Question about 2003 Chevrolet TrailBlazer
There is a circuit called shift lock control. fuses 25 and 27 protect that ciurcuit. check those fuses. a better understanding of the circuit function can be found at autozone.com there are free repairguides vailable. the circuit diagram will be listed under wiring diagrams as shift lock control.
i copied the link to the diagram, but it might not work. in which case you'll have to go to autozone.com and register and enter your vehicle.
Posted on May 30, 2010
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Posted on Jan 02, 2017
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Do the brake light work? No brake lights and it won't shift out of park. Check your fuses and check for loose wires. Check your brake light switch. If that has failed, you won't be able to get out of park. The other one if the shift lock solenoid which is in the shifter assembly. The brake shift interlock switch prevents the car being shifted from park unless the brake pedal is depressed. Try to apply power/ground to the proper wires & see if it will activate.. If it does, then the problem is between the brake light switch & that solenoid. Could be the wires or the switch.Make sure the shifter cable is still held down in place at the shifter assembly & under the hood. It is the interlock switch that you hear/feel clicking.It is for the prior generation but may still apply.
Good Luck and hopefully you soon will be on the road again...;-)
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