1998 Chevrolet Astro Owner's Manual - Page 330

Rear Axle Capacity Standard Rear Axle ...3.5 pint (1.7 L) Locking RearAxle Air Conditioning Refrigerant Capacity mPe System Quantity* 2 lbs. (0.91 kg) 3 lbs, (1.36 kg) ... ... 3.5 pint (1.7 L) R- 134a R- 134a C-60** C-69*** Air Conditioning Refrigerants Not all air conditioning refrigerants are the same. If the air conditioning system in your vehicle needs refrigerant, be sure theproper refrigerant is used. If you're not sure, ask your dealer. Refrigerant should be added only by a qualified N C technician. *All quantities are approximate. **Front A/C only. ***Front and Rear A/C. NOTICE: R-134a refrigerant is not compatible with R-12 refrigerant in an air conditioning system. in R-12 an R-134a systemwill cause compressor failure, refrigerant oil sludge poor air conditioning or system performance. 6-68