engine cooling issue - bad radiator?

[2011GT]

Sounds like a head gasket to me.

[NoClassic]

I doubt it's a head gasket. I would buy a pressure tester and make sure there are no leaks. If you cant find any check the thermostat and then water pump.

How many miles do you have in the truck? Any idea if the water pump has ever been replaced?

[soap]

thermostat? Heater core?

[dcs13]

All good info.
Also try google, I came up with a few threads on a similar issue.
(cute name for a forum "piloteers")

http://www.piloteers.org/forums/14-problems/27239-leaking-coolant-passage-gasket.html

[Tremor14]

how did the oil taste?

[4king]

I can't read the post but you didn't not mention the following in the first sentence

Replace
Thermostat
Flush coolant
Verify water pump is functional by bleeding the system as it warms up. Leave cap off the radiator to ensure waterpump is functional as air is bled by the thermostat opening.

Don't over think the problem. Is coolant full and clean? Has thermostat been replaced?

[Txstang1]

check to see if water is coming out the exhaust

[svauto-erotic855]

What part of town are you in? If you are close to SMU I can swing by and put a pressure tester on the radiator and that will uncover any leaks very quickly.

[Captain Crawfish]

i'll give ya 500 bux and a 6 pack for it