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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

02 Suburban 2WD LS 5.3L Won't start (ECU, Ignition, Starter?)

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Old November 11th, 2023, 12:24 PM
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Default 02 Suburban 2WD LS 5.3L Won't start (ECU, Ignition, Starter?)

What's up guys, I'm new.

checked pages and pages of posts and didn't see anything specific to help troubleshoot and I wanted your help.

3 weeks ago I started my Burb and my
cluster went bezerk. Once it warmed up it was fine. Then this week I went to start it and it was almost completely dead. I had spitfire starter click and it eventually went dead.

- New Battery last month
- Jumpstarted and charged for 30min & nothing
- opened under hood fuse box, reseated everything and it started.

So I went to store and came out and I get the one click start and got towed 😫

This morning I disconnected ECU, checked for intrusion and cleaned the seals and reseated (still nothing).

All the symptoms seem electrical, so I don't think it's the starter. I had my alternator tested last month hence the bad battery for new.

Do you think it could be my ignition switch or still be a bad ECU issue?

Still have juice and car really seems fine other than it won't start.

I'd appreciate y'alls help troubleshooting before I take it to a mechanic.


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