Won't start chevy trailblazer

Jessica Imm

Asked by Dec 25, 2015 at 05:20 PM about the 2002 Chevrolet TrailBlazer LS 4WD

Question type: Maintenance & Repair

So my 02 chevy trailblazer wont start on first turn
of the key sometimes multiple times. Gauges read
funny on the dash when it does fire. once it starts
running though the voltage jumps back to normal,
blower motor doesn't kick on right away. Battery is
good and so is alternator. Help!!!! I am lost for

9 Answers


It is possible you have a bad ignition switch.

Jessica Imm

That was change along with alternator and crank sensor


Any codes in the computer?

Jessica Imm

I have evap codes and did have crank sensor code but changed that


Check your battery connections. Both ends both cables. Check anywhere there is a ground wire.

Jessica Imm

OK will do after my baby is born praying it makes it that far my husband is an electrician not a mechanic that's what I am but this has me so stumped


OK! Congrats on the baby! A bad switch or a bad ground somewhere or dirty or bad battery connections are the most common causes of this problem. Hope you figure it out. Good luck!

Jessica Imm

Ignition switch was changed by dealer battery is clean and still good so assuming bad ground somewhere


Your key my be worn out I have a 2003 trailblazer an have changed everything

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