In 1998, Chevrolet offered the C2500 pickup that came standard with a 5.0 L. V-8 engine that produced 230 horsepower. When repairing the air-conditioning on the 1998 C2500, it is imperative to follow the proper specifications to avoid future failure.
The 1998 C2500 uses R134a refrigerant to cool the air in the cabin and it is measured in ounces. The pickup requires 32 oz. of refrigerant in a standard cab model and 36 oz. in a crew cab model.
The 1998 C2500 uses polyalkylene glycol (PAG) oil as the lubricant for the air-conditioning compressor. The C2500's system requires 8 oz. of PAG oil.
The C2500's air-conditioning system has both a high- and low-pressure side. The high-pressure side of the system requires an operating pressure of 300 to 409 psi, depending on ambient temperature, and the low side requires 27 to 45 psi, depending on ambient temperature.
The outlet temperature -- the temperature coming from the vents in the cabin -- varies depending on the outside temperature. The air coming from the vents should range between 46 degrees and 68 degrees F.
- "Mitchel1 OnDemand 5"; 1998 Chevrolet C2500 A/C System Specifications: Mitchell Repair Information Company
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