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VERY odd starting problem with video 2016 4500 express 6.0

davidl340

By davidl340
in Chevrolet Express & GMC Savana

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davidl340 Enthusiast

davidl340

Posted
Posted

I have a 2016 Chevy Express Van 4500 6.0 gas cutaway chassis under a Jayco motorhome with 4600 miles.  I bought it a month ago and it has this bizarre starting problem.  It is easier to show a video than describe it.

 

I have already check the starter/solenoid and hot wired under the hood in the fuse box to the start relay and it is not those.  I have swapped the relays also.  This is an issue between the starter relay and the rest of the electrical system.  

 

If anyone can tell me what TSB 16-NA-346 is I would be greatly appreciative, can't find out anywhere what it is but I hear it is something to do with starting.  The dealer has been dragging their feet for a MONTH and don't want to work on it because it is a motorhome.

 

Usually it starts, it is intermittent, solenoid gets power intermittently, not at all, or instantly, no pattern.   I have already replaced the battery.  Sometimes it just delays then starts after a couple seconds.  Sometimes it starts perfect.

 

Here is the videos.  Video 2 and 3 are the best ones.

https://www.youtube.com/playlist?list=PLjlbvzbqjw21tQl3UwEWSptkj3YOZFfCu

David 

 

davidl340 Enthusiast

davidl340

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I have googled this subject to death, finding the real TSB has not happened yet w/o having to pay.  As you know some of these TSB are really useless, was hoping someone had the real one and could tell me if it is worth it. 16-NA-346

hollywoodsle Enthusiast

hollywoodsle

Posted
Posted

The cause of the condition may be the internal spool sleeve in the starter not allowing full travel of the armature to engage the flywheel.

 
davidl340 Enthusiast

davidl340

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hollywoodsle is that what the TSB said?  That isn't my issue for sure unfortunately, when I hot wire the starter it works perfect.  Thanks for the post.

Just now, hollywoodsle said:

The cause of the condition may be the internal spool sleeve in the starter not allowing full travel of the armature to engage the flywheel.

 

 

diyer2 Senior Enthusiast

diyer2

Posted
Posted

I tried.

Didn't know you had researched it.

I guess pay up if you want your answer.

:)

davidl340 Enthusiast

davidl340

Posted
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Yup.  I did just get an appointment at the dealer.  Will see if I get the typical "sorry, can't reproduce it" answer.  I've been working on cars for a long time, this one is weird one.

hollywoodsle Enthusiast

hollywoodsle

Posted
Posted
23 minutes ago, davidl340 said:

hollywoodsle is that what the TSB said?  That isn't my issue for sure unfortunately, when I hot wire the starter it works perfect.  Thanks for the post.

 

Yes that's from the bulletin

davidl340 Enthusiast

davidl340

Posted
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So just dropped it off at dealer. They informed me that I am a couple weeks out of bumper to bumper warranty and starter/electrical system probably won't be covered on powertrain warranty :fume:   Have a feeling this is going to be a complicated one to diagnose (bet they'll swap a starter and it will flake out again in a couple days), bet the bill is going to be ridiculous.

 

UPDATE: dealer says 'short in fuse box', $450, my responsibility.

davidl340 Enthusiast

davidl340

Posted
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So, picked up from dealer, it starts right now.  Somehow he got the price down to $160.  The part they replaced was part# 23104897.  So far so good.  Posting this so others with same issue can possibly diagnose it themselves.

  • 1 year later...
rockfishon New Member

rockfishon

Posted
Posted

I had the same exact issue.  There is a batch of bad relays in that model year cutaway chassis.  I had to replace 3 of my original relays with aftermarket ones.  That fixed my issue.  The relay that causes the issue is the Run/crank relay.

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