your vehicle being a 1500 will have the 4l60 tranny ..with the deep pan m30 you will need 5quarts of dexronVI....do not use dexron III....obsolete fluid !
the deep pan is about 1.5 inches high...you will need the correct filter as the deep pan has a different filter...
last I checked NAPA was the only store that had the correct tranny filters in my area that matched the oem GM filter exactly,,in every way..
some of these other filters are not designed the same ,,but will still work..
napa gm deep pan filter kit 1-8567.....pan gasket for any 4l60 tranny 1-7381 rubber [reuaseable] so far working on 4X....torque to 7ft lbs...I used a 1/4 inch rachet torque wrench..never leaks holds screws/gasket in place when positioning pan to assemble.. total cost 30.oo approx..
dealer wants 55.oo just for the same filter.