Can this be the ECM? There was a loud pop?

SMURRAY8

MEMBER
2016 CHEVROLET SILVERADO
5.3L
V8
4WD
AUTOMATIC
40,000 MILES

When you put the key in the ignition and turned to start, there was a loud pop and then all of the lights, and dash lights were flickering. Checked the battery, cables etc, all are correct readings. Tried to start again, loud clunk and flickering of lights. I hooked up the Foxwell, and the only thing coming up is the ECM. Any ideas other than the ECM?

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,536 POSTS

Did you load test the battery? What code number does it have? Also, can you upload a short video of the noise it is making now; it sounds like the battery might be ready to be replaced. I would remove it and take it to the auto parts store for testing.

Here is how:

https://youtu.be/qXTpXyv5T1I?si=wnHUfSAHOkCMl0zO

Please go over this guide and get back to us.

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Wednesday, October 2nd, 2024 AT 11:14 AM

SMURRAY8

MEMBER
2 POSTS

Did the load test, and it failed. Thanks for the help. It was definitely the battery. Replaced it, and it works like a dream.

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Friday, October 4th, 2024 AT 12:51 PM

KEN L

MASTER CERTIFIED MECHANIC
47,536 POSTS

Thanks for letting us know, we are here to help, please use 2CarPros anytime. Can you please leave us a rating? (copy entire link)

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Saturday, October 5th, 2024 AT 9:01 AM