I looked up the part number for components for both the Tahoe withOUT rear air and a pickup. The evaporator, accumulator and compressor are all the same. The only component different is the condenser. Could the different condenser account for .75 or 1.0 more pounds of refrigerant? I wish I had a factory service manual....So AllData is not showing SUV's: just pickups. The factory sticker for R134a at 3lbs is gospel, period.