What is the brake bleeding procedure - 2007 Chevrolet Suburban Three-Quarter-Ton LS

If the standard bleeding procedures do not produce an acceptable pedal you will need a scantool that can activate the automated ABS bleed and a pressure bleeding system.
To bleed the brakes use the standard pattern of RR,LR,RF,LF

ABS Automated Bleed Procedure
Caution: Refer to Brake Fluid Irritant Caution in Service Precautions.
Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Service Precautions.
Important: In most circumstances a base brake bleed is all that is required for most component replacements (such as wheel cylinders, calipers, brake tubes, and master cylinder) except for brake pressure modulator valve (BPMV) replacement.
The following automated ABS bleed procedure is required when one of the following occur:
Manual bleeding at the wheel cylinders does not achieve the desired pedal height or feel.
BPMV replacement
Extreme loss of brake fluid has occurred.
Air ingestion is suspected.
If none of the above conditions apply, use standard bleed procedures.
The auto bleed procedure is used on BOSH 5.3 equipped vehicles. This procedure uses a scan tool to cycle the system solenoid valves and run the pump in order to purge the air from the secondary circuits. These secondary circuits are normally closed off, and are only opened during system initialization at vehicle start up and during ABS operation. The automated bleed procedure opens these secondary circuits and allows any air trapped inside the BPMV to flow out toward the wheel cylinders or calipers where it can be purged out of the system.
Automated Bleed Procedure
Preliminary Inspection
Inspect the battery for full charge, repair the battery and charging system, as necessary.
Connect a scan tool to the data link connector (DLC) and select current and history DTCs. Repair any DTCs prior to performing the ABS bleed procedure.
Inspect for visual damage and leaks and repair, as needed.
Preliminary Setup
Raise and vehicle on a suitable support.
Turn the ignition switch to the OFF position.
Remove all 4 tires, if necessary.
Connect the pressure bleeding tool according to the manufacturer's instructions.
Turn the ignition switch to RUN position, engine off.
Connect a scan tool and establish communications with the ABS system.
Pressurize the bleeding tool to 206 - 241 kPa (30 - 35 psi) .
Performing the Automated Bleed Procedure
Notice: The Auto Bleed Procedure may be terminated at any time during the process by pressing the EXIT button. No further Scan Tool prompts pertaining to the Auto Bleed procedure will be given. After exiting the bleed procedure, relieve bleed pressure and disconnect bleed equipment per manufacturers instructions. Failure to properly relieve pressure may result in spilled brake fluid causing damage to components and painted surfaces.
With the pressure bleeding tool at 206 - 241 kPa (30 - 35 psi) , and all bleeder screws in closed position, select Automated Bleed Procedure on the scan tool and follow the instructions.
The first part of the automated bleed procedure will cycle the pump and front release valves for one minute. After the cycling has stopped the scan tool will enter a cool down mode and display a 3 minute timer. The auto bleed will not continue until this timer expired, and cannot be overridden.
During the next step, the scan tool will request the technician to open one of the bleeder screws. The scan tool will then cycle the respective release valve and pump motor for one minute.
The scan tool will repeat step 3 for the remaining bleeder screws.
With the bleeder tool still attached to the vehicle and maintaining 241 kPa (35 psi) , the scan tool will instruct the technician to independently open each bleeder screw for approximately 20 seconds. This should allow any remaining air to be purged from the brake lines.
When the automated bleed procedure is completed the scan tool will display the appropriate message.
Install all 4 tires, if necessary refer to Tire and Wheel Removal and Installation.
Remove pressure from the pressure bleeding tool and then disconnect the tool from the vehicle.
Depress the brake pedal to gage pedal height and feel. Repeat steps 1-8 until the pedal is acceptable.
Remove the scan tool from the DLC connector.
Install.
Lower the vehicle.
Inspect the brake fluid level in master cylinder.
Road test the vehicle while making sure the brake pedal remains high and firm.
If the vehicle is equipped with a traction control system (TCS), the scan tool will cycle both the ABS and the TCS solenoid valves. This bleed procedure is the same as above.

how on earth would the blind know what is wrong.?
scan it? yet?
btw, newer cars cut cruise feature for any signs of danger.
new laws...
the traction needs ABS to work ,so forget that and fix ABS.
ABS needs 2 things to work , brakes and ABS.

so if brakes are bad, then ABS will get upset.
after all, if it cant brake right, how can the puter save you?
if brakes are known to be ok (inspections work here)
but in this case it was BREACHED by you, with out reading the book first.
then scan the ABS. (omg? code for dead sensor?) nah, you caused it..
easy

ABS resets every key on. so...
my guess, if ABS was happy before your actions( you never said)
then you got air in to the system. and failed to follow the FSM instructions on bleeding brakes, in ABS car.

front caliper, did you block the hose with cap, so it didn't allow air to the modulator? oops... never just let them drip... or . max pain.
bleed it again, (using any or all 5 ways to do so, bleeding is skill thing) (many modulators can not just be simply bled)

now Ill quote the 2012 fSM for you , under brakes

Data: -----------------------------------------------------------------
ABS Brake Bleeding
STANDARD PROCEDURE - ABS BRAKE BLEEDING

ABS system bleeding requires conventional bleeding methods plus use of a scan tool. The procedure involves performing a base brake bleeding, followed by use of the scan tool to cycle and bleed the HCU pump and solenoids. A second base brake bleeding procedure is then required to remove any air remaining in the system.

Perform base brake bleeding, (Refer to Brakes - Standard Procedure)(Refer To List 1).

Connect scan tool to the Data Link Connector.

Select ANTILOCK BRAKES, followed by MISCELLANEOUS, then ABS BRAKES. Follow the instructions displayed. When scan tool displays TEST COMPLETE, disconnect scan tool and proceed.

Perform base brake bleeding a second time, (Refer to Brakes - Standard Procedure)(Refer To List 1).

Top off master cylinder fluid level and verify proper brake operation before moving vehicle.

To Bleed Air From Brake Lines.

Click the link below For Step by step Procedure:
http://carrepairworld.blogspot.com/2015/04/air-in-brake-lines.html

http://www.allcarhelp.com/2015/04/rear-brake-bleeding-procedure.html

This Will Help You.
Thanks.

Hi there:
I suggest to check this procedure, when the hydraulic brake system must be bled whenever a fluid line has been disconnected because air gets into the system.

A leak in the system may sometimes be indicated by a spongy brake pedal. Air trapped in the system is compressible and does not permit the pressure applied to the brake pedal to be transmitted solidly through the brakes. The system must be absolutely free from air at all times. If the master cylinder has been overhauled or a new cylinder has been installed, bleed the cylinder on a bench before installation. When bleeding brakes, bleed at the wheel most distant from the master cylinder first, the next most distant second, and so on. During the bleeding operation the master cylinder must be kept at least 3 / 4 full of brake fluid.


The ABS bleeding procedure is different from the conventional method. It consists of the following three steps:
Step 1: Conventional manual brake bleed.
Step 2: Bleeding the system using the DRB scan tool.
Step 3: An additional conventional manual brake bleed.

The recommended ABS bleeding procedure is as follows:

1. To bleed the brakes, first carefully clean all dirt from around the master cylinder filler cap. Remove the filler cap and fill the master cylinder with DOT 3 brake fluid to the lower edge of the filler neck.
2. Bleed the master cylinder first. Have a helper operate the brake pedal while bleeding each master cylinder fluid outlet line. Do not allow the master cylinder to to run out of fluid,as this will allow additional air to be drawn into the cylinder.
3. Bleed the brake system in the following sequence:
   1. Master cylinder
   2. HCU valve body (at fluid lines)
   3. Right rear wheel
   4. Left rear wheel
   5. Right front wheel
   6. Left front wheel
4. Clean off the bleeder connections at all four wheel cylinders. Attach the bleeder hose to the right rear wheel cylinder bleeder screw and place the end of the tube in a glass jar, submerged in brake fluid.
5. Open the bleeder valve 1/2 - 3/4 of a turn.
6. Have an assistant depress the brake pedal slowly and allow it to return. Continue this pumping action to force any air out of the system. When bubbles cease to appear at the end of the bleeder hose, close the bleeder valve and remove the hose.
7. Check the level of fluid in the master cylinder reservoir and replenish as necessary.
8. After the bleeding operation at each wheel cylinder has been completed, fill the master cylinder reservoir and replace the filler plug.

Do not reuse the fluid which has been removed from the lines through the bleeding process because it contains air bubbles and dirt.

1. Perform the "Bleed Brake'' procedure with the DRB II scan tool. This procedure is described in the DRB II software information and diagnostic guide.
   1. Attach the DRB II scan tool to the diagnostic connector.
   2. Run the Bleed Brake procedure as described in the DRB II tester guide.
2. Repeat the conventional bleeding procedure as previously outlined.
3. Fill the master cylinder reservoir to the proper level.
4. Check the brake operation.

Hope this helps.

Master cyclender working ok?

1. Raise the vehicle on a suitable support.
2. Remove all four tire and wheel assemblies.
3. Inspect the brake system for leaks and visual damage.
4. Inspect the battery state of charge.
Install a scan tool.
5. Turn ON the ignition, with the engine OFF. With the scan tool, establish communications with the electronic brake control module (EBCM). Select Special Functions. Select Automated Bleed from the Special Functions menu.
6. Bleed the base brake system. Follow the scan tool directions until the desired brake pedal height is achieved.
If the bleed procedure is aborted, a malfunction exists. Perform the following steps before resuming the bleed procedure:
7. 1. If a DTC is detected, check for the cause and repair as necessary.
   2. If the brake pedal feels spongy, perform the conventional brake bleed procedure again.
   
   
8. When the desired pedal height is achieved, press the brake pedal in order to inspect for firmness. Remove the scan tool.
9. Install the tire and wheel assemblies. Inspect the brake fluid level.
Road test the vehicle while inspecting that the pedal remains high and firm.

1. Raise the vehicle on a suitable support.
2. Remove all four tire and wheel assemblies.
3. Inspect the brake system for leaks and visual damage.
4. Inspect the battery state of charge.
5. Install a scan tool.
6. Turn ON the ignition, with the engine OFF.
7. With the scan tool, establish communications with the electronic brake control module (EBCM). Select Special Functions. Select Automated Bleed from the Special Functions menu.
8. Bleed the base brake system.
9. Follow the scan tool directions until the desired brake pedal height is achieved.

well, check the brake lines for leakage after adding brake fluid to the full mark. If the brake pedal goes all the way to the floor, it's likely there is a leak somewhere after the master cylinder. If the pedal gets hard after adding fluid, and pumping it several times with the car off, then the master cylinder is still ok.

If air has gotten into the master cylinder, it may have to be bled out on a bench, or using a scanner if that's the way your vehicle is.

Bleeding the Brake System (ABS) Auto Bleed Procedure NOTE: Perform a manual bleeding procedure. If the brake pedal height and firmness results are not achieved, perform the auto bleed procedure below.
NOTE: Perform this procedure when replacing the brake pressure modulator valve or electro-hydraulic control unit.

1. Perform the manual brake bleeding procedure. Refer to Bleeding the Brake System (non-ABS).
2. Check the master cylinder fluid level often to prevent running the system dry.
3. Press the brake pedal firmly and run the Scan Tool Automated Bleed Procedure (for Gas engines) once, or the Function Test (for Diesel engines) four times. Make sure to release the brake pedal between each test.
4. Perform the manual bleed procedure again. This should remove the remaining air from the brake system.
5. Bleed the system as many times as needed to obtain the appropriate feel of the brake pedal.

Bleeding the ABS System

Print


NOTE
This procedure requires the use of a scan tool.


NOTE
Performing the SYSTEM BLEED FUNCTION on the diagnostic tool drives trapped air from the hydraulic control unit (HCU). Subsequent bleeding removes the air from the brake hydraulic system to the bleeder screws.


NOTE
The engine must be running to provide adequate voltage to the HCU module during the anti-lock control portion of the system bleed.

1. Connect the diagnostic tool.

2. Start the engine and depress the brake pedal to half of the full travel position.

3. Access FUNCTION TEST mode and press the trigger to run the SYSTEM BLEED FUNCTION.

4. Manually bleed the brake hydraulic system.

5. Repeat the procedure performing a total of two diagnostic tool cycles and two manual bleed cycles. The bleed procedure is complete.


Hope helps.

Bench Bleed the M/C first, then do not let it run dry during system bleeding. Parts stores sell a kit that helps installed m/c bleeding.

Bleeding the Brake System (ABS) Auto Bleed Procedure NOTE: Perform a manual bleeding procedure. If the brake pedal height and firmness results are not achieved, perform the auto bleed procedure below.

1. Raise and support the vehicle.
2. Remove the tire and wheel assemblies.
3. Inspect the battery state of charge.
4. Install a scan tool.
5. Turn ON the ignition, with the engine OFF.
6. With the scan tool, establish communications with the ABS/TCS system. Select Special Functions from the ABS/TCS menu. Select Automated Bleed from the Special Functions menu.
7. Bleed the base brake system.
8. Follow the scan tool directions until the desired brake pedal height is achieved.
9. If the bleed procedure is aborted, a malfunction exists. Perform the following steps before resuming the bleed procedure:
10. If a DTC is detected, refer to Diagnostic Trouble Code (DTC) List and diagnose the appropriate DTC.
11. If the brake pedal feels spongy, perform the conventional brake bleed procedure again.
12. When the desired pedal height is achieved, press the brake pedal in order to inspect for firmness.
13. Remove the scan tool.
14. Install the tire and wheel assemblies.
15. Inspect the brake fluid level.
16. Road test the vehicle while inspecting that the pedal remains high and firm.

Bleeding ABS Automated Bleed Procedure NOTE: In most circumstances a base brake bleed is all that is required for most component replacements (such as wheel cylinders, calipers, brake tubes, and master cylinder) except for brake pressure modulator valve (BPMV) replacement.
The following automated antilock brake system (ABS) bleed procedure is required when one of the following occur:

• Manual bleeding at the wheel cylinders does not achieve the desired pedal height or feel.
• Replacement of the BPMV
• Extreme loss of brake fluid has occurred.
• Air ingestion is suspected.

NOTE: If none of the above conditions apply, use standard bleed procedures.
The auto bleed procedure is used on BOSH 5.3 equipped vehicles. This procedure uses a scan tool to cycle the system solenoid valves and run the pump in order to purge the air from the secondary circuits. These secondary circuits are normally closed off, and are only opened during system initialization at vehicle start up and during ABS operation. The automated bleed procedure opens these secondary circuits and allows any air trapped inside the BPMV to flow out toward the wheel cylinders or calipers where it can be purged out of the system.
Preliminary Inspection

1. Inspect the battery for a full charge.
2. Repair the battery and charging system as necessary.
3. Connect a scan tool to the data link connector (DLC) and select the current and history DTCs.
4. Repair any DTCs prior to performing the ABS bleed procedure.
5. Inspect for visual damage and leaks and repair as needed.

Preliminary Setup

1. Before servicing the vehicle refer to the precautions at the beginning of this section.
2. Raise and support the vehicle.
3. Turn the ignition switch to the OFF position.
4. Remove all 4 tires (if necessary)
5. Connect the pressure bleeding tool.
6. Turn the ignition switch to RUN position with the engine off.
7. Connect a scan tool and establish communications with the ABS system.
8. Pressurize the bleeding tool to 30-35 psi (206-241 kPa).

Automated Bleed Procedure
NOTE: The Auto Bleed Procedure may be terminated at any time during the process by pressing the EXIT button. No further Scan Tool prompts pertaining to the Auto Bleed procedure will be given.
CAUTION
After exiting the bleed procedure, relieve bleed pressure and disconnect bleed equipment per manufacturers instructions. Failure to properly relieve pressure may result in spilled brake fluid causing damage to components and painted surfaces.

1. With the pressure bleeding tool set to 30-35 psi (206-241 kPa) and all bleeder screws in closed position, select Automated Bleed Procedure on the scan tool and follow the instructions.
2. The first part of the automated bleed procedure will cycle the pump and front release valves for one minute.
3. After the cycling has stopped the scan tool will enter a "cool down" mode and display a 3 minute timer. NOTE: The auto bleed will not continue until this timer expired, and cannot be overridden.
   
4. During the next step, the scan tool will request the technician to open one of the bleeder screws. The scan tool will then cycle the respective release valve and pump motor for 1 minute.
5. The scan tool will repeat step 3 for the remaining bleeder screws.
6. With the bleeder tool still attached to the vehicle and maintaining 30-35 psi (206-241 kPa), the scan tool will instruct the technician to independently open each bleeder screw for approximately 20 seconds. This should allow any remaining air to be purged from the brake lines.
7. When the automated bleed procedure is completed the scan tool will display the appropriate message.
8. Install all 4 tires, if necessary.
9. Remove the pressure from the pressure bleeding tool
10. Disconnect the tool from the vehicle.
11. Depress the brake pedal to gauge pedal height and feel.
12. Repeat the procedure until the pedal is acceptable.
13. Remove the scan tool from the DLC connector.
14. Safely lower the vehicle.
15. Inspect the brake fluid level in master cylinder.
16. Road test the vehicle while ensuring the brake pedal remains high and firm.
17. If the vehicle is equipped with a traction control system (TCS), the scan tool will cycle both the ABS and TCS solenoids valves. This bleed procedure is the same as above.