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 MANUALSBUICK1990REGAL CUSTOM, 3.8 L, 4T60/ME9REPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMESEATS - POWERREMOVAL & INSTALLATIONLUMBAR MOTOR & PUMP ASSEMBLY
1990 Buick Regal Custom, 3.8 L, 4T60/ME9
Lumbar Motor & Pump Assembly
1990 Buick Regal Custom, 3.8 L, 4T60/ME9SECTION Lumbar Motor & Pump Assembly
- Disconnect battery ground cable. Remove seat cushion. Remove 4 bolts retaining cushion frame panel to adjuster. Disconnect electrical connector and remove seat from vehicle.
- Disconnect electrical and pneumatic harness connectors at motor. Remove motor and pump assembly to frame attaching parts. Remove motor from seat cushion frame. To install, reverse removal procedure. Check operation of motor and pump.
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.