[05reddmax]

i have an 05 lly dmax. when the truck gets warmed up, u can smell antifreeze on the passengerside right by the front headlight. there is no white smoke and no shit in the oil AND there is no leaks. slowly the tank gets lower and lower. where the hell is it going?

 

[19psi]

pressure test it. you can buy a diy kit pretty cheaply if you shop around.

 

[Duramax56301]

If your slowly running lower I wouldn't think you would see much for white smoke if you were somehow burning it? What kind of milaegae do you have on the engine and had it ever had a new headgasket in it?

 

[tsmnova]

Try searching for headgasket issues with LLY's. Did mine at 81k miles. Sucks, but may be heading that direction. Hopefully it is an easier fix for you. Good luck.

 

[AlisoBob]

Check the waterpump "weep hole"... you can see it through the drivers side fenderwell....

It will look wet, but no coolant will reach the ground.

 

[05reddmax]

there is 101,xxx on it. i dont believe there has been a head gasket change on it. but if it where a head gasket, you wouldnt smell it would you? it makes sense what alisobob said.