GM Cadillac Deville_Fleetwood_ELD_Seville 1990-1998

Master Cylinder



When adding or replacing the brake fluid, always use a top quality fluid, such as DOT-3. DO NOT allow the brake fluid container or master cylinder reservoir to remain open for long periods; brake fluid absorbs moisture from the air, reducing its effectiveness and causing corrosion in the lines.

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Fig. The master cylinder cap informs you to use ONLY DOT 3brake fluid. Mixing different types of brake fluid can havedisastrous results


The master cylinder, located in the left rear section of the engine compartment, consists of an aluminum body and a reservoir with minimum fill indicators. The fluid level of the reservoirs should be kept near the top of the observation windows.

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Fig. You can use a clean turkey baster to add/remove brake fluid to/from the master cylinder

Avoid spilling brake fluid on any of the vehicles painted surfaces, wiring cables or electrical connectors. Brake fluid will damage paint and electrical connections. If any fluid is spilled on the vehicle, flush the area with water to lessen the damage.

A sudden decrease in the fluid level indicates a possible leak in the system and should be checked out immediately.