I have a coolant issue now that I am trying to get the dealer service to solve. I have 29K on my 2018 3500 Silverado and seem to be loosing coolant in the last 5k miles. I have never seen any coolant spots anywhere. The dealer changed the water pump because they said it was leaking (I doubt it was the cause). They have also installed the new engine block heater. Still I loose coolant somewhere.

They have topped the reservoir off several times since the part changes so I think there are no air bubbles left in the system.

I'm due to take it in on the 15th since it is still loosing coolant, but I don't really want them to tear much down unless they know what they are going after, beside warranty reimbursement $$.

I've searched the forum and had nothing show up that was similar.

Anyone with a similar problem that they have resolved?

Jim

 

Ridiculous......... My '05 Dmax with 290K on it is bone dry underneath and the '18 with 42K has coolant leak issues. Nice!

 

Took mine in for the 3rd time over low coolant light in 58k miles. I was told air in lines and if it happened again they would replace the surge tank by the radiator. I still need the heater cord recall done and was told they have to drain the coolant to replace. I’ll have them replace surge tank while it’s torn down.


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I wish this was just the common surge tank issue. Unfortunately, it's not.

 

do a pressure test with a kit from harbor freight
I found mine after 3mo. It was the radiator crack and running down frame rail. Thought it was my heads again. Thank goodness it wasn’t
Another was my bosses truck the block off plate on bell house o-ring broke and only leaked while running

 

Did you figure out where the leak was coming from been dealing with the same issue sadly