I changed my brake fluid and clutch fluid reservoirs yesterday, using a syringe to remove the old fluid. I then filled both of them back. Now I keep getting the following codes, and can't get rid of them! The brake light and traction control light stay illuminated as well.

1. Service Traction System
2. Service Active Handling
3. Low Brake Fluid

In the DIC, I get: 28-TCS C1247 H C

I keep resetting them, but they keep coming back, all of them! I even disconnected the battery for 40 minutes, hoping to clear all of the codes (the dealership told me once that if you leave it for 10 minutes, everything would reset and all of the codes would cleared).

Any ideas of how to get these reset without taking it to the dealer?

 

I have changed those fluids many times the same way without issue.
Are you sure you did not inadvertantly dislodged some electrical connectors in the process?

 

Try bleeding the brakes. Also check all connections as previously suggested.

 

Did you have the Ignition Switch on when you blead the brakes?
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Hydraulic Brake System Bleeding Manual
Caution
Refer to Brake Fluid Irritant Caution in Cautions and Notices.


Notice
When adding fluid to the brake master cylinder reservoir, use only Delco Supreme 11®, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container. The use of any type of fluid other than the recommended type of brake fluid, may cause contamination which could result in damage to the internal rubber seals and/or rubber linings of hydraulic brake system components.


Notice
Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Cautions and Notices.

Place a clean shop cloth beneath the brake master cylinder to prevent brake fluid spills.
With the ignition OFF and the brakes cool, apply the brakes 3-5 times, or until the brake pedal effort increases significantly, in order to deplete the brake booster power reserve.
If you have performed a brake master cylinder bench bleeding on this vehicle, or if you disconnected the brake pipes from the master cylinder, you must perform the following steps:
Ensure that the brake master cylinder reservoir is full to the maximum-fill level. If necessary, add Delco Supreme 11®, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container. If removal of the reservoir cap and diaphragm is necessary, clean the outside of the reservoir on and around the cap prior to removal.
With the rear brake pipe installed securely to the master cylinder, loosen and separate the front brake pipe from the front port of the brake master cylinder.
Allow a small amount of brake fluid to gravity bleed from the open port of the master cylinder.
Reconnect the brake pipe to the master cylinder port and tighten securely.
Have an assistant slowly depress the brake pedal fully and maintain steady pressure on the pedal.
Loosen the same brake pipe to purge air from the open port of the master cylinder.
Tighten the brake pipe, then have the assistant slowly release the brake pedal.
Wait 15 seconds, then repeat steps 3.3-3.7 until all air is purged from the same port of the master cylinder.
With the front brake pipe installed securely to the master cylinder, after all air has been purged from the front port of the master cylinder, loosen and separate the rear brake pipe from the master cylinder, then repeat steps 3.3-3.8.
After completing the final master cylinder port bleeding procedure, ensure that both of the brake pipe-to-master cylinder fittings are properly tightened.
Fill the brake master cylinder reservoir with Delco Supreme 11®, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container. Ensure that the brake master cylinder reservoir remains at least half-full during this bleeding procedure. Add fluid as needed to maintain the proper level. Clean the outside of the reservoir on and around the reservoir cap prior to removing the cap and diaphragm.
Install a proper box-end wrench onto the RIGHT REAR wheel hydraulic circuit bleeder valve.
Install a transparent hose over the end of the bleeder valve.
Submerge the open end of the transparent hose into a transparent container partially filled with Delco Supreme 11®, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container.
Have an assistant slowly depress the brake pedal fully and maintain steady pressure on the pedal.
Loosen the bleeder valve to purge air from the wheel hydraulic circuit.
Tighten the bleeder valve, then have the assistant slowly release the brake pedal.
Wait 15 seconds, then repeat steps 8-10 until all air is purged from the same wheel hydraulic circuit.
With the right rear wheel hydraulic circuit bleeder valve tightened securely, after all air has been purged from the right rear hydraulic circuit, install a proper box-end wrench onto the LEFT FRONT wheel hydraulic circuit bleeder valve.
Install a transparent hose over the end of the bleeder valve, then repeat steps 7-11.
With the left front wheel hydraulic circuit bleeder valve tightened securely, after all air has been purged from the left front hydraulic circuit, install a proper box-end wrench onto the LEFT REAR wheel hydraulic circuit bleeder valve.
Install a transparent hose over the end of the bleeder valve, then repeat steps 7-11.
With the left rear wheel hydraulic circuit bleeder valve tightened securely, after all air has been purged from the left rear hydraulic circuit, install a proper box-end wrench onto the RIGHT FRONT wheel hydraulic circuit bleeder valve.
Install a transparent hose over the end of the bleeder valve, then repeat steps 7-11.
After completing the final wheel hydraulic circuit bleeding procedure, ensure that each of the 4 wheel hydraulic circuit bleeder valves are properly tightened.
Fill the brake master cylinder reservoir to the maximum-fill level with Delco Supreme 11®, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container.
Slowly depress and release the brake pedal. Observe the feel of the brake pedal.

Important
If it is determined that air was induced into the system upstream of the ABS modulator prior to servicing, the ABS Automated Bleed Procedure must be performed.


If the brake pedal feels spongy, repeat the bleeding procedure again. If the brake pedal still feels spongy after repeating the bleeding procedure, perform the following steps:
Inspect the brake system for external leaks. Refer to Brake System External Leak Inspection .
Pressure bleed the hydraulic brake system in order to purge any air that may still be trapped in the system.
Turn the ignition key ON, with the engine OFF. Check to see if the brake system warning lamp remains illuminated.

Important
DO NOT allow the vehicle to be driven until it is diagnosed and repaired.


If the brake system warning lamp remains illuminated, refer to Symptoms - Hydraulic Brakes .

 

Thanks for all of the replies.

Turns out the switch inside the brake fluid reservoir is stuck in the open position, and the only way to fix it is to replace the reservoir.

Thank goodness for GMPP warranty!

 

You don't have to replace the switch! It's supposed to be OPEN when properly filled. You can clear the code with a scan tool, or 100 drive cycles. A drive cycle is not the same as an Ignition cycle. Read this:
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DTC C1247
Circuit Description
The brake fluid level switch monitors the level of brake fluid in the master cylinder. When the IPC sees the brake fluid level switch input grounded, it turns ON the red Brake indicator and sends a serial data message to the EBCM that tells the EBCM that the brake fluid level is low.

Conditions for Running the DTC
The ignition is ON.

Conditions for Setting the DTC
The EBCM receives a serial data message from the IPC indicating that the brake fluid level is low.

Action Taken When the DTC Sets
The EBCM disables the TCS/VSES until the DTC becomes a history DTC.
The red Brake warning indicator turns ON.
The Traction Control and Active Handling indicator turns ON.
The DIC displays the following messages:
Low Brake Fluid
Service Traction System
Service Active Handling
The ABS remains functional.
Conditions for Clearing the DTC
The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Diagnostic Aids
Inspect the master cylinder reservoir for the proper brake fluid level.

 

The dealership said the switch wasn't working right, and it would not clear with the scan tool.

I am not sure if it is "open" or "closed". All I know is that it isn't where it should be for normal operation.

 

Well, you can unplug it and the computer will think it's full!!!!!!
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Quote: All I know is that it isn't where it should be for normal operation.
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That sounds like a good discription for most Dealerships.

 

What is this procedure?

Also, would the traction control work if there were air in the system and the computer was displaying ABS & traction control codes?

 

ABS Automated Bleed Procedure
Bleeding the ABS System
Perform a manual or pressure bleeding procedure. Refer to Hydraulic Brake System Bleeding in Hydraulic Brakes. If the desired brake pedal height results are not achieved, perform the automated bleed procedure below.

The procedure cycles the system valves and runs the pump in order to purge the air from the secondary circuits normally closed off during normal base brake operation and bleeding. The automated bleed procedure is recommended when air ingestion is suspected in the secondary circuits, or when the BPMV has been replaced.

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.


Raise the vehicle on a suitable support. Refer to Lifting and Jacking the Vehicle in General Information.
Remove all four tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
Inspect the brake system for leaks and visual damage. Refer to Brake Fluid Loss or Symptoms - Hydraulic Brakes in Hydraulic Brakes. Repair or replace as needed.
Inspect the battery state of charge. Refer to Battery Inspection/Test in Engine Electrical.
Install a scan tool.
Turn ON the ignition, with the engine OFF.
With the scan tool, establish communications with the EBCM. Select Special Functions. Select Automated Bleed from the Special Functions menu.
Bleed the base brake system. Refer to Hydraulic Brake System Bleeding in Hydraulic Brakes.
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:
If a DTC is detected, refer to Diagnostic Trouble Code (DTC) List and diagnose the appropriate DTC.
If the brake pedal feels spongy, perform the conventional brake bleed procedure again. Refer to Hydraulic Brake System Bleeding in Hydraulic Brakes.
When the desired pedal height is achieved, press the brake pedal in order to inspect for firmness.
Remove the scan tool.
Install the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
Inspect the brake fluid level. Refer to Master Cylinder Reservoir Filling in Hydraulic Brakes.
Road test the vehicle while inspecting that the pedal remains high and firm.