2017 Chevy 4500 will not start

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Joined: Wed Jun 13, 2018 10:34 pm

2017 Chevy 4500 will not start

Unread post by Bill22H » Wed Jun 13, 2018 10:53 pm

After driving our Chevy 4500 for around 4 hours and stopping for a rest break, the vehicle will not start after at least 15 minutes of rest time. The dashboard lights appear as normal when the ignition key is turned, but nothing happens beyond that. The battery has a good charge. I have to let it sit until the next morning, and then it starts on the first attempt. This has happened three times now. It has occured the same way and resolved the same way each time. Could there be a defected part in the ignition system that only becomes problematic after long periods of driving and resolves its issues after a long cool down period?


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Re: 2017 Chevy 4500 will not start

Unread post by carriedi » Wed Jun 13, 2018 11:34 pm

I don't have wiring for the 4500 but the wiring for the 3500 shows a starter relay in the underhood fuse box. Next time it doesn't want to start try switching the starter relay with another relay that is the same as the starter relay. Look for one that says it's for a non-essential system like a horn or headlight relay. then if the starter does work then you know the relay is going bad. If that isn't the problem then you will need to have the starter circuit checked and find the open in the system when it won't start.

the problem is that when you take it in to be checked it has to not start in order for them to find the problem. if it starts every time they check it, all circuits will show up as good. they can only find the problem when it is happening.

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