GM

GM repair problems? Ask a GM repair expert now.

Ask an Expert,
Get an Answer ASAP!

Computer says engine hot,, but the temp gauge says zero.

Customer Question
Computer says engine hot,...

Computer says engine hot,, but the temp gauge says zero

Mechanic's Assistant: Have you checked the coolant? Have you noticed any leaking?

Filled up the coolant,,was half a gallon low

Mechanic's Assistant: What is the model/year of your GM?

2012 sierra ,, pain jane model

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

Just the coolant,w,as thinking its a bad sensor

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Coolant fans stay on,, engine lite says engine hot a/c turned off

Submitted: 5 months ago.Category: GM
Show More
Show Less
Ask Your Own GM Question
Answered in 2 minutes by:
11/25/2017
GM Mechanic: Ron, ASE Certified Technician replied 5 months ago
Ron
Ron, ASE Certified Technician
Category: GM
Satisfied Customers: 37,812
Experience: 34 year as An ASE certified Tech
Verified

Hello. My name is ***** ***** I am happy to assist you today. Give me just a moment to review your post, and I'll be right back with the help you need.

Ask Your Own GM Question
GM Mechanic: Ron, ASE Certified Technician replied 5 months ago

Is the temp gauge actually reading cold?

What size engine is in your Sierra?

Ask Your Own GM Question
Customer reply replied 5 months ago
4.6 l v-6 1500
GM Mechanic: Ron, ASE Certified Technician replied 5 months ago

Is the temp gauge actually reading cold?

Ask Your Own GM Question
Customer reply replied 5 months ago
temp is reading cold,, dashboard display reads engine hot a/c turned off,, it wasnt on anyway
GM Mechanic: Ron, ASE Certified Technician replied 5 months ago

Okay, thank you for that, the common cause for this type of problem is in most cases caused by a sticking thermostat meaning its stuck open and that causes the gauge to read cold and also cause a false reading for the engine temp sensor. The fix in most cases is to remove and replace the engine thermostat and refill the system. I have enclosed the thermostat replacement steps in the link below as well. Have a look and post back if you have more questions and or need more help.

https://www.dropbox.com/s/6u6efhw1qmbtp5r/thermostat%20Nov%2025.pdf?dl=0

Ask Your Own GM Question
GM Mechanic: Ron, ASE Certified Technician replied 5 months ago

Just checking in to see if your still needing help with this , if so please post back and we can work from there if need be. If not then please take a moment to rate my service so I can get credit for my time, the question remains open for follow up even after doing so, all you need to do is return to this question if need be.

Thank you again.

Ask Your Own GM Question
Was this answer helpful?
Ask Ron Your Own Question
Ron
Ron
Ron, ASE Certified Technician
Category: GM
Satisfied Customers: 37,812
37,812 Satisfied Customers
Experience: 34 year as An ASE certified Tech

Ron 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

1,537 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

211 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

455 satisfied customers

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

< Previous | Next >

Related GM Questions
03 duramax surges bad at idle. olny turns 2000 luses prime
03 duramax surges bad at idle. olny turns 2000 luses prime out fuel return … read more
Chris (aka- Moose)
Chris (aka- Moose)
GMC Technician
Vocational, Technical or Trade School
211 satisfied customers
I have a service charge system light on after replacing the
I have a service charge system light on after replacing the alternator and battery … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,067 satisfied customers
2012 terrain I put a heater core in and now the info screen
2012 terrain I put a heater core in and now the info screen comes on but you can just bearly see it but the radio works. I changed screen that I saw work my self a still the same thing the radio has t… read more
GM Tech (Cam)
GM Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
5,792 satisfied customers
Driver front caliper has non stop air bubbles coming out, 2
Driver front caliper has non stop air bubbles coming out … read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
Hope you are well, I need your help again concerning the
Jerry, Hope you are well, I need your help again concerning the issue listed below. I did as you suggested, the shop that's working on my H3 purchased the "pig tail" from GM and installed it yesterday… read more
Mechanic01
Mechanic01
2,388 satisfied customers
Had transmission replaced. It has been replaced. 2004 gmc
Had transmission replaced JA: When was your transmission fluid last checked? Customer: It has been replaced JA: What is the make/model/year of your car? Customer: 2004 gmc envoy JA: Are you fixing you… read more
TIM MOHR
TIM MOHR
SHOP OWNER
Master's Degree
8,037 satisfied customers
My 2004 Chevy blazer ZR2 has a po300 multiple random misfire
My 2004 Chevy blazer ZR2 has a po300 multiple random misfire code and was wandering if it could be a vacuume leak … read more
Gary
Gary
GMC Technician
Vocational, Technical or Trade Scho
1,537 satisfied customers
Trying to program key fob, it cycles when I let off of the
Trying to program key fob, it cycles when I let off of the unlock button but when holding down lock an unlock on fob at same time it never cycles. Have tried multiple times. … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
358 satisfied customers
97gmc5.7, I don't have power to the fuse block. I have
97gmc5.7 , I don't have power to the fuse block . I have checked the relay and have power, I also have jumped pin 30 to pin 87 and the fuel pump will not run. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
The anti theft is on. Car clicks but will not start, Just
The anti theft is on. Car clicks but will not start … read more
rpmdiag
rpmdiag
High school
7,513 satisfied customers
After $1,200; 100,000 mile maintenance and new battery,
After $1,200; 100,000 mile maintenance and new battery, driver's side climate control blows hot air. … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
358 satisfied customers
I need a wiring diagram for the rear liftgate ajar switch
i need a wiring diagram for the rear liftgate ajar switch for 2008 yukon denali. trying to find out what color wires to check as my rear access display keeps coming on. not sure if it is the hatch or … read more
Amedee
Amedee
GMC Technician
Vocational, Technical or Trade Scho
455 satisfied customers
My reverse will not work. 2001 gmc yukon. No it just
it made a loud noise like someone hit me then slowed down on my way home and sounds like a dying cat… read more
Joshua Davenport
Joshua Davenport
33 satisfied customers
2009 hummer h3 alpha had fuel leak removed tank fixed leak
2009 hummer h3 alpha had fuel leak removed tank fixed leak re install did not put enought fuel in and tried to start blew fuse and getting p023f code and p0232 and p069e. had new pump on order install… read more
Expert-Repair
Expert-Repair
Owner Kingsland Auto & Marine Services
Vocational, Technical or Trade Scho
11 satisfied customers
Cant start my 2009 chevy express van 2500 anti theft wont
cant start my 2009 chevy express van 2500 anti theft wont let it stat rt … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I have a 2004 Yukon sky passenger side blows hot drivers
I have a 2004 Yukon sky passenger side blows hot drivers side cold I already reset it twice and it didn't work any suggestions? … read more
Gary
Gary
GMC Technician
Vocational, Technical or Trade Scho
1,537 satisfied customers
For a 2007 Escalade which the temp control only works
For a 2007 Escalade which the temp control only works occasionally is the blend door actuator the only thing which could cause the problem? … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
358 satisfied customers
My 94 gmc 5,7 new pump not coming on and new injectors no
my 94 gmc 5,7 new pump not coming on and new injectors no spray … read more
Amedee
Amedee
GMC Technician
Vocational, Technical or Trade Scho
455 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