It takes the green Antifreeze
GREEN color.
That would be the 4L60E transmission
About 14 on the HWY. 8-9-10 around town.
That would be the 4L60E And the E stands for ELECTRONIC.That is the ONLY transmission that will work in that year.
Dexcool or some call it Deathcool.
On both the gas and diesel engines they use DEX-COOL antifreeze mixed with distilled water..........
R134a
A/C Delco.
That would be the 4L60E
Dexcool is recommended.
Green