GM

GM Repair Problems? Ask GM Repair Expert Now.

Ask an Expert,
Get an Answer ASAP!

GM

I need help diagnosing and fixing my 2003 Hummer H2 heated

Customer Question
seats JA: Have you checked the...
I need help diagnosing and fixing my 2003 Hummer H2 heated seats
JA: Have you checked the coolant level? Has there been any leaking from the hoses?
Customer: They are electrically heated seats
JA: Are you fixing your H2 yourself? What have you tried so far?
Customer: only fuses. seats started working only sometimes then not at all. Both seats do this at the same time. I think electrical issue
JA: Anything else you want the mechanic to know before I connect you?
Customer: Just help with the seats.
Submitted: 1 year ago.Category: GM
Show More
Show Less
Ask Your Own GM Question
Answered in 27 minutes by:
10/24/2016
GM Mechanic: Jared D, ASE Certified Technician replied 1 year ago
Jared D
Jared D, ASE Certified Technician
Category: GM
Satisfied Customers: 1,975
Experience: Shop Supervisor at County Fleet
Verified

Hi,

Can you run the following tests? You will need a multimeter.

Check for the relay in the Memory Seat Module (MSM) to click when the heated seat button is pressed.

If it does, disconnect the MSM.

Test the resistance of the seat heater elements from the MSM connector. They should all be 1.5-5.5 ohms.

If ok, have an assistant sit in the seat and retest.

Check each circuit for continuity to the seat frame. There should be no continuity- your meter should read ol when set to ohms.

Ask Your Own GM Question
Customer reply replied 1 year ago
I can test if you tell me where the module is located. I need help starting from scratch. Like I stated the seats used to work fine then went intermittent and now do not heat at all.
GM Mechanic: Jared D, ASE Certified Technician replied 1 year ago

Here is a diagram of the heated seat. The module is #3 and 4.

Ask Your Own GM Question
GM Mechanic: Jared D, ASE Certified Technician replied 1 year ago

Here are the two connector maps you will need for #3 and 4.

Ask Your Own GM Question
GM Mechanic: Jared D, ASE Certified Technician replied 1 year ago

You will check from pin 1 of connector 3 to pin 2 of connector 4 for resitance between 1.5-5.5 ohms. Then also from pin 11 to 13 of pin 4 for resistance.

Ask Your Own GM Question
GM Mechanic: Jared D, ASE Certified Technician replied 1 year ago

I'm sorry C3 pin 1 to C4 pin 14 (not pin 2).

And C4 pin 2 to C4 pin 11. I was looking at the diagram wrong.

Ask Your Own GM Question
GM Mechanic: Jared D, ASE Certified Technician replied 1 year ago

Next C3 14 to C4 12 for resistance. It should be 1.5-5.5 ohms.

And C4 22 to C4 1- also 1.5-5.5 ohms. These two are the seat back heaters.

Ask Your Own GM Question
GM Mechanic: Jared D, ASE Certified Technician replied 1 year ago

I just wanted to check whether you still need help with this.

Please don't forget to rate.

Ask Your Own GM Question
GM Mechanic: Jared D, ASE Certified Technician replied 1 year ago

Please don't forget to rate.

Ask Your Own GM Question
Ask Jared D Your Own Question
Jared D
Jared D
Jared D, ASE Certified Technician
Category: GM
Satisfied Customers: 1,975
1,975 Satisfied Customers
Experience: Shop Supervisor at County Fleet

Jared D 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)

GMC Mechanic

5,792 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

GMC Technician

1,523 satisfied customers

15 years gm master tech/15 years ASE master tech

car tech

car tech

ASE Certified Technician

449 satisfied customers

25 year master tech and shop owner

Chris (aka- Moose)

Chris (aka- Moose)

GMC Technician

203 satisfied customers

16 years of experience

Paul M ASE Master

Paul M ASE Master

ASE Master Tech

187 satisfied customers

ASE Master Tech 20+ Years

Anthony

Anthony

GMC Technician

489 satisfied customers

GM Certified

Amedee

Amedee

GMC Technician

451 satisfied customers

ASE certified tech with advanced level specialist. Wisconsin certified emissions state inspector

< Previous | Next >

Related GM Questions
I have a 2007 Chevy Tahoe. I set the parking brake and I
I have a 2007 Chevy Tahoe. I set the parking brake and I can't get it to release back up. The Tahoe won't move.… read more
Chris (aka- Moose)
Chris (aka- Moose)
GMC Technician
Vocational, Technical or Trade School
203 satisfied customers
Having trouble with chevy cobalt 2006, coolant temp on gage
having trouble with chevy cobalt 2006, coolant temp on gage in car reads 252F when I disconnect the coolant sensor the temperature drops to 232F, checked sensor with meter and tests ok, cooling fan ru… read more
Jaybird61
Jaybird61
Master Automotive Mechanic
1,879 satisfied customers
04 Yukon AC is cooling and suddenly starts blowing hot air,
04 Yukon AC is cooling and suddenly starts blowing hot air, I shut off engine and AC works OK.… read more
Aran
Aran
Technician
Associate Degree
392 satisfied customers
How do I find the engine size for my 2007 Hummer H3? I am
How do I find the engine size for my 2007 Hummer H3 ? … read more
Chris (aka- Moose)
Chris (aka- Moose)
GMC Technician
Vocational, Technical or Trade School
203 satisfied customers
I have a 2015 Cadillac Escalade and it just went over 50,000
Hello I have a 2015 Cadillac Escalade and it just went over 50,000 miles and I think I hear a squeaking noise in the rear shocks that's pretty faint when I go over large bumps slowly. Since the warran… read more
Jaybird61
Jaybird61
Master Automotive Mechanic
1,879 satisfied customers
Need some info for oil pan gasket for my chevy 99 express.
need some info for oil pan gasket for my chevy 99 express … read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
What is the torque specs for the oil pan bolts? for the 4 in
What is the torque specs for the oil pan bolts? for the 4 in the corners and the rest small ones.… read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
I have an ‘09 Acadia. It just started a few days ago kind of
I have an ‘09 Acadia. It just started a few days ago kind of bucking at about 65-70 mph. It sat for about a week with no prior issues. When I started it back up, this began happening … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
Change oil After 3000 miles there is NO oil left. 2 times
Change oil After 3000 miles there is NO oil left. 2 times now. And no indication that oil is low other than the oil pressure dropping down to about 21- usually around 60 on cold start and 42 or so whe… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
I have a 10 year old work truck, 1999 gmc Sierra 4wd ext cab
I have a 10 year old work truck, 1999 gmc Sierra 4wd ext cab z71, it has 160k miles, The a/c has slowly been loosing it coolling, so I charged it up, and it would escape within days, so clearly there … read more
ASEMaster35yrs
ASEMaster35yrs
Vocational, Technical or Trade Scho
1,314 satisfied customers
05 Yukon XL Denali AWD 6.0L. Started with NOT being able to
Yes started with NOT being able to fill Gas into tank normally EXCEPT VERY SLOWLY, and TIGHTEN GAS CAP messages, then CK ENGINE light and DTC= P0455. Odometer = 150,000 , so removed Vapor Canister and carbon pellets were falling out, so I replaced Vapor Canister, and replaced Vent Cntl Solenoid and EVAP Cntl Solenoid (after blowing pellets out of the line between the two), then cleared DTC. atempting to fill tank resulted in same VERY SLOW FILL process (aprox. 1 gal/min max) ????? … read more
Michael Solis
Michael Solis
241 satisfied customers
1997 suburban, GMC, deisel. The engine is orriginal, I keep
The engine is orriginal, I keep it well serviced. The problem that I need help with is that the environment control for the heater baffles is not working. I am an electronics technician and need the schematic for this environment control module so that I can troubleshoot it. … read more
roy
roy
Associate Degree
3 satisfied customers
2007 Silverado 4.8 cu. I have a P2138 code do you have a
2007 Silverado 4.8 cu. I have a P2138 code do you have a wiring diagram to show APP sensorcircuits for potential shorts to ground or high voltage drop while manipulating the harness between the APP se… read more
tim37857
tim37857
Mechanic
High School or GED
71 satisfied customers
1996 Chevy pickup brake lamps not working. Replaced brake
1996 Chevy pickup brake lamps not working. Replaced brake light switch 10 years ago. It does let me put me in drive and reverse. What do you think?… read more
Jaybird61
Jaybird61
Master Automotive Mechanic
1,879 satisfied customers
Looking for some information on a EG - 1 fuse that continues
Looking for some information on a EG - 1 fuse that continues to blow in my 99 Chevy 3500 van … read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
I have a 2004 Chevy cavalier that I replaced with not one
I have a 2004 Chevy cavalier that I replaced with not one but two different remanufactured power steering pumps when I fill the pump up and start the car there is no circulation in the reservoir is sh… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Will I be charged to ask a question? Yukon xl 2012. Brought
Check engine light flashing, engine running rough; lights to service stablitrack and traction control came on. Now no problem; no error codes recorded. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
How do I adjust the volume of chimes and turn signal on a
How do I adjust the volume of chimes and turn signal on a GMC Acadia 2009. It is very loud.… read more
Eric
Eric
Retired
N/A
14,436 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