How do you recharge the air conditioning on a 1998 Pontiac Grand Am?
I speak with knowledge from my own 1998 Pontiac Grand Am, quad
4. Well, your lowside fitting is on the compressor and you will see
a blue cap on it. The lowside is the red cap that you will see
besides the water resevoir.
I will not go into specifics on how to test it as there are
plenty of places to look for that. However, for me, the hardest
part was finding that lowside, blue capped port. HTH. Chad