseman]

So you're saying it cranks but will not start? Step inside...

Cranks but won't start

The service brake system message is unrelated. You would need to pull the brake/ABS codes for that.

 

[Truck]

Yes, cranks but will not start.

 

[flyboy2610]

Does the security light on the dashboard flash?

 

[Mooseman]

Try looking at this thread?

D

Thread 'Cranks but won't start'

Feb 18, 2014

When I turn the key on my 2004 trailblazer it will not start.Just keeps cranking.I have replaced the ignition switch and it still won't start.Could anyone please direct me on common issues that may be causing my trailblazer to not start?

• Dave347
• Replies: 265
• Forum: Vortec 4.2L I-6

 

[Truck]

Changed The Cam Shaft Position Sensor and still not starting

 

[Mooseman]

Moved your post to this existing thread to keep things together.

What led you to think that the camshaft sensor needed to be replaced? Normally, the cam sensor would not prevent the engine from starting.

Did you read through the thread I posted? It has lots of info regarding where to check. We need more information about what's going on.

 

[budwich]

2003 Chevrolet Trailblazer cranks but will not turnover and the service brake system msg comes up on the dash

Is your check engine light ON?