hello, can someone tell me and post a picture where can refill my A/C on my 2003 impala,

i do not know where to attach the hose to refill the unit, many thanks,

 

The Bigger Of The 2.. The Suction Line ..I Assume Refrigerant Is R134a...Follow The Instructions On The Can . Do Not Use The Stuff With Stop Leaks Or Dyes ..Make Sure Your Air Is On High For At least 10 Minutes And Running While You Charge, And Do It Slow , Little Spurts Here And There. Do npt Just Let It Rip. And Do Not Over Charge. That is The Biggest Mistake People Make. Watch A Few Youtube Videos. Im A Certified HVAC TECH At General Motors. 608 And 609 Certified

 

look on the fire wall right behind the intake. i belive its in the same spot on the 3400 and 3800.

 

If your A/C system is drained out of R-134A, you'll need to vacuum the air out with an A/C pump, before you add new R-134A. You must get all the air and moisture out of your system, or else it will self-destruct one day. You also will not get a good cold A/C blast in the cab with too much air in the system. Always wear glasses or goggles when working on an A/C system as well.