Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

I have a 2007 Chey Silverado 2500 4X4 6.6L TD Crew Cab. Over…

Customer Question
I have a 2007 Chey...
I have a 2007 Chey Silverado 2500 4X4 6.6L TD Crew Cab. Over the last six months I have had error codes for glow plugs 7 and 8. I have had the following replaced:
All 8 glow plugs replaced last August. 3 day later error codes for glow plugs 7 and 8 return.
Replaced glow plugs 7 and 8 again. 1 day later error codes for glow plugs 7 and 8 return.
Replaced fuses in glow plug harness. 1 day later error codes for glow plugs 7 and 8 return.
Replaced Glow Plug Control Module. 1 day later error codes for glow plugs 7 and 8 return and temperature now reading 30 DEG over at 208 DEG.
Replaced both thermostats coolant and temperature sensor. 1 day later error codes for glow plugs 7 and 8 return and temperature still reading 30 DEG over at 208 DEG.
What could be the issue.... Alternator, ECM????
Submitted: 2 years ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 45 minutes by:
2/24/2016
Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 2 years ago
Juan Crespo
Juan Crespo, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1,532
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
Verified

The OBD-II computer takes a snap shot of the most relevant engine parameters at the same it sets a particular code. Knowing that, I need to ask you some questions in order to get an idea of how to best help you solve this issue:

  • What compelled replacement of all those parts you mention?
  • What are the specific codes we're talking about?
  • Was any of the accompanying freeze frame data saved? If so, can you upload it along with its corresponding code?
Ask Your Own Chevy Question
Customer reply replied 2 years ago
Original problem was glow plug 7 and 8 badI don't know the codes. Ivan stop by the prolegs on the way home and get the current codes.No
No
Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 2 years ago

I'm sorry, but it looks like I won't be able to help you. I'll opt out so others may try. Please do not reply until another expert responds or the site will revert the request back to me.

Best Regards.

Ask Your Own Chevy Question
Chevy Mechanic: piciu1982, Chevy Technician replied 2 years ago
piciu1982
piciu1982, Chevy Technician
Category: Chevy
Satisfied Customers: 109
Experience: automotive technician
Verified

hi, can you provide me your VIN nr

Ask Your Own Chevy Question
Customer reply replied 2 years ago
Hello,
Im at work and will provide the vin when I get home.Thanks
Customer reply replied 2 years ago
1gchk23dx7f180232
Chevy Mechanic: piciu1982, Chevy Technician replied 2 years ago

you have to check wiring between glow plug control module and glow plugs, sometimes terminal by the glow plug is rusted and needs to be replaced, easiest way to check it is disconnect GPCMand use a test light connected to battery positive terminal and touch all terminals in the plug, if glow plug is good, test light will illuminate, it has to be regular test light !!, test light will illuminate on 9 terminals 8 glowplugs and gpcm ground !

Ask Your Own Chevy Question
Customer reply replied 2 years ago
Roger, I will test it this weekend and let you know what I find. Now would this affect the temperature reading? It just started reading 30 degrees over here in January. I have also lost 3 mile to a gallon as well. Last time GM checked the system the only issue they could find was the temperature sensor reading off. They said that is was causing the computer to send the wrong voltage to the glow plugs causing the gpc to give an error code. This is why I replaced the coolent, thermostats and temperature sensors. Before this it never read over 181 even on very hot days
Chevy Mechanic: piciu1982, Chevy Technician replied 2 years ago

best way to check temperature reading is with the scan tool after it sits overnight, all temperatures should b very close or even . so intake air, coolant temp, egr, egt sensors, transmission oil, engine oil, you will know right away if sensor is bad or with one is causing problems , also as for glow plugs it will delay glow plugs but will never set circuitd codes for individual glow plugs

Ask Your Own Chevy Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a chevy mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15,659
15,659 Satisfied Customers
Experience: GM Grand Master Technician 2007. 14 years 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:

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)

Chevy Technician

15,659 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,642 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,884 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,953 satisfied customers

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

Ron Z.

Ron Z.

- Chevy Tech -

2,836 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
I have error code P2463 showing as well as error code P244B.
I have error code P2463 showing as well as error code P244B. And I am also in the middle of nowhere at the moment … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
I have a 2006 chevy silverado hd with a 6.6l diesel engine.
I have a 2006 chevy silverado hd with a 6.6l diesel engine. in the past year I have had the check engine light come on and it is always refering to a glow plug bad. I have replaced #8, 6, 1. now the l… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet C2500 4x2: I have a 1995 6.5l diesel 1 ton pickup.
I have a 1995 6.5l diesel 1 ton pickup. If I let it sit overnight, it takes 20 -30 seconds to start after the glowplug light goes off, and if I kill the engine and restart it fairly quickly (say, with… read more
RandyNetwork Tech
RandyNetwork Tech
1,756 satisfied customers
I have a 2006 chevy silverado 2500 hd with a 6.6l diesel engine,
I have a 2006 chevy silverado 2500 hd with a 6.6l diesel engine, engine light is on and i have a code P0676. what is causing this code?… read more
Don - Mo Lurch
Don - Mo Lurch
Auto Mech / Electronics
Vocational, Technical or Trade Scho
2,953 satisfied customers
chevy: recently bought..duramax (lb7) with 92k92ku miles..Stalled
Hi, i recently bought a used 02 chevy silverado duramax (lb7) with 92k92ku miles. In 9the months i now have put 10k miles. Stalled last week. Two dealers later i find out that a glow plug melted throu… read more
Hal
Hal
owner/service tech
Vocational, Technical or Trade Scho
848 satisfied customers
Chevy Colorado: I have the following code from a check engine light
I have the following code from a check engine light on my Chevy Colorado, 2004. B0899, U1064 and P0128....any ideas how bad my repairs are? any help would be appreciated.… read more
rodcuda
rodcuda
Auto repair pro, 30 years experience
Associate Degree
74 satisfied customers
2001 chevy: durmax truck runs good..injectors..heater relay
2001 chevy 6.6 durmax truck runs good for 15 to 20 minuts than losses power if you shut it down and re start it is ok for a while than losses power also a code for large fuel leak but no visable leak … read more
John
John
Master A.S.E Automotive technician
2 YEARS COLLEGE
4,071 satisfied customers
When replacing head gaskets on 2005 6.6l, would removal..cab
When replacing head gaskets on 2005 6.6l, would removal of cab make it easyer. If this is right where would I find procedure.… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,659 satisfied customers
Gm: turbo diesel..engine, check engine light came..glow plug
I have a 2003 silverado, 2500 hd 6.6l turbo diesel lb7 engine, check engine light came on with code po 380 (glow Plug) taken to Jeff Gordon Chev., on 10/06/2003 while traveling and diagnoised as bad g… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
2003 2500 HD with a 6.6 turbo deisel..runs great..all the fuses
I have a 2003 2500 HD with a 6.6 turbo deisel with a no start condition cold, With it plugged in and you keep priming it, it will finally go, Glow plug light lights on dash, runs great after its runni… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,659 satisfied customers
2001 chevy: turbo diesel..My check engine light is on..glow plug
I have a 2001 chevy silverado 6.6 turbo diesel. My check engine light is on. they tell me that it is my glow plug sensor and after they reset it, after 2 starts it returns. Is this true?… read more
zzdaryl
zzdaryl
Lead Auto Tech
Some college and advanced training
4 satisfied customers
2002 chevy silverado 2500: gas it dont want to rev up it..blue smoke
I have a 2002 chevy silverado 2500 duramax and it has code p0380 and it is missing and when you try to to give it gas it don't want to rev up it's putting out blue smoke what do you think could be cau… read more
Ironmike
Ironmike
ASE Master L1 performance ,Ford tech
Vocational, Technical or Trade Scho
1,773 satisfied customers
2001 chevy: duramax..cranks..it over1900rpm check engine light comes
i have a 2001 chevy 2500 duramax with 188000 miles,cranks and idles fine when you run it over1900rpm check engine light comes on and truck goes back to idle it shows code98 LARGE FUEL LEAK and its put… read more
John
John
Master A.S.E Automotive technician
2 YEARS COLLEGE
4,071 satisfied customers
2002 chevy: it cranks over good but..park..10 minutes later
i have a 2002 chevy duramax,for the past year i had a problem with engine not wanting to start. it cranks over good but will not start.i could drive it,park it and go to start it 10 minutes later and … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,659 satisfied customers
i have a 83 chevy suburban with a 6.2l diesel. it wont start
i have a 83 chevy suburban with a 6.2l diesel. it won't start in the mornings but once i get it started it will start on its own all day. What do you think this is?… read more
rodcuda
rodcuda
Auto repair pro, 30 years experience
Associate Degree
74 satisfied customers
2005 Chevy: Silverado..cranks..wont start..rpm..no glow plug voltage
2005 Chevy 3500 Silverado duramax cranks but won't start cold. No trouble codes stored, Modis troubleshooter recommended watching for rpm signal, sufficient at cranking speed. noticed no glow plug vol… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,659 satisfied customers
I have a 2004 2500 Chevy Silverado 4x4 with a 6.0L vortec engine.
I have a 2004 2500 Chevy Silverado 4x4 with a 6.0L vortec engine. I am getting a whinning noise from the engine. After the engine is warmed up the noise seems to get quieter . But everytime I stop at … read more
Billy
Billy
Shop Foreman
Vocational, Technical or Trade Scho
355 satisfied customers
2002 chevy: wont start..cranks..45000 allison trans 4x4 crew cab
i have 2002 chevy duramax wait to start light did not come on, and wont start just cranks, fuel guage reads below e and it has 1/4 tank last time i drove yesterday. mileage is 45000 allison trans 4x4 … read more
John
John
Master A.S.E Automotive technician
2 YEARS COLLEGE
4,071 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