How much freon does a 1990 suburban hold?

A 1990 Chevrolet Suburban typically holds about 3 to 4 pounds of R-12 Freon for its air conditioning system. However, if the system has been retrofitted to use R-134a, it may hold slightly less, around 2.5 to 3 pounds. It's always best to check the vehicle's service manual or a label under the hood for the exact specifications.