2003 Chevy Trailblazer.
Dear BL: I think my battery may be shot.  I've had to get a jump the last two days.  If I purchase a
new battery, what is the proper way to install it?

First remove fender support bracket (if equipped). 13mm and/or 10mm bolts.

Next remove battery cover. It should just pull straight up.

Remove NEGATIVE CABLE BOLT FIRST and put cable aside.

Remove positive cable nut next.

Remove lower battery hold down bracket. A 13mm bolt on lower portion of battery
Lift battery out.

Install new battery., lower hold down bracket, POSITIVE CABLE AND BOLT FIRST. Then negative
cable and bolt. MUST remove/install cables in the proper order to prevent accidentally shorting out
wrench. Install cover.

NEVER allow wrench to contact metal while touching the positive cable.
Never allow wrench to contact positive to negative cable/bolt while they are attached to the battery.
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How To Replace Chevy Trailblazer Battery