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Chevrolet
Trailblazer
Electrical
Battery
Drain
Battery drains overnight
2003 CHEVROLET TRAILBLAZER
156,000 MILES • 4.2L • 6 CYL • 2WD • AUTOMATIC
BONNIEWITT4444
MEMBER
1 POST
Alternator checks good and battery checks good! But won't start without a jump!
Sep 16, 2019 at 5:02 PM
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ASEMASTER6371
✓
Experienced Mechanic
52,796 POSTS
Good morning,
You need to narrow down the drain. I attached a guide for you to follow to narrow down the drain. Follow the process and keep me updated.
https://www.2carpros.com/articles/car-battery-dead-overnight
Roy
Sep 16, 2019 at 8:50 PM
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