Any time the brake pedal is hard to press then you need to check and see if the brake booster is functioning properly.
The master cylinder on a 1999 suburban is pretty easy to change. Under the dash, disconnect the clutch pedal from the cylinder rod. disconnect the brake lines from the master cylinder and allow to drain into a container. Unbolt the cylinder and remove. Install the new cylinder and connect the lines and rod back up. Add new fluid, and bleed the slave cylinder to finish the installation.
IS it the BRAKE LIGHT or the Parking Brake Light? If it is the BRAKE LIGHT, then your pedal must be going down far enough to hit a sensor that sets off the brake light to tell you your brakes need serviced. Normally this means you are low on brake fluid. If you are low on brake fluid FIND OUT WHY! You may have excessive brake pad wear, or a leaking brake cylinder, or your master cylinder may be going out. If you keep pumping the brakes and then stand on it hard, feel for the pedal to eventually go soft, if it does, then normally the seals in the master cylinder are going out. If you pump the brakes and the pedal never gets hard, then you have a serious brake fluid leak. If the Parkign Brake light stays on, then your parking brake is not fully releasing, at least where the contacts are to remind you it is on. This can be adjusted.
The cable that connects the peddle to the throttle is worn. There is a leak in the brakes somewhere, the common place is that is hidden is the back of the master cylinder.
It appears so, since The Sunroof Doctor has a replacement motor that will fit 1996- 2002 SL models Sunroof Motor 1997-2002 Saturn SC (2 & 3 Door) 1996-2002 Saturn SL (4 Door) Special! New replacement motor available at this price until our stock is gone. You reuse your original connector or hard wire to your harness $81.55
Hardness in the brake pedal can because by low brake fluid. Air in the brake lines can also cause the pedal to push hard.
Power brake booster failure or vacuum supply to booster insufficient.
Usually when a brake pedal feels more stiff than usual, there is a vacuum leak. The brake lines probably should be bled.
BAD power brake booster are a vaccum leak at the booster.
If its anything like a 1996, the fuel filter is located on the drivers side of the firewall. It however is a Saturn only part,means you get the part from Saturn.It has the fuel lines attached to it.They are plastic and black. 1 unhooks from the fuel intake and the other 1 is under the car. Not hard at all to change this,just a pest that it only comes from Saturn. Luck
It really is not hard if it is the same as a 1994! I've had to change mine twice! All you do is unscrew the brake lines from the Master Cylinder, unplug the two sets of wires that are underneath the lines. Then unbolt the two bolts that are under the brake fluid reservoir. The unit should lift right up and off! Easy as 1-2-3!!
A hard brake pedal can be caused by several different factors. It can be as simple as the brake pedal getting caught on something to the power brake booster being bad. You could also have a brake pad or shoe that is sticking, causing the brake fluid to boil. When brake fluid boils, it expands and can cause the hard brake pedal that you feel. A brake pedal that is hard to press can also be caused by a build-up of water in the brake line. The water in the brake line lowers the boiling point of the brake fluid. A hard brake pedal can also be the result of a restriction in the brake line, such as a bent brake line or foreign material in the brake fluid. The most common cause of a hard brake pedal is the sticking brake pad or shoe, causing the brake fluid to boil. Tracking down what is causing the hard brake pedal can be frustrating, to say the least. Take the vehicle for a drive and when you come back, feel your brake lines near the wheels. Caution: The line may be very hot! If one is extremely hot, you may have just found the culprit causing the hard brake pedal.
Here is how I did it. they can be hard. make sure emergency brake is off. I used a small bubble jack and just went around it slowly until it popped off.
Air in a brake line or a bad master cylinder could cause this. Bleed the brake lines if you have been working on any brake cylinder. If this happened without any warning, the master brake cylinder is probably the cause and should be replaced.
sounds like you have a leak in your Brake Boost Controler, you should also check to see if there is any leaks in the vacuum lines that connect the engine to the brake booster.
Brake fluid could be low. Check for leaky brake lines under the car also. Quite often older cars have rusty brake lines that leak fluid sometimes just a little bit but these should be repaired as they can blow apart when you hit the brakes hard and cause an accident. Check your emergency brake and make sure it as pulled all the way off also.
if so equiped make sure that the vacuum lines are properly installed.