Ive recently had to add a little brake fluid to my master cylinder, which was about 3/4 full.
Today I noticed that master cylinder has been leaking(now I know why I have to add!!)

How hard is it to change out, and what parts store should I get a new/reman one from??

_________________
1995 White Bonneville SE

188340 Miles as of 06/07/10, still running.........

LIM/UIM Work done 4/23/07 at 145000 miles...

They are not too hard to change, just remember to bench bleed it. 2 bolts and the lines to remove and then bleed the entire system when done . Bleed starting with the wheel farthest from the master cylinder and so on. Usually it will go: rear passenger, rear driver, front passenger, front driver.

As for where to get one it just depends on what you want to spend and if you can wait for shipping. There is Rockauto.com and GMpartsdirect.com.

yeah, bench bleed the master cyl before installing it. And the best way thereafter is to bleed all 4 wheels as stated above, until clean fluid without air bubbles comes out.

Or in a pinch, you don't need to bleed the wheel cyls, but this is at your own risk, although I have done it dozens of times:

Bench bleed the master cyl, bolt it to the booster. Have a helper slowly push the brake pedal to the floor and hold it there. Have something to catch the fluid, and make sure they go slow or you'll have a gusher all over you and the car. Then, with the pedal held to the floor, hook up and tighten the lines. Any air at the top of the lines should be sucked back into the master cyl and bubble harmlessly up when you slowly release the pedal. No need to bleed if all worked well. If the pedal is funny after a few pumps, then you have to bleed at each wheel.

_________________


1993 SE with SLE appearance package. Factory stock except for steering wheel buttons, AM/FM/CD from a '93SSEi and chrome wheels.
1999 Olds Eighty-Eight LS Anniversary Edition, my daily driver.
2004 Chrysler Minivan, wife's daily driver.