Jessie, Kevin and George, thanks for your in put, I used 2.25 lbs of 134a, when I opened the AC Delco accumulator box it had 2 labels 2.0 and 2.25 lbs. used the later and the system works great, 95 OST and 45 outlet temp. on the road M2 blower speed. Guess the... Login to read more.