Hello. I have a 2006 chevy impala ltz with 4wheel abs. I ...

Hello. I have a 2006 chevy impala ltz with 4wheel abs. I just replaced the abs control module cause the old one has failed and I bleed the [brakes](/topics-brakes/) and did an abs bleed and my brake pedal still goes to the floor b...

Hello. I have a 2006 chevy impala ltz with 4wheel abs. I just replaced the abs control module cause the old one has failed and I bleed the [brakes](/topics-brakes/) and did an abs bleed and my brake pedal still goes to the floor before the car will stop. I also replaced the master cylinder. What could cause this issue Mechanic's Assistant: Have you tried cleaning and oiling the brake pedal's pivot under the dash? The brake pedal is pushing and returning it's just going straight to the floor before I get any brake pressure Mechanic's Assistant: Are you fixing your Impala yourself? What have you tried so far? Yes I am. I have done pads rotors master cylinder abs control module and bleed the brake and abs system multiple times Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you? Nope that is all

Automotive Expert
Thank You for contacting JustAnswer! Hello I'm John. I am an ASE certified Master Technician with over 20 years experience in the Automotive Industry. I know it can be frustrating having vehicle problems. I'll do my best to help you. Please understand that I don't know what your skill level is, what tools you have available and I can not physically see what you are doing. If it is more helpful the site automatically offers a premium phone call service where you can talk to me directly or another Expert may call you if you request it. Please understand that this not a direct request from me as it is automated. You may accept or decline, but please understand that I may not be able to call right away as I may be helping another customer or researching information related to the problem you are having. Now let's get started!

Awesome thank you
Automotive Expert
did you bleed it with the scan tool?

I did
Automotive Expert
if you line lock the hoses do you get a peddle? did you attempt a gravity bleed at all 4 corners?

I did not gravity bleed it I did the traditional bleed someone holding the brake while I open the bleeder screw
Automotive Expert
its either air bound or has a leak or the new master is failed i would attempt a gravity bleed all 4 corners till u get a fast solid drip

Ok. May I ask what is line locking the hoses
Automotive Expert
locking pliers that crimpo off each hose https://www.autozone.com/wrenches-pliers-and-cutters/hose-clamp-pliers/oemtools-hose-pinching-pliers-set-3-piece/13529\_0\_0?spps.s=4770&cmpid=LIA:US:EN:AD:NL(###) ###-####GEN:\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*&gclid=EAIaIQobChMIh-S9xPKY7QIVGUWGCh35GAn6EAQYBSABEgJnp\_D\_BwE&gclsrc=aw.ds

The part I'm confused with is when the car isnt running I have full brake pressure and then when i start it it loses pressure and goes to the floor
Automotive Expert
have you driven it around the block GM brake pedals feel like garbage sitting still or on a lift

I did. Sadly nothing happened. Does the ecm have to be reprogrammed for a new abs module?
Automotive Expert
the ebcm gets programmed yes

Is that something that has to be done after installing the abs module
Automotive Expert
correct they do get flashed to the car

Could that be the cause of my issue cause I have not gotten it flashed to the vehicle
Automotive Expert
yup see attached pdf get it flashed and respond back i have a car in my bay time to get to work

Ok thanks
Automotive Expert
You're welcome

What others are asking

Car doesn't move when in gear. All gears seem like neutral except park.
It sounds to me like the place that did your last service made a mistake. The service you got and the symptoms you are having should not be related. Something must have been tampered with during the service causing the...
Tires making whining noise.
The tread wall of the tires need to be checked for abnormal wear. Inspect the tires to ensure no steel chords are exposed on the tire. Run your hand across the inner and outer edges of each tire to see...
Advice on using Lucas products
Hello there, thanks for writing in about your 1993 Chrysler LeBaron V6-3.0L. You are correct that fuel can gum up and the oil can form a varnish which coats parts of the engine over time. The best method for cleaning...
Water pump
Hi there, thanks for writing in. Usually a stock water pump on a Toyota RAV4 should last much longer than 35,000 miles. However, there are times when the water pump can fail prematurely (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-water-pump) for multiple reasons. Since you have...
Idle air valve calibration/adjustment
Hi there. It is suggested to have a bidirectional scan tool but it is not required. Verify the idle speed is within 650-750 rpm. You want to be at 700 rpm ideally. Connect data link connector terminals TEN & GND...
How much should it cost to repair an airbag controller?
Hello - yes, by all means this should be repaired! Without it, your airbag is just dead weight in the vehicle, and offers no protection in the event of a crash. Was the vehicle in an accident which damaged the...
Car does not always start.
This may suggest a weak battery or potentially a faulty starter solenoid. Although, a faulty starter solenoid is possible, the fact that you are able to get it started without any trouble by jumping suggests that the starter solenoid may...
What would cause the car to want to start on its own with no key in the ignition?
The wires for the battery terminal on the ignition switch is swapped with the starting terminal on the ignition switch and is causing your starter to engage. This would not be caused by the original wiring only if it was...
2008 Land Rover LR2 se. Over heating after cooling fluid was up in the day before. The car took almost 2galons when heated.
Hi There, It sounds like you may have a coolant leak of some kind such as a failing water pump that may be leaking or potentially the beginning of a blown head gasket that may be causing the coolant to...