cranks but does not start?

1999 CHEVROLET SUBURBAN

V8 • 2WD • AUTOMATIC

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I have a 1999 cheverolet suburban that cranks but does not start. I change the starter, which was well below voltage and the car started, but when sits over night, the car won't start the next day.

Dec 13, 2010 at 8:02 PM

SQM

CAR REPAIR CONTRIBUTOR
6,383 POSTS

Hello,

It sounds like you might have excessive parasitic draw (current drain).
All electrical circuits with a battery will have some amount of parasitic draw, but it can become excessive due to an issue with one of the electrical components. It could be a glove box light staying on or a shorted window switch.
This vehicle should have a parasitic draw of less than 25 milliamps

Here is a helpful video of how to check and find the draw:

https://youtu.be/z5F7WpgjaRs

https://www.2carpros.com/articles/car-battery-dead-overnight

I attached test procedure for your reference.

Please let me know of any questions.
Thank you.

Images (Click to enlarge)

Sep 25, 2021 at 6:56 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.