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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1990LUMINA APV V6-191 3.1LREPAIR AND DIAGNOSISBRAKES AND TRACTION CONTROLHYDRAULIC SYSTEMBRAKE MASTER CYLINDERSERVICE AND REPAIR
1990 Chevrolet Lumina APV V6-191 3.1L
Brake Master Cylinder: Service and Repair
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Service and Repair
Removal
1. Disconnect electrical connector from fluid level sensor.
2. DisconnectBrake pipes from master cylinder. Plug open pipes to prevent fluid loss and contamination.
3. Remove two attaching nuts.
4. Remove Master cylinder.
Installation
1. Install master cylinder with attaching nuts to 27 Nm (20 lb.ft.).
2. Connect Brake pipes to 20 Nm (15 lb.ft.).
3. Connect Electrical connector to fluid level sensor.
4. Fill master cylinder to proper level with clean brake fluid. Proper level is to the MAX fill indicator level in opening on top reservoir.
5. Bleed hydraulic system.
6. Recheck fluid level.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.