Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1999CORVETTE 2D COUPE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)GENERAL SERVICINGHVAC SYSTEM - GENERAL SERVICINGEVACUATING A/C SYSTEMJEEP
1999 Chevrolet Corvette 2D Coupe, Standard
Evacuating A/C System: Jeep
1999 Chevrolet Corvette 2D Coupe, StandardSECTION Jeep
- Connect approved recovery/recycling equipment and manifold gauge set. Fully open manifold gauge set low-side and high-side valves, and start vacuum pump. Operate vacuum pump until low-side vacuum reading of 26 in. Hg or more. Close all valves and turn vacuum pump off. Observe vacuum gauge, go to next step.
- If A/C system maintains specified vacuum for 5 minutes, open low-side and high-side valves, restart vacuum pump and operate for an additional 10 minutes. Close all valves. Turn vacuum pump off and disconnect pump.
- If A/C system cannot get to or maintain specified vacuum, check for a defective vacuum pump or leak in A/C system or gauge set. See LEAK TESTING . Repair or replace components as necessary.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.