GM Camaro/Firebird 1993-1998 Repair Guide

Brake Master Cylinder



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

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


See Figures 1, 2, 3, 4, 5 and 6

The master cylinder is located in the left rear section of the engine compartment. The brake master cylinder consists of an aluminum body and a translucent nylon reservoir with minimum fill indicators.

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Fig. Fig. 1: The brake master cylinder reservoir maximum fill line is located on the neck of the reservoir-1993 vehicle shown

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Fig. Fig. 2: Location of the brake master cylinder fluid minimum and maximum fill lines-1997 vehicle shown

  1. Check the master cylinder body for cracks. Inspect the area around the master cylinder for brake fluid. Leaks are indicated if there is at least a drop of fluid. A damp condition is not normal.
  3. Inspect the level of the brake fluid to assure it is at the correct height. Clean the top of the reservoir cap so that all dirt is removed. Remove the cap(s) or reservoir cover and the reservoir diaphragm.

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Fig. Fig. 3: Use a rag to clean the area around the brake master cylinder reservoir cap

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Fig. Fig. 4: Remove the brake master cylinder reservoir cap and check the fluid level

  1. Inspect the brake fluid level. Add clean DOT-3 brake fluid as required to bring the fluid level to the line located inside the neck of the reservoir fill opening.

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Fig. Fig. 5: Note that the brake master cylinder lid has a diaphragm on it

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Fig. Fig. 6: If the brake fluid is low, add DOT 3 fluid from a fresh, sealed container

  1. Install the reservoir cap.

Any sudden decrease in the fluid level indicates a possible leak in the system and should be checked out immediately. Do not allow brake fluid to spill on the vehicle's finish; it will remove the paint. In case of a spill, flush the area with water and mild soap.