Today I am cleaning my radiator and innercooler. I removed them in my 05 which has 265k on it. My iat2 would read about 25 deg higher than my 03 on simular terrain and oat. Ac didn't work the best and it would run 200 to 210 ect all day with my new stat. I am surprised any air got through this mess with the amount of filth stuck in the innercooler and the radiator. Mainly bugs in the radiator and mud came out of the innercooler. This is not a lifted truck or anything. Might be something to check if your ac is not cooling very well and run higher than 190 ect with no load. I am getting ready to put it back together I will let you guys know how I turn out.

 

This did bring the coolant down to 190 pretty much all of the time. My iat2 is reading about 25 deg. Cooler. The ac is about the same but cleaning didn't hurt anything.