[tbyrne]

I've confirmed that the 160 thermostats that we have in stock will work on the 2004-'05 GM trucks powered by the 4.8, 5.3 and 6.0 motors. These low-temp thermostats dramatically reduce your engine’s operating temperatures, improving performance and extending component longevity. They’re easy to install that will also fit all 2004+ GTO and Corvette applications.

The part number and price is - 100228 - $19.99. No 180 thermostats are available at this time.

 

[tbyrne]

I don't have the on/off parameters that GM has programmed but the aftermarket programming that we carry can reset the fans to come on early.