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 MANUALSCHEVROLET1990LUMINA APV V6-191 3.1LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLEFLUID PRESSURE SENSOR/SWITCHSERVICE AND REPAIR
1990 Chevrolet Lumina APV V6-191 3.1L
Fluid Pressure Sensor/Switch: Service and Repair
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Service and Repair
Fig. 12 Pressure Switch:
1. Remove oil pan and gasket.
2. Remove oil strainer and O-ring seal.
3. Remove wire harness, Fig. 12.
4. Disconnect wires from governor pressure switch.
5. Remove governor pressure switch from auxiliary valve body.
6. Disconnect wires from third gear clutch pressure switch.
7. Remove third gear clutch pressure switch from auxiliary valve body.
8. Reverse procedure to install.
RENDER: 1.0x
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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.