Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

08 chevy colbalt cant bleed rear brakes, 160th no, ls, in…

Customer Question
08 chevy colbalt cant...

08 chevy colbalt cant bleed rear brakes

Mechanic's Assistant: How many miles are on the car? Are these the orignial brakes?

160th no

Mechanic's Assistant: What is the model of your '08 Chevy?

Ls

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

In our shop portion valve ?

Submitted: 11 months ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 14 minutes by:
9/6/2017
Chevy Mechanic: Roy, import/domestic specialest replied 11 months ago
Roy
Roy, import/domestic specialest
Category: Chevy
Satisfied Customers: 7,930
Experience: ASE master tech for 40 years
Verified

hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.

Roy

Ask Your Own Chevy Question
Chevy Mechanic: Roy, import/domestic specialest replied 11 months ago

with or without abs???

why are you bleeding the brakes???

Ask Your Own Chevy Question
Customer reply replied 11 months ago
abs no fluid coming out rear brakes when bleeding frount ok
Chevy Mechanic: Roy, import/domestic specialest replied 11 months ago

did you do any repairs to the rear before this???

Ask Your Own Chevy Question
Customer reply replied 11 months ago
new brakes ft &rear portioning valve bad?
Customer reply replied 11 months ago
no
Chevy Mechanic: Roy, import/domestic specialest replied 11 months ago

no, since you have abs, it is inside the abs assembly. you need to have the abs bled to be sure there is no air in the system there. you need a scan tool to perform this procedure. below is the procedure and you have done the manual bleed already.

Antilock Brake System Automated Bleed Procedure

Antilock Brake System Automated Bleed Procedure
Caution: Refer to Brake Fluid Irritant Caution .

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice .

Important: Before performing the ABS Automated Bleed Procedure, first perform a manual or pressure bleed of the base brake system. Refer to Hydraulic Brake System Bleeding (Pressure) (See: Brake Bleeding > Procedures)Hydraulic Brake System Bleeding (Manual) (See: Brake Bleeding > Procedures) . The automated bleed procedure is recommended when one of the following conditions exist:

* Base brake system bleeding does not achieve the desired pedal height or feel

* Extreme loss of brake fluid has occurred

* Air ingestion is suspected in the secondary circuits of the brake modulator assembly

The ABS Automated Bleed Procedure uses a scan tool to cycle the system solenoid valves and run the pump in order to purge any air from the secondary circuits. These 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 in these circuits to flow out toward the brake corners.

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.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove all four tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation .
3. Inspect the brake system for leaks and visual damage. Refer to Symptoms - Hydraulic Brakes (See: Hydraulic System, Brakes > Symptom Related Diagnostic Procedures > Symptoms - Hydraulic Brakes) . Repair or replace components as needed.
4. Lower the vehicle.
5. Inspect the battery state of charge. Refer to Battery Inspection/Test .
6. Install a scan tool.
7. Turn the ignition ON, with the engine OFF.
8. With the scan tool, establish communications with the ABS system. Select Special Functions. Select Automated Bleed from the Special Functions menu.
9. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
10. Following the directions given on the scan tool, pressure bleed the base brake system. Refer to Hydraulic Brake System Bleeding (Pressure) (See: Brake Bleeding > Procedures)Hydraulic Brake System Bleeding (Manual) (See: Brake Bleeding > Procedures) .
11. Follow the scan tool directions until the desired brake pedal height is achieved.
12. 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 - Vehicle , and diagnose the appropriate DTC.
* If the brake pedal feels spongy, perform the conventional brake bleed procedure again. Refer to Hydraulic Brake System Bleeding (Pressure) (See: Brake Bleeding > Procedures)Hydraulic Brake System Bleeding (Manual) (See: Brake Bleeding > Procedures) .

13. When the desired pedal height is achieved, press the brake pedal to inspect for firmness.
14. Lower the vehicle.
15. Remove the scan tool.
16. Install the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation .
17. Inspect the brake fluid level. Refer to Master Cylinder Reservoir Filling (See: Brake Master Cylinder > Procedures > Master Cylinder Reservoir Filling) .
18. Road test the vehicle while inspecting that the pedal remains high and firm.

Ask Your Own Chevy Question
Chevy Mechanic: Roy, import/domestic specialest replied 11 months ago

any update??

Ask Your Own Chevy Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a chevy mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Roy Your Own Question
Roy
Roy
Roy, import/domestic specialest
Category: Chevy
Satisfied Customers: 7,930
7,930 Satisfied Customers
Experience: ASE master tech for 40 years

Roy is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,756 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,642 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,884 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,953 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,836 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
I am getting three alarm codes on my 2008 chevy 2.2L colbalt
Second opinion] i am getting three alarm codes on my 2008 chevy 2.2L colbalt LS. whitch inclued: P0068, P0101, and P0016. I replaced the crankshaft position sensor and i am still getting these codes. … read more
Gary
Gary
Senior Technician
Vocational, Technical or Trade School
102 satisfied customers
I am getting three alarm codes on my 2008 chevy 2.2L colbalt
i am getting three alarm codes on my 2008 chevy 2.2L colbalt LS. whitch inclued: P0068, P0101, and P0016. I replaced the crankshaft position sensor and i am still getting these codes. Any ideals? … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
The brakes hold constant pressure and sluggish while
The brakes hold constant pressure and sluggish while driving. after I part the front brakes begin smoking … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
I replaced the master cylinder and brake booster on a 2012
I replaced the master cylinder and brake booster on a 2012 chevy impala with abs brakes now I cant get a brake pedal manuly bled brake system also performed auto bleed with scanner no signs of air com… read more
XtraTech
XtraTech
Sr. Technician
Bachelor's Degree
149 satisfied customers
1995 Astro van dash brake light is on. unplug sensor next to
1995 Astro van dash brake light is on. unplug sensor next to master cylinder and light go out.… read more
Joecamel90
Joecamel90
Technician
Associate Degree
24 satisfied customers
2000 chevy 3500 van master went bad, changed now i have no
2000 chevy 3500 van master went bad , changed now i have no fluid coming to the rear brakes… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet colbalt: i have a 08 chevy colbalt w/ 2.2L had the
i have a 08 chevy colbalt w/ 2.2L had the head off for intake valve burn replace valve and now i am trying to put it back together with new timing chain kit i put it all back with the new chain and sp… read more
Tim&#039;s Auto Repair
Tim's Auto Repair
mechanic
High School or GED
8,884 satisfied customers
GM Trailblazer: Own a 2006 Chevy Trailblazer LS 4x4 4.2L LS,
Own a 2006 Chevy Trailblazer LS 4x4 4.2L LS, having braking issues. Last July, lost pressure in the brake pedal so I switched out the master cylinder with an AutoZone Master Cyl (which I regretted lat… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet colbalt: my sons 2007 chevy colbalt ls wont start...
my sons 2007 chevy colbalt ls won't start... lights work radio and all not turning over at all... engine light is on and anti theft light… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
05 Trailblazer LS: the brake fluid bleed nut..assembly
What is the proper socket size for the brake fluid bleed nut on a '05 Trailblazer LS rear disk brake assembly?… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
2006 cobalt ls: brake lights..the trunk..turn signals..bulbs
My 2006 Colbalt LS has no brake lights except for the one on the trunk and no rear turn signals. I have had it looked at 3 times and no one can find the problem. Have checked the fuses, tested the wir… read more
John
John
Master A.S.E Automotive technician
2 YEARS COLLEGE
4,071 satisfied customers
1999 Chevy Monte Carlo: rear brake..rotors..pads..The brake pedal
I have a 1999 Chevy Monte Carlo LS. I just had both rear brake cyls and shoes (drums cut)and full front (rotors and pads) replaced. The brake pedal feels soft and the vehicle glides to a stop..I can t… read more
Jettadan1
Jettadan1
Lead mech
Some college
1,421 satisfied customers
1999 chevy: k2500..a little deeper about brakes..pedal
1999 chevy pickup k2500. Need to go a little deeper about brakes. I have a hard pedal with truck off. Pedal holds fine. brakes in back are redone adjusted and bleed and not air in back. I never bleed … read more
Hal
Hal
owner/service tech
Vocational, Technical or Trade Scho
848 satisfied customers
chevy cobalt: just cant figure out where to check transmission oil
hi i have a chevy colbalt 2006 and i just cant figure out where to check transmission oil??… read more
zzdaryl
zzdaryl
Lead Auto Tech
Some college and advanced training
4 satisfied customers
IM WORKING ON A 1995 S-10 4X4 PICK-UP ANTI..REAR BRAKES..BLEW..HOOD
I'M WORKING ON A 1995 S-10 4X4 PICK-UP ANTI-LOCK SYSTEM I USED A VACUME PUMP TO BLEED REAR BRAKES I GOT ALL THE OLD FLUID OUT NOW I CANT BLEED THEM NOTHING COMES OUT. SO I BLEW AIR FROM THE WHEEL CYLT… read more
Mr_Wrench
Mr_Wrench
GM auto Tech.
Vocational, Technical or Trade Scho
361 satisfied customers
My rear brake line busted so i replaced it and now i cant..bleed
my rear brake line busted so i replaced it and now i cant bleed the rear brakes i was told the proportioning valve is the reason.… read more
Bob
Bob
Vocational, Technical or Trade Scho
2,784 satisfied customers
98 Chevy truck: trailing..referenced the haynes manuel to no prevail.
I have replaced the shoes on my 98 Chevy truck. They are the leading/trailing drum type. I have referenced the Haynes manuel to no prevail. Well the problem I am having is the pedal is still to easy. … read more
johnny
johnny
High School or GED
71 chevy: bleed..chevy has a new master cy,calipers & wheel cylinders
i have a 71 chevy 350 2 x 4 & cant get my ft.calipers to bleed.my chevy has a new master cy,calipers & wheel cylinders. the rear brakes bleed when someone pumps & holds but not the front juast a small… read more
Bob
Bob
Vocational, Technical or Trade Scho
2,784 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x