GMC

GMC Troubleshooting Questions? Ask a Mechanic for Answers

Ask an Expert,
Get an Answer ASAP!

GMC
This answer was rated:

I need to change out the alternator on my truck. It's pretty

I need to change out...
I need to change out the alternator on my truck. It's pretty clear that the alternator is mounted on top, and in plain site. (See photo).
I assume that it just unbolts via the two large visable bolts from the bracket holding it in place. However, it would be nice to know which is the tensioning pulley, and how to properly utilize it to release the belt.
Show More
Show Less
Ask Your Own GMC Question
Answered in 2 minutes by:
8/21/2017
david craig
david craig, Owner/[email protected] 3D Atuomotive
Category: GMC
Satisfied Customers: 4,162
Experience: owner/mechanic at 3D Automotive
Verified

Hi Im David, thanks for visiting the site. what year model and engine size please?

Ask Your Own GMC Question
Customer reply replied 3 months ago
I forgot to mention that it's a 2008 GMC Sierra 1500, 4.8 liter (I think)
Customer reply replied 3 months ago
I just sent that.
2008 GMC Sierra 1500 4.8 liter

ok, thanks

Ask Your Own GMC Question
Customer reply replied 3 months ago
There are three pulleys in the photo. Obviously, the right most pulley is the alternator. I just wondered if the tensioning pulley is the center one, ir the one on the lower left.

here you go

Ask Your Own GMC Question

its the top left looking at the engine

Ask Your Own GMC Question
Customer reply replied 3 months ago
While looking at the photo I sent, does it look like the tensioning pulley is the one you can barely see in the left hand side of the photo, which was taken while facing the engine from the front of the truck.

yes. just put a socket and breaker bar on it and it should rotate

Ask Your Own GMC Question

here you go

https://www.youtube.com/watch?v=PCJZITWaKNU

Ask Your Own GMC Question
Customer reply replied 3 months ago
I think that's everything I need, and I'm ready to "rate" so you can get paid. Unfortunately, this JA web page isn't presenting me with the necessary link with which to do so. This has happened a number of times over the years. Maybe you can do something from your end...

please accept the answer and leave a 5 star rating for me if you are satisfied with my assistance

Ask Your Own GMC Question

thank you

david craig
david craig, Owner/[email protected] 3D Atuomotive
Category: GMC
Satisfied Customers: 4,162
Experience: owner/mechanic at 3D Automotive
Verified
david craig and 87 other GMC Specialists are ready to help you
Ask your own question now

thank you

Ask Your Own GMC Question
Ask david craig Your Own Question
david craig
david craig
david craig, Owner/[email protected] 3D Atuomotive
Category: GMC
Satisfied Customers: 4,162
4,162 Satisfied Customers
Experience: owner/mechanic at 3D Automotive

david craig 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

1,696 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,552 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

576 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

259 satisfied customers

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

George H.

George H.

ASE MasterTechnician

226 satisfied customers

15+ Years ASE Master Technician with Level 1 Certification

Don - Mo Lurch

Don - Mo Lurch

ASE Certified Technician

218 satisfied customers

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

< Previous | Next >

Related GMC Questions
Idle engine. 285000 VVM envoy 2003 XL. Also battery not
This just happened todayhvnt had a chance to do anything as yet… read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
576 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
1,278 satisfied customers
Jasper engine, no codes, loss of power...sounds like
jasper engine , no codes , loss of power...sounds like ignition timing...Hmmm … read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
576 satisfied customers
06 envoy cranks but no start engine light is on and stays on
06 envoy cranks but no start engine light is on and stays on solid no security lights and fuel pump is on when key is turned to start cranclk speed … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Truck will not remote start and check engine light on.
Truck will not remote start and check engine light on. Advance Diagoned: Getting code P0674 GP cyl 4 issue, U0101 TCCM no comm, and code C0550 … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
With the engine running an turn the headlight switch on the
with the engine running an turn the headlight switch on the engine goes into reduced power mode. If you pull the dimmer the engine dies. … read more
roy
roy
Associate Degree
3 satisfied customers
Creplacet the engine and the instrument cluster does not
creplacet the engine and the instrument cluster does not operate at all now … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
High pitched noise coming from engine compartment whether
second opinion] High pitched noise coming from engine compartment whether the ac is on or off doesn't affect it. When you turn the wheel there's a small whine and the car trembles a bit. But it does t… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,096 satisfied customers
Traction control light on reduced engine power, No i was
No i was just driving home and power reduced and engine and traction control light came on just happened ten minutes ago no stores open … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
Aveo 2009: replaced engine. Engine starts but shuts off with
Aveo 2009: replaced engine. Engine starts but shuts off with in 2 or 3 seconds. Any suggestions … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
The reduced engine power symbol is on but with no arrow.
The reduced engine power symbol is on but with no arrow. Have not experienced any change in engine performance since I noticed it today. What does this usually indicate? … read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
Battery goes dead overnight, BAttery is good. Alternator is
BAttery is good. Alternator is good. I have pulled every fuse and can't find a circuit that is causing the draw. … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,552 satisfied customers
2007 Acadia had alternator replaced. Now it starts stays on
2007 Acadia had alternator replaced. Now it starts stays on for a few minutes then shuts off. Need to get boosted every time … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,552 satisfied customers
Had to change the alternator due to overcharging. it also
had to change the alternator due to overcharging. it also burned up the battery. after replacing both the battery and alternator. once i connected the battery hot wire the car started without the key … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Installed a new alternator and I did not unhook the battery.
Installed a new alternator and I did not unhook the battery. The starter wire touched something and sparked. Now my truck will not start, the lights will not come on interior or exterior, the auto loc… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
I have a 2009 gmc acadia the alternator was amking noise and
i have a 2009 gmc acadia the alternator was amking noise and the truck had several codes in it i replaced he alt and noise is gone but its charging 15.7 no codes are coming back but i can pull codes o… read more
david craig
david craig
Owner/[email protected] 3D Atuomotive
4,162 satisfied customers
GMC 2007 Roadtrek 6.0L 145 amp alternator. Battery warning
GMC 2007 Roadtrek 6.0L 145 amp alternator. Battery warning light on, volt output 11.7 volts; intermittent problem; equipped with dual battery isolator, sometimes it self corrects and voltage goes to 1… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
No crank no start everything comes on battery alternator
No crank no start everything comes on battery alternator starter is fine acts like it's the anti theft … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,096 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