I Noticed my A/C started to NOT cool or chill over a five day period. It got to a lace where the outdoor temperature had reached 98 (105 with humidity). I started by checking the freon level which seemed to be just fine. That left me to be sure that my internal temperature and vent settings were set accurately for cooling. I checked and they all were set properly. Later today, I drove the truck out to run some errands and my mind was telling to check the freon level again. So, I did, and it turned out that the freon level was really low. Im thinking that because I use off street parking on a uneven street (vehicle leans to the left when parked), that this may have caused an incorrect reading as the refrigerant (already low) might have moved to one side. Long story short, I ended using 1, and 1/2 cans of 120z 134a refrigerant and it began to blow cold in all vents. I will be monitoring it over the next few days to be sure that there no other issues or leaks. Hopefully this will help someone with same issue or like problem.