I have a 2007 tahoe lt3 with a build date of 12/05. I did the vin look up I found on this forum. I had always thought I had the towing package but now I am not sure. The vin said something about a hitch package(don't remember exact verbiage). I have the digital temp gauge and prewired brake control hookup(I installed a brake controller). It also has a 3.73 gear. Anyway when I was changing my trans fluid today I noticed all it had was a powersteering cooler and not a trans cooler, wtf? Do I have the tow package? I was towing a 6000 pd trailer in arizona about a year ago and the temp got up to about 235, lol. The manual states 170 to 200 is average so I guess thats not to bad. I have been using royal purple as fluids lately b/c it runs cooler but when I read the back of there atf it states that it will void the warranty of gm dexron 6 transmissions. So I just ran valvoline dexron 6 full syn instead that is recommended for gm vehicles.