GMC

GMC Troubleshooting Questions? Ask a Mechanic for Answers

Ask an Expert,
Get an Answer ASAP!

GMC

CAM ONLY I have a 2005 GMC Sierra 2500hd Duramax with an

Customer Question
FOR GMTECH CAM ONLY I have...
FOR GMTECH CAM ONLY
I have a 2005 GMC Sierra 2500hd Duramax with an intermittent ABS light. The ABS light started at the the same time I discovered a leak in the hydroboost line (supply I think, engine side or inside line) from the power steering pump to the hydroboost unit.
The hydroboost line was replaced, power steering was flushed and bleed. The intermittent ABS light is still an issue. Generally at low speed turns to the left most of the time, infrequently at low speed turns to the right and driving straight. The situation will generally improve after the vehicle is driven. There are no power steering or brake fluid leaks, with brake pressure applied on engine start the pedal drops and returns, steering is normal and braking in normal except infrequently you can feel the pedal drop and pulsate like the ABS is doing its deal for no reason and if you brake hard enough to engage the abs the vehicle pulls to the right. Thanks
Submitted: 2 years ago.Category: GMC
Show More
Show Less
Ask Your Own GMC Question
Answered in 7 hours by:
11/5/2015
GMC Mechanic: Gm Tech (Cam), GMC Mechanic replied 2 years ago
Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 29,591
Experience: GM Grand Master Technician 2007. 14 year experience.
Verified

Hi there, Thanks for requesting me. With your truck, I hear the abs is on but at times its off and the Abs activates?

If so, have you had a chance to get the codes?

Ask Your Own GMC Question
GMC Mechanic: Gm Tech (Cam), GMC Mechanic replied 2 years ago

Also have you had a chance to check for a loose front wheel bearing?

Ask Your Own GMC Question
Customer reply replied 2 years ago
The abs lights illuminates with audio tone intermittently and has progressively gotten worse. The brakes seem to work properly to include abs functionality except occasionally the abs activated during normal braking and the vehicle will pull to the right. I have not checked codes, recently moved and diagnostic code reader is packed. Upper ball joints need to be replaced. Forgot to mention that I thoroughly cleaned the abs ground under the drivers side door and cleaned every abs quick disconnect with electrical contact cleaner. I have not cleaned and reseated the abs sensors. The abs light illuminates with almost every left hand turn, usually at lower speed with greater steering wheel movement. Right hand turns are 50% or less regular ding abs illumination. Unless coincidental, this all started at the same time my hydroboost lines failed which has been replaced as mentioned above.
GMC Mechanic: Gm Tech (Cam), GMC Mechanic replied 2 years ago

Ok, everything your mentioning is screaming either a wiring issue to the front wheel speed sensor, a bad wheel speed sensor or a wheel bearing in the front.

Ask Your Own GMC Question
GMC Mechanic: Gm Tech (Cam), GMC Mechanic replied 2 years ago

What I would do is take the connector off the top of the upper control arm, measure resistance over the 2 pins in the connector and see if changes when you move the wiring. IF so, change that sensor and if the bearing is loose, change the bearing.

Ask Your Own GMC Question
Customer reply replied 2 years ago
Forgot to mention when bleeding the power steering, the abs light illuminate every time turning the wheel to the left just before reaching the turn stop with the tires off the groun and only intermittently when turning to the right. While driving the abs light is consistent with larger steering wheel movement generally at lower speed. Don't believe speed is the issue, seems more like steering wheel movement but not sure.
GMC Mechanic: Gm Tech (Cam), GMC Mechanic replied 2 years ago

That screams wiring to the sensor. IT is not related to the power steering. Check the wiring to the sensor as I mentioned and I think you will find it.

Ask Your Own GMC Question
Customer reply replied 2 years ago
Check the resistance of the two pins going to the sensor on the wheel or to the wiring harness into the truck
GMC Mechanic: Gm Tech (Cam), GMC Mechanic replied 2 years ago

bearing assembly.

Ask Your Own GMC Question
Customer reply replied 2 years ago
Ok thanks. Will check it out. Think I got it. Disconnect the abs sensor at the frame and check resistance of the wires that runs down the upper control arm to the back of the hub.
GMC Mechanic: Gm Tech (Cam), GMC Mechanic replied 2 years ago

Exactly.

Ask Your Own GMC Question
Customer reply replied 2 years ago
Thanks. Will check it out tomorrow.
GMC Mechanic: Gm Tech (Cam), GMC Mechanic replied 2 years ago

Please bookmark this page so you can easily navigate back to it so we can continue the discussion. This is done by pressing (CTRL D on PC and CMD D on Mac). You can reply at any time for follow up information regarding this issue, even after you rate the site and I will reply.

Ask Your Own GMC Question
Ask Gm Tech (Cam) Your Own Question
Gm Tech (Cam)
Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 29,591
29,591 Satisfied Customers
Experience: GM Grand Master Technician 2007. 14 year experience.

Gm Tech (Cam) 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:

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

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

29,591 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,542 satisfied customers

GCM master tech over 25 years

Dave Nova

Dave Nova

GMC Technician

929 satisfied customers

ASE Master Certification. GM World Class Certification

Chris (aka-Moose)

Chris (aka-Moose)

GMC Technician

563 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

255 satisfied customers

18+yrs experience. State Inspector & GMC Diagnostics/Repair

George H.

George H.

ASE MasterTechnician

225 satisfied customers

15+ Years ASE Master Technician with Level 1 Certification

Don - Mo Lurch

Don - Mo Lurch

ASE Certified Technician

216 satisfied customers

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

< Previous | Next >

Related GMC Questions
2008 3500 duramax new power steering pump makes a vibrating
2008 3500 duramax new power steering pump makes a vibrating noise some times not breaking just driving along … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
Change right front abs sensor still got co040 code. Are you
change right front abs sensor still got co040 code … read more
Gunvir Singh
Gunvir Singh
1,712 satisfied customers
My 2001 gmc sierras power steering went out help. Whining
My 2001 gmc sierras power steering went out help JA: When was the fluid last checked? Have you heard any whining noises while turning the wheel? Customer: Yes whining while in a drive thru JA: Are you… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,542 satisfied customers
I got a 2003 Kodiak 4500 and the abs light is on and the ip
I got a 2003 Kodiak 4500 and the abs light is on and the ip brake light is on. I hook up my scan tool but I cant communicate with abs.… read more
roy
roy
Associate Degree
3 satisfied customers
Brake pedal has gone way down and Service Brake Service is
Brake pedal has gone way down and Service Brake Service is on the dash board … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
Got a 2002 envoy changed rack and power steering hoses want
got a 2002 envoy changed rack and power steering hoses want start but it will turn over..changed fuel pump … read more
Mechanic01
Mechanic01
1,171 satisfied customers
03 GMC Sierra when brakes are applied under normal operating
03 GMC Sierra when brakes are applied under normal operating conditions the ABS sometimes activates. Is this normal or a problem....There are no brake codes… read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
I have a 2001 Yukon SLE with 5.3L. The ABS light used to
I have a 2001 Yukon SLE with 5.3L. The ABS light used to intermittently come on and it would throw a C0265 code. Meaning that ABS would work some times and not others. Different every time you started… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,542 satisfied customers
My ABS light & 4WD light comes on and fan motor shuts off
My ABS light & 4WD light comes on and fan motor shuts off intermittently. By tilting steering wheel it will correct problem. Any Ideas? … read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
563 satisfied customers
Stabilitrak service light and abs light both on, service
nothing so far- just started looking- it has only come on one time before and stopped- this time didn't want to go into gear but then did and is working fine- lights still on though … read more
Gunvir Singh
Gunvir Singh
1,712 satisfied customers
The ABS and Traction Control started coming on today they go
The ABS and Traction Control started coming on today they go off and on. I own a 2005 GMC Yukon. … read more
Gunvir Singh
Gunvir Singh
1,712 satisfied customers
The abs and ted brake light is on. Both. 2005 yukon. Ive
The abs and ted brake light is on JA: Is it just the ABS light? Or is the brake system warning light on, too? Customer: Both JA: What is the model/year of your GMC? Customer: 2005 yukon JA: Are you fi… read more
roy
roy
Associate Degree
3 satisfied customers
Stopped hard in the rain. The abs and brake light came one.
Stopped hard in the rain. The abs and brake light came one. And the tran was stuck in one gear. … read more
Todd M
Todd M
Owner
ASE Certification
1,303 satisfied customers
Power steering. 1/2 full and no but looks dark. 2008 k1500.
power steering JA: When was the fluid last checked? Have you heard any whining noises while turning the wheel? Customer: 1/2 full and no but looks dark JA: What is the model/year of your GMC? Customer… read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
2003 Yukon 4wd 5.3. Check engine light on. Abs light on.
2003 Yukon 4wd 5.3. Check engine light on. Abs light on. Service brake system message. Intermittent service 4wd message. Trans wont shift past 2nd… read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
290 satisfied customers
2006 GMC H2 6.0 Need labor time to change the power steering
2006 GMC H2 6.0Need labor time to change the power steering pump pulley and serpentine belt.… read more
Ron Z.
Ron Z.
- GMC Tech -
Vocational, Technical or Trade Scho
255 satisfied customers
Brake & abs lights coming on, just put new rotors & pads on
brake & abs lights coming on, just put new rotors & pads on rear , fronts are fine.. … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
This is i think the power steering pump in my sierra truck,
this is i think the power steering pump in my sierra truck, is leaking power steering fluid between the part black and silver. i do not know what to replace because the parts diagram does not show the… read more
mike switzer
mike switzer
686 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