Where is the coolant air bleed hose located "exactly" on 2005 Chevrolet Colorado

Have replaced the thermostat, am following the steps to refill the radiator with coolant, one of the steps is to detach the air bleed hose. Can't figure out where it's at.

Asked by for the 2005 Chevrolet Colorado
Would like to help but there's three models of the Colorado. A LS, LT and wT. Two different engines. A L5 and L4 cylinder. More info please.
I checked the body of the pickup and looked in the owners manual to identify LS, LT or
I do know the engine is s 2.8L 4 cylinder.

Thanks for your help.