R134a.
A 1999 model year vehicle uses R134a refrigerant (it's only Freon if it's manufactured by DuPont, who trademarked the name).
Where do I put freon in a 2007 chevy impala
What Ac refrigerant freon is required in 1989 BMW 7-Series? What Ac refrigerant freon is required in 1989 BMW 7-Series?
Freon is R12. Your 1997 Chevy uses R134 Refrigerant.
R134a
2.4 lbs (1.1 kg) of R-134A refrigerant.....
R134a Refrigerant
134A freon
R134a refrigerant.
It contains no Freon. It contains R134 Refrigerant. If it is low, that means it has a leak. It is illegal to add refrigerant without first repairing the leak. Take it to a professional for repair and recharge.
R-134A type refrigerant (not freon) can be added thru the service port of the low side of the A/C system (by the firewall, below the passenger wiper arm, behind the transaxle fluid level dipstick) with a recharging kit...
The 2005 Chevy Impala uses R-134a refrigerant for its air conditioning system. When servicing or recharging the system, it's important to ensure that R-134a is used, as older refrigerants like R-12 are not compatible and can cause damage. Always check the vehicle's manual or label under the hood for specific details regarding the refrigerant type and capacity.