Question about 2003 Chevrolet Silverado 1500

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03 silverado turn the key to start but starter will not engage

I have replaced the starter relay and the ign. switch but when you turn the key on everything comes on like it should but the starter will not engage i have opened the door and cloed it and the truck would then start

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  • bigjune2003 Jan 08, 2009

    i do not have a security system the only thing mine has is a little red light tha flashes right beside my radio

  • Anonymous Apr 28, 2009

    same prblem i do not have a security system

  • Anonymous Apr 28, 2009

    starter will not engage

  • yadayada
    yadayada May 11, 2010

    do u have a securitry system?

  • Anonymous Mar 12, 2014

    key turns and lights engage but no engine/starter engagement

  • Anonymous Mar 30, 2014

    electrical seems okay

  • Anonymous Mar 31, 2014

    motor will not turn over

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  • 45 Answers

Interesting problem, on the starter is a "trigger" wire that originates from the ignition (may run to the power distribution center). When the truck is started 12 volts runs down that wire and activates the solinoid on the starter. Put a 12 volt test light on the trigger wire by the starter, have someone hit the key to start, test light should come on, if not chase wire back and look for a break in the wire or replace trigger wire.

Posted on Jan 09, 2009

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Posted on Jan 02, 2017

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c9b6a69.jpg
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Car will not turn over


Hi,

If I understand you right, the problem is the engine will not crank, that is turn over when you turn they ignition key to START. Having said that, might it be that the issue is with the starter system. The starter system is initiated at the ignition switch when the key is turned to start. At this point, the ignition switch then provides +12VDC to a starter relay (if the vehicle has got one) or direct to the starting solenoid. The relay is but a remote switch with slightly higher amperage capacity. The starter relay then engages and supplies +12VDC to the staring solenoid. The starting solenoid then performs two (2) functions. It provides the switching action (hundreds amps) from the battery heavy cable to the actual starter motor. The solenoid likewise pushes a small pinion gear along the shaft of the starter motor to engage the ring gear. The ring gear is of course on the edge of the flywheel which in turn is attached to the crankshaft.

Starter system problems could be corrected by:
1. check battery, battery cables and connections;
2. charge the battery if required;
3. clean brushes and guides of brush holders of the starter motor;
4. clean the commutator and commutator segments;
5. check/replace the armature or field coils if determined to be defective;
6. in some extreme cases it could be the drive pinion or the flywheel gear ring is defective.
7. often it is the big switch that the solenoid activates that looses contacts causing no +12V internally to the motor.
8. Most likely would be a defective starter relay or the IGN switch itself. Relative to this, you might try and check the connectors/terminals and electrical joints.

In the picture below, the upper portion is the starter solenoid while the one below it is the actual starter.
c9b6a69.jpg
Given the amount of work to overhaul a starter, you might consider just replacing it.

So recommended course of action is determine if there is +12VDC at the starter solenoid when IGN switch is turned to START.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

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