GMC

GMC troubleshooting questions? Ask a mechanic for answers

Ask an Expert,
Get an Answer ASAP!

I have a 2008 gmc sierra 2500hd 6.6 4×4 and it will not

Customer Question
crank brand new batteries turn...
I have a 2008 gmc sierra 2500hd 6.6 4×4 and it will not crank brand new batteries turn the key on lights on the dash come on but as soon as u turn to start it won't do any thing any suggestions?
Submitted: 9 months ago.Category: GMC
Show More
Show Less
Ask Your Own GMC Question
Answered in 11 minutes by:
9/10/2017
GMC Mechanic: Joshua Haynes,
 replied 9 months ago
Joshua Haynes
Category: GMC
Satisfied Customers: 276
Experience: Lead Technician/ Manager at Precision Tune Auto Care
Verified

Good evening! My name is ***** ***** I will assist you

Ask Your Own GMC Question
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

Is there any indication of a clicking or thud or any noise at all when you turn the key on?

Ask Your Own GMC Question
Customer reply replied 9 months ago
No thud just the sound of like a fan coming on and the dinging noise
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

As you hold it in the "start" position, do all of the lights on the dash go out and the dinging noise stop?

Ask Your Own GMC Question
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

Do you have any electrical equipment like a test light that you can use to test the starter with my help?

Ask Your Own GMC Question
Customer reply replied 9 months ago
I have a volt meter
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

Awesome, if you are able to get to the starter, there is a pretty simple test that you can run to see if it is getting its signal. Do you have a way to get to the starter and either an assistant to turn the key while you are down there or a long enough test lead to attach on the starter while you have the meter inside with you and you turn the key?

Ask Your Own GMC Question
Customer reply replied 9 months ago
No it's just me
Customer reply replied 9 months ago
don't have that long of leads
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

ok, that makes it a bit more difficult... there is a more "shade-tree" way to see if the starter is the problem. If you have a hammer, you can hit the case of the starter with medium force several times and try again...

Ask Your Own GMC Question
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

If it starts after this, then you have a bad starter whose internal magnets are sticking to the case. If it does not start you will need to try to get a helper to run through some tests to either prove that the starter is bad or to rule it out and move on to the rest of the testing that would be required to find the problem.

Ask Your Own GMC Question
Customer reply replied 9 months ago
Me and my dad checked the starter the other day and he said it wasn't getting any power when I turned the key but I'm not for sure if he checked the same thing u r talking about I'd say he did tho he has been a mechanic all his life we r just kinda blind with the newer electronic aide of vehicles
Customer reply replied 9 months ago
Side*
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

Ok, that is the test that I was referring to. If he checked and there was no signal to the starter on the small wire, then it is very likely that you have a security problem or possibly an ignition switch or fuse problem. Have you checked fuses yet?

Ask Your Own GMC Question
Customer reply replied 9 months ago
Tried to but didn't know which fuse to check
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

I will check to find out what fuses control that circuitry

Ask Your Own GMC Question
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

Ok, buddy, I have a few for you, are you ready to check some fuses and swap some relays?

Ask Your Own GMC Question
Customer reply replied 9 months ago
I'm ready lol it's dark here but il do my best
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

Let me know how it goes and if you have any questions! Please remember to leave me a positive rating!

Ask Your Own GMC Question
Customer reply replied 9 months ago
I believe that's the wrong circuitry because 60 dosnt even have a fuse in it and I did try switching relays didn't change any thing
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

You are looking in the underhood fuse box, right? And making sure I have the right vehicle: 2008 GMC Sierra HD 6.6L diesel

Ask Your Own GMC Question
Customer reply replied 9 months ago
that is correct I put a 40 amp fuse in that soot just to see and had no luck
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

Is there any way that you can send me your VIN number?

Ask Your Own GMC Question
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

Has your radio clock reset?

Ask Your Own GMC Question
Customer reply replied 9 months ago
Naw prolly not tonight idk where it would be at and I'm not for sure I came in the house where would the vin number be located?
Customer reply replied 9 months ago
My clock hasn't reset
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

The vin number is ***** two places that you should be able to see easily: 1) at the edge of the dash all the way at the windshield at the bottom on the driver's side corner and 2) on a sticker on the door jamb for the driver's door

Ask Your Own GMC Question
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

You should check the following when you are ready:

1) remove both battery terminals on both batteries and make sure that they are clean and tight

2) is the security light on?

--> an easy reset procedure for a security problem involves turning the key in the "on" position for 10 minutes straight and then trying to start the truck

3) There should be two large gauge wires going to your starter from the battery (I think the battery on the driver's side) and they both need to have power at the battery and the starter. There is a fusible link in the middle of one of the wires, and they are prone to burn out.

Ask Your Own GMC Question
Customer reply replied 9 months ago
Hey man I'm gonna try that stuph in the morning will that be okay?
Customer reply replied 9 months ago
1gthk23648f110955 I think that is the vin number
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

Let me know when you have done the other things I mentioned

Ask Your Own GMC Question
Customer reply replied 9 months ago
Every thing but the fuse I couldn't find it would it be closer to starter or battery?
Customer reply replied 9 months ago
I have done every thing I have power coming to the starter no power on the little wire
Customer reply replied 9 months ago
Could it be key switch?
GMC Mechanic: Joshua Haynes,
 replied 9 months ago

I am so sorry, I didn't see where you had responded...I think that my system must have frozen on your last reply asking to do it the next day.

Yes, it could be the key switch. If you are not getting any power to the signal wire on the starter, you should begin to trace it up from there. The next easiest place to check would be the starter relay. You want to see if when you turn the key to the "start" position, you are getting power. If not, you would then begin making your way up to the switch.

Ask Your Own GMC Question
Customer reply replied 9 months ago
Could u tell me to replace this switch...i have the bottom plastic piece off and the plastic piece around the steering column removed can't figure out how to get that little box out tho
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a gmc mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Joshua Haynes Your Own Question
Joshua Haynes
Joshua Haynes
Joshua Haynes
Category: GMC
Satisfied Customers: 276
276 Satisfied Customers
Experience: Lead Technician/ Manager at Precision Tune Auto Care

Joshua Haynes 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

1,794 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,588 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

626 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

279 satisfied customers

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

JFN1

JFN1

ASE Certified Technician

269 satisfied customers

GM Master Technician

George H.

George H.

ASE MasterTechnician

228 satisfied customers

15+ Years ASE Master Technician with Level 1 Certification

< Previous | Next >

Related GMC Questions
Gmc Acadia: I replaced the battery in a2010acadia now it wonT
I replaced the battery in a2010acadia now it won'T start. It clicks but starter won't turn over. A code po25a shows up on my scanner.… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,588 satisfied customers
GMC Yukon Denali: 07 Yukon auto liftgate problem
I have an 07 gmc denali with the auto liftgate. the remote release and the handle were pushed at the same time and since then the auto motor will not open the hatch. Is there a reset for the motor or … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,794 satisfied customers
2002 GMC Envoy: Key stuck in ignition
My key is stuck in the ignition on my GMC Envoy. How do I get it out? Make: GMC Model: Envoy Year: 2002… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I have a 92 sierra replaced alternator and battery it sat
i have a 92 sierra replaced alternator and battery it sat for a couple days dead battery..i took battery back charged it say thing happen … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,308 satisfied customers
Brake lights come on when parked killing the battery. I
Brake lights come on when parked killing the battery. I changed the switch above the brake pedal but it still is happening. You think it is the ignition switch? … read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
626 satisfied customers
No interior power, have power to fuse box and battery is
No interior power, have power to fuse box and battery is fully charged … read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
626 satisfied customers
DIC stopped working. 2004 yukon. Diconnect battery and
I have located bot fuse panels but only one had a DIC… read more
JFN1
JFN1
ASE Certified Technician
Vocational, Technical or Trade Scho
269 satisfied customers
Battery will not charge. new battery and new alternator. The
battery will not charge. new battery and new alternator … read more
Cesar Jimenez
Cesar Jimenez
Owner/CEO
Vocational, Technical or Trade School
171 satisfied customers
I have a brand new battery in but my battery level sits at
I have a brand new battery in but my battery level sits at about 11 on the cluster and won't turn on, if I boost it the truck starts and runs normal but if I turn the truck off the truck immediately w… read more
Mechanic01
Mechanic01
2,798 satisfied customers
New battery drains overnight. No but the battery is new. The
No but the battery is new. The same thing happened before the battery was replaced. … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Battery saver light came on. Battery test with the engine
Battery saver light came on. Battery test with the engine off at 12.7 VDC, With the engine running at an idle 15.7 VDC. Trying to locate the issue … read more
Mechanic01
Mechanic01
2,798 satisfied customers
Battery is dead all of a sudden. symble on dash = Battery
battery is dead all of a sudden. symble on dash = Battery malfunction It's a 2013 Acadia … read more
AZTechBrian
AZTechBrian
ASE Certified Technician & Shop Owner
Vocational, Technical or Trade School
732 satisfied customers
GM Yukon Denali: Vehicle is completely dead. I cant jump
Vehicle is completely dead. I can't jump or get any electrical item to work. Vehicle is a 2010 Yukon Denali.… read more
Canadafix
Canadafix
Auto shop owner
Vocational, Technical or Trade Scho
869 satisfied customers
GMC Sierra 1500: 05 sierra horn on stering wheel does not work
05 sierra horn on stering wheel does not work ,but works on entry lock… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,588 satisfied customers
Error Code B0100 Electronic Front End Sensor 1 Malfunction.
Error Code B0100 Electronic Front End Sensor 1 Malfunction. Is this a repair that I can do easily myself?… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
GMC Sierra 1500 Classic SLE: wiring diagram for a 2009 gmc
wiring diagram for a 2009 gmc sierra am/fm cd delco stereo.… read more
goodwrench9124
goodwrench9124
Lead Tech/ Shop Leader
Vocational, Technical or Trade Scho
2,571 satisfied customers
GMC Sierra 1500 Classic SLE: How do I replace the camshaft
How do I replace the camshaft position sensor on my 1997 gmc Sierra k1500?… read more
Ron Z.
Ron Z.
- GMC Tech -
Vocational, Technical or Trade Scho
279 satisfied customers
GMC Yukon Denali: My car used to turn-off the radio and other
My car used to turn-off the radio and other accessories when I opened the drivers door. Now it just stays on until the 10-minute auto shut-off kicks in. All the other doors/hatches work properly. It i… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,794 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