I have an 07 LTZ - how can I find out what my gear ratio is? And, now that I'm towing a heavy camper - I'm guessing I don't have a transmission cooler either - so are they easy to install, or something a shop should really do?
I have an '08 LTZ with 5.3 flex fuel engine and 4 spd auto trans. It has 3:73 gears, and if your truck is equipped the same way , it probably has the same gears. You could just call the dealership to find out for sure. How heavy is your camper? I am looking at a 26' travel trailer that weighs about 6,100 lbs empty. The truck does not have an aux trans cooler, but GM sells one for under a hundred bux (I have already looked into it). At my dealership, the total will be $250.00 -$300.00 with installation. My tranny got up to over 200 degrees towing a 2,000 lb pop up, so I figure the cooler is necessary for towing anything heavier.
Post your results, I would like to know how you turn out!