Hose Leak

[JerryCanada]

Was filling the washer fluid last night and found the hose between engine and radiator appear to be leaking. Anyone know what this hose is? 2015 Sierra 1500 with 5.3L. 

[imiller1974]

I think thats the engine oil cooler line. 

[paumat]

Might be trans cooler line. They’ve be an issue for years and years leaking where the rubber line connects to the hard line. 

[JimCost2014]

Oil cooler lines, they seep at the fittings.

 

I would wipe them down, then monitor the amount of fluid leaking.

 

How many miles on the truck? Ever noticed any spots of fluid under the truck on the floor/ground?

 

 

[mjm-1957]

Thats the engine oil cooler line, the  trans cooler lines are the smaller ones.

[Brian2015]

my 2016 with 47K miles looks identical to yours.