2019 Chevy Trailboss - Crankshaft broke with 5,000 miles

[warriors1991]

I purchased a brand new Trailboss with the 5.3 V8 in June of 2019. In August of 2019, while hauling my 3000# pound boat on Interstate 65, the crankshaft in the engine broke. It had 5000 miles on it and I was well within towing/hauling limits. Has anyone else experienced this with their Trailboss or can I chalk it up to a bad part? I argued with Chevy and told them I wanted a new crate motor. They wouldn't do it and only agreed to repair the truck. They did increase the warranty to 100k miles on the powertrain. Has anyone else experienced this?

 

[dagedoty]

Modern GM V8's are generally regarded is near bullet-proof with 200k-300k mile motors still reliably chugging along. Crankshaft casting issue? That is a rare defect that does not make anyone's list of problems with GM V8s. 5000 miles is pretty new for a complete engine tear down. I hope they give you a loaner while you wait for this rebuild. They are adding 40k miles to warranty so that should help make you feel a little better protected.

 

[warriors1991]

I've been searching the Internet high and low to see if anyone else has experienced what I have. Haven't found a single instance of this happening to anyone else. It now has 24k miles on it. And, no, they did not provide me a loaner. Was without my truck for 2 weeks. They did pay for my rental car to get back home......after 3 months of nagging from me. It was a nightmare.

 

[tbuss5831]

Shit you got it back in 2 weeks thats fast, shop must of been a low volume one. I have worked as a technician for a dealership for over 5 years and have never seen a crankshaft failure. You sure thats what they told you and not a Camshaft?