Question about 1990 Chevrolet S-10 Blazer

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90 blazer s-10

The brakes pedal goes to the floor but it fluids are full

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The brakes need to be bled to get any and all air out of the line... if you can get an actuall pedal by pumping them... there is air in the line, or the line is bad... try getting the brakes bled first... then if that doesn't help have a mechanic check out the lines and the master cylinder.

Posted on Oct 27, 2008

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4 Answers

Brake pedal goes to floor vehicle still stops


Is the brake light on? Check your fluid level. Pedal going to the floor could be because of a leak in the hydrolic system line, hoses, caliper, wheel cylinders, master cylinder internal and external leaks. Can also be because of over sized drums and/or under adjusted brake shoes.

Jun 13, 2014 | 2000 Chevrolet Blazer

1 Answer

Brake issue.... turn left till steering pulses and brakes go to floor, and master cylinder bubbles... what would cause that. I bleed all brakes and all good, then random turn or out of the blue no...


It sounds like you have a faulty Electro-Hydraulic Control Unit (EHCU) or a Brake Pressure Modulator Valve (BPMV). Air is trapped in the valve body and air is much harder to get out of the master cylinder than it is the lines. You can try this method to help troubleshoot.

This is out of the Online GMsevice manual for a 2001 Blazer with 4-WD
Use the two-person bleed procedure under the following conditions:

Raise the vehicle in order to access the system bleed screws.
Bleed the system at the right rear wheel first.
Install a clear hose on the bleed screw.
Immerse the opposite end of the hose into a container partially filled with clean DOT 3 brake fluid.
Open the bleed screw 1/2 to one full turn.
Slowly depress the brake pedal. While the pedal is depressed to its full extent, tighten the bleed screw.
Release the brake pedal and wait 10-15 seconds for the master cylinder pistons to return to the home position.
Repeat the previous steps for the remaining wheels. The brake fluid which is present at each bleed screw should be clean and free of air.
This procedure may use more than a pint of fluid per wheel. Check the master cylinder fluid level every four to six strokes of the brake pedal in order to avoid running the system dry.
Press the brake pedal firmly and run the Scan Tool Automated Bleed Procedure . Release the brake pedal between each test.
Bleed all four wheels again using Steps 3-9. This will remove the remaining air from the brake system.
Evaluate the feel of the brake pedal before attempting to drive the vehicle.
Bleed the system as many times as necessary in order to obtain the appropriate feel of the pedal.

Good luck, i hope this helps.

Jul 05, 2011 | 2001 Chevrolet Blazer

1 Answer

What are the proper steps to bleeding your brakes on a 1990 vw golf deisel


For left hand drive vehicles: (If the car does not have ABS system you do not need any diagnostic equipment!)

IMPORTANT NOTE: You need using diagnostic equipment connected to the data link connector of the car in order to bleed the ABS block. Follow instructions by scantool equipment for bleeding the ABS block.


1. This bleeding procedure requires two people. Remove the brake system reservoir cap, and fill up with new brake fluid until "MAX" level is reached.
2. Lift the car, or use a channel for access under vehicle.
3. Put the gearbox in "N" - Neutral position, or in "P" - Parking position for automatic transmission.
4. Start the engine and push the brake pedal firmly for 4 - 5 times to the floor, and maintain the brake pedal pushed to the floor.
5. Begin with the rear right wheel. Another person remove the dust cap and loose the brake caliper bleeding screw until the brake pedal goes to the floor. At this moment maintain the brake pedal pushed to the floor, engine idling, and tight the brake caliper bleeding screw. Use a plastic hose: one end connected to the brake caliper bleeding screw, and another end inside a recovery bottle for used brake fluid.
6. Repeat steps no.#4 and no.#5 until no air flows through the brake caliper bleeding screw. Tight the brake caliper bleeding screw, and put the dust cap in their place.

IMPORTANT NOTE: All the time check the brake fluid level in the brake system reservoir, and fill up if necessary!

7. Push the brake pedal firmly for 4 - 5 times to the floor, and maintain the brake pedal pushed to the floor, engine idling.
8. Continue with the rear left wheel. Another person remove the dust cap and loose the brake caliper bleeding screw until the brake pedal goes to the floor. At this moment maintain the brake pedal pushed to the floor, engine idling, and tight the brake caliper bleeding screw. Use a plastic hose: one end connected to the brake caliper bleeding screw, and another end inside a recovery bottle for used brake fluid.
9. Repeat steps no.#7 and no.#8 until no air flows through the brake caliper bleeding screw. Tight the brake caliper bleeding screw, and put the dust cap in their place.

IMPORTANT NOTE: All the time check the brake fluid level in the brake system reservoir, and fill up if necessary!

10. Push the brake pedal firmly for 4 - 5 times to the floor, and maintain the brake pedal pushed to the floor, engine idling.
11. Continue with the front right wheel. Another person remove the dust cap and loose the brake caliper bleeding screw until the brake pedal goes to the floor. At this moment maintain the brake pedal pushed to the floor, engine idling, and tight the brake caliper bleeding screw. Use a plastic hose: one end connected to the brake caliper bleeding screw, and another end inside a recovery bottle for used brake fluid.
12. Repeat steps no.#10 and no.#11 until no air flows through the brake caliper bleeding screw. Tight the brake caliper bleeding screw, and put the dust cap in their place.

IMPORTANT NOTE: All the time check the brake fluid level in the brake system reservoir, and fill up if necessary!

13. Push the brake pedal firmly for 4 - 5 times to the floor, and maintain the brake pedal pushed to the floor, engine idling.
14. Continue with the front left wheel. Another person remove the dust cap and loose the brake caliper bleeding screw until the brake pedal goes to the floor. At this moment maintain the brake pedal pushed to the floor, engine idling, and tight the brake caliper bleeding screw. Use a plastic hose: one end connected to the brake caliper bleeding screw, and another end inside a recovery bottle for used brake fluid.
15. Repeat steps no.#13 and no.#14 until no air flows through the brake caliper bleeding screw. Tight the brake caliper bleeding screw, and put the dust cap in their place.
16. Now the brakes are bleeded. Check the brake fluid level in the reservoir. Fill up with new brake fluid until "MAX" level is reached. Put back the brake reservoir cap.
17. Test the car brake system. The brake pedal movement no more than 1/3 of total stroke until the floor, when brake pedal is applied. Maximum admissible is 1/2 of total stroke.

Dec 06, 2010 | Volkswagen Golf Cars & Trucks

1 Answer

My parking brake light is on and i cant get it to go off its not engaged and i checked the switch its not it. can you help?? its a '91 chevy s10 blazer 4.3 fuel injected 2x2


The brake light can come on for two reasons. I is the brake pedal is engaged witch you have found is not the case. The other is because the brake fluid is low or the sensor that monitors brake fluid level is defective.

Check the brake fluid level, if its full unplug the switch and see if it goes out. I'm not sure if the switch completes the circuit when the level is low or opens the circuit but its worth a shot.

Sep 25, 2010 | 1991 Chevrolet S-10 Blazer

1 Answer

Just replaced back brakes on 85 chevey s-10 blazer and back brake line on passenger side. now there is no back brakes or preassure and fluid is full what would cause this and how do i fix


Cause is air in brake lines, correction is to bleed the rear brakes. Get a buddy to pump the pedal then open the bleeded scres on the rear wheels one at a time. Do this on each wheel 3 or 4 times and see if it gets better. Be sure to keep the brake fluid full, as you pump the pedal the fluid will go down.

Aug 19, 2010 | 1985 Chevrolet S-10 Blazer

1 Answer

Brake pedal goes all the to the floor. can not


Check the reservoir to be sure the fluid is full. If not, top it off and try it again. If there's still trouble building pressure, pump the brakes a bunch of times, and then check around each wheel for fluid on the ground. If you see none, it's possible that you have a break in the line somewhere through the chassis and that the fluid is leaking out inside. If you see no evidence of leakage, and the reservoir is still full, you need a new brake master cylinder - what will have happened is that the diaphragm around the plunger inside the master cylinder (which moves through the cylinder when you push the pedal, and forces fluid out to the wheels) has a hole or tear in it, so instead of pushing the fluid out to the brakes, the plunger simply moves through the fluid. It never builds pressure, and your brakes don't work.

Dec 22, 2009 | 1992 Cadillac DeVille

2 Answers

Brakes are gone


check ur brake lines for posible leaks. also make sure to bleed your brakes after you put fluid into it or else the air won't come out of the brake lines causing ur pedal to still go to the floor

May 27, 2009 | 1998 GMC Blazer

1 Answer

Brake pedal will go all the way to the floor


make sure brake fluid is full. then pump brakes for one minuite check the fluid to see if it went down or stayed full. if it went down then check the system for a leak . if it stays full then you will need a new mastercylender . i dont think you have a vacum problem cause this causes a verry stiff brake pedal not one that goes to the floor

Dec 26, 2008 | 1993 Ford Crown Victoria

1 Answer

No brake!


also check the brake booster usually when it goes bad the pedal goes to the floor causing no brakes.....try replacing that.....also a vacuum leak could cause that....are you loosing brake fluid at all besides when you bleed the brakes? let me know

Jul 05, 2008 | 1994 Chevrolet S-10 Blazer

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