Pontiac 2004 Vibe - Manual (Page 236)

Then, follow these steps:
1. Remove the filler plug.
2. Check that the lubricant level is up to the bottom of
the filler plug hole.
3. If the fluid level is good, install the plug and be sure
it is fully seated. If the fluid level is low, add more
fluid as described in the next steps.
How to Add Fluid
Here’s how to add fluid. Refer to the Maintenance
Schedule to determine what kind of fluid to use. See
Part D: Recommended Fluids and Lubricants on
page 6-26.
1. Remove the filler plug.
2. Add fluid at the filler plug hole. Add only enough
fluid to bring the fluid level up to the bottom of the
filler plug hole.
3. Install the filler plug. Be sure the plug is fully
seated.
Hydraulic Clutch
The hydraulic clutch linkage in your vehicle is
self-adjusting. The master cylinder reservoir is filled
with DOT-3 brake fluid.
It is not necessary to regularly check the fluid unless
you suspect there is a leak in the system. Adding fluid
won’t correct a leak.
The clutch and brake master cylinder use the same
reservoir.
A fluid loss in this system could indicate a problem.
Have the system inspected and repaired.
5-26