GM

GM Repair Problems? Ask GM Repair Expert Now.

Ask an Expert,
Get an Answer ASAP!

GM

I have code po25a and message fuel pump module control

Customer Question
circuit open and garry told...
I have code po25a and message fuel pump module control circuit open and garry told me to check the voltage on the wire coming from ecm to fuel control module I did and told him was 5 volts and he told me is something wrong with ecm or green/white wire
but I cheked one more time and I had reading 12 volts that's mean this part is fine but my truck still don't start what can be wrong
Submitted: 2 years ago.Category: GM
Show More
Show Less
Ask Your Own GM Question
Customer reply replied 2 years ago
what going one nobody working there iam waiting and waiting and nobody answer
Answered in 6 hours by:
8/18/2015
GM Mechanic: Gary, GMC Technician replied 2 years ago
Gary
Gary, GMC Technician
Category: GM
Satisfied Customers: 17,282
Experience: 15 years gm master tech/15 years ASE master tech
Verified

I am sorry for the long wait

you are sure that wire has 12 volts when cranking it over ?

Ask Your Own GM Question
Customer reply replied 2 years ago
Now iam sure I had friend which he help me
GM Mechanic: Gary, GMC Technician replied 2 years ago

ok if that shows 12 volts when cranking it over then at the fuel pump module connector with the key ON does the red/white and one of the pinks show 12 volts with the key ON and is the black a good ground ?

Ask Your Own GM Question
Customer reply replied 2 years ago
I didn't check the different wires how I can check black wire can you tell me what's wrong if other wires don't have 12volts and tell me what I should do if other wires have 12 volts
GM Mechanic: Gary, GMC Technician replied 2 years ago

with a meter set to DC volts put the black meter lead into the block wire terminal in the connector and the red lead into the red/white wire terminal with the key ON it should show 12 volts if it does then just move the red meter lead to the 2 pink wires and one of them should show 12 volts with the key ON if it does then the fuel pump control module is bad

if neither wires show 12 volts set the meter to OHMS and leave the black meter lead to the black wire terminal and rub the red meter lead to a good metal ground it should show close to 0 ohms if not run a new good ground to the black wire

if the red/white wire or one of the pinks does NOT show 12 volts check the 2 fuses # ***** and # ***** for being blown

if those fuses check out good then those 2 wires from the under hood fuse box are bad between the fuse box and the fuel pump module connector

the odds are it will have a good ground and both powers and the fuel pump module will be bad

Ask Your Own GM Question
Customer reply replied 2 years ago
Okay iam going to check this and I will be back to you later thank you for now
GM Mechanic: Gary, GMC Technician replied 2 years ago

ok

Ask Your Own GM Question
Ask Gary Your Own Question
Gary
Gary
Gary, GMC Technician
Category: GM
Satisfied Customers: 17,282
17,282 Satisfied Customers
Experience: 15 years gm master tech/15 years ASE master tech

Gary 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

17,282 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
1996 ext cab - 4cyl - 5 speed - orig. owner - mileage
1996 ext cab - 4cyl - 5 speed - orig. owner - mileage 1,000,163. -BRAKES (!)(P) light just came on this weekend; after starting and releasing the brake to go -Have practically rebuilt this vehicle. On… read more
Mcgruder73
Mcgruder73
Auto Technician
Associate Degree
0 satisfied customers
Exhaust fluid system see owners manual now. 39,000 klm 2016
39,000 klm 2016 Sierra. Stopped and filled DEF but still have same message. … read more
Chris (aka- Moose)
Chris (aka- Moose)
GMC Technician
Vocational, Technical or Trade School
203 satisfied customers
I have a 1998 C1500 with automatic, 2 wheel drive. My son
I have a 1998 C1500 with automatic,***** My son borrowed the truck and said he broke the shift lever when he put it in park. … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
SALUDOS. 2013. CODE U0101-00. I put the keys to another car
I put the keys to another car misplaced and I have a problem with the trasmission … read more
Chris (aka- Moose)
Chris (aka- Moose)
GMC Technician
Vocational, Technical or Trade School
203 satisfied customers
2014 GMC the temperature gage down to 160 and when engine is
2014 GMC the temperature gage down to 160 and when engine is turned off the fan keeps running for awhile? … read more
GM Bob
GM Bob
Automobile Technician
High School or GED
989 satisfied customers
My 2011 SLT2 Acadia driver seat will not go forward or back.
my 2011 SLT2 Acadia driver seat will not go forward or back. Up and down is fine. My wife is short and cannot drive it as is. HELP. … read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
I've replaced my autoride suspension on my 07 Tahoe with
I've replaced my autoride suspension on my 07 Tahoe with conventional shocks and 5" lift. Id the recommended resistors (4) 1 at each shock and the service suspension light stays on … read more
kwiggins29059
kwiggins29059
Associate Degree
219 satisfied customers
I put 2 gallons of diesel by mistake. From a gas can. 2007
I put 2 gallons of diesel by mistake JA: How old is the engine? And when was it last serviced? Customer: From a gas can JA: What is the model/year of your GM? Customer: 2007 envoy JA: Are you fixing y… read more
Gary
Gary
GMC Technician
17,282 satisfied customers
ABS and Brake Light on. Both. With ABS codes B2610, U1000,
With ABS codes B2610, U1000, U1096, U1161 2005 Chevy Tahoe 5.3L … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I just got a 2003 H2 at an auction and wont shift gears
I just got a 2003 H2 at an auction and wont shift gears after 40mph and service 4wd light is on, vehicle has 129k miles, what should I check for? … read more
Chris (aka- Moose)
Chris (aka- Moose)
GMC Technician
Vocational, Technical or Trade School
203 satisfied customers
Low beams will not come on. 2007 GMC Envoy. Checked lamps,
yes - checked lamps, fuses. Both OK. High beams will only come on in manual, not with flicker. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Where is the day time running light module? Well my low beam
Well my low beam and running lights aren't working and there's no power at the fuse. It's an 04 envoy … read more
Mechanic01
Mechanic01
1,164 satisfied customers
Will the 20” rims of my previous owned 2011 Yukon Denali fit
Will the 20” rims of my previous owned 2011 Yukon Denali fit my 2015 Sierra Denali 1500 series… read more
Expert
Expert
13 satisfied customers
I have a 2007 Hummer H2 w a swing out spare tire mount. I
I have a 2007 Hummer H2 w a swing out spare tire mount. I would like to remove it. 1) is the removal of the swing arm simply an un-bolt or will I have to buy replacement parts. 2) I want to replace th… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
97 1500 5.7 Installed new fuel pump, Have 55psi at the rail,
97 1500 5.7 Installed new fuel pump, Have 55psi at the rail, only runs on either. What could have happened?… read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
Left rear cab is filling with water seem like the drain tube
left rear cab is filling with water seem like the drain tube is to short. shouild the drain tube exit through the in bottom of cab corner? … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
We have a 1997 GMC Sierra 4x4 we bought new and has 150,000
We have a 1997 GMC Sierra 4x4 we bought new and has 150,000 on it. The transmission torque converter was rebuilt at 49,600 miles. The problem is that when we put a stop Is that when we put a strain on… read more
Gary
Gary
GMC Technician
17,282 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
1,913 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