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 MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 718 (HEATING, VENTILATION & AIR CONDITIONING)REPAIR INSTRUCTIONSCOMPRESSOR CONTROL VALVE ASSEMBLY INSTALL (V5 - DIRECT MOUNT)
1999 GMC Forward Control 5.7 R, Automatic
Compressor Control Valve Assembly Install (V5 - Direct Mount)
1999 GMC Forward Control 5.7 R, AutomaticSECTION Compressor Control Valve Assembly Install (V5 - Direct Mount)
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
Tools Required
J 41790 Compressor Holding Fixture
- Coat the control valve O-rings with clean 525 viscosity refrigeration oil.
- Push the compressor control valve into the compressor with thumb pressure.
- Using internal snap ring pliers, install the compressor control valve retaining ring.
Ensure that the retaining ring is properly seated in the ring groove.
- Remove the compressor from the J 41790 .
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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.