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Discussion Starter · #1 ·
I have already experienced a low Coolant light & changed the Coolant tank which solved that issue about 8K ago... Sensor issue.... Traveling up a steep grade today I had to floor it; shortly after I got the Low Coolant message & the 19 LP5 took 3/4 gallons of antifreeze after cooling down... No wet spots on the ground; however, I can smell antifreeze; anyone else have something similar happen? If I can smell antifreeze I know it is seeping or leaking somewhere! Currently not near civilization.... Thanks in advance.....
 

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2021 Silverado 2500HD LTZ L5P
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probably a loose hose or clamp and the drip is hitting a hot surface and boiling off. if it's not in your oil not on the ground it's just getting turned to vapor.

my unprofessional opinion
 

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Discussion Starter · #3 ·
probably a loose hose or clamp and the drip is hitting a hot surface and boiling off. if it's not in your oil not on the ground it's just getting turned to vapor.

my unprofessional opinion
That’s what I am thinking also ( was in radiator business for 45 years) but wondering if any other experiences/ explanations!. Nothing in oil, no performance issues, no CEL other than Low Coolant...
 

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2021 Silverado 2500HD LTZ L5P
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I had similar happen on my 03 1500 silverado I replaced the coolant reservoir and cleaned the hoses real good
 

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Discussion Starter · #5 ·
Well we’re still on the road & had some time to play with truck this evening…. Got it to leak from SOMEWHERE near the back of the engine. Unable to determine exactly where but I’m thinking it is a hose or a clamp. Will let you know WHAT after we get home next week… And either my buddy or dealer can look at it….
 
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