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Related Medium and Heavy Trucks Questions
I have a 2000 GMC C6500 truck with a 7.4L Chevy gas engine.
I have a 2000 GMC C6500 truck with a 7.4L Chevy gas engine. What's involved with putting a Cat diesel engine in it instead. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
Customer presents a 2003 GMC VIN- ***************** with a
Good Morning, Customer presents a 2003 GMC VIN- ***************** with a Cat 3126 ESN- HEP18041. Customer states Oil Pressure, Battery Voltage, Engine Temp and Fuel gauges are INOP. Customer further s… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,615 satisfied customers
I installed a power sterring pump and now insted of pressure
I installed a power sterring pump and now insted of pressure i have Suction on the pressure line … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
Cat man, I am working on a CAT 3126 serial no. HEP44992 The
Hello Cat man, I am working on a CAT 3126 serial no. HEP44992 The truck is going into limp mode am I am getting a flash code of 39. I tried a different IAP sensor with no change. I tried turning over … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
Have a 96 kodiak topkick with 3116 CAT motor. was driving
have a 96 kodiak topkick with 3116 CAT motor. was driving down the road and it suddenly shut down, no lights no power to motor, nothing. pulled over and was able to restart after a few tries. alternat… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
Cat 3126 serial as 7AS11729 is spewing smoke. initially
cat 3126 serial as 7AS11729 is spewing gray smoke. initially flash code gave code 71. I replaced injector 1 ( the one closest to the radiator) and it is still smoking. the engine light right now has a… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
Got a 2001 gmc topkick with 3126 in it. Was running fine.
Got a 2001 gmc topkick with 3126 in it. Was running fine. Went to start long cranking. Had already run into bad inj actuation sensor couple weeks back. Fixed that. I unplugged the sensor again to test… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
2000 GMC Topkick with 3126 Cat will not start without ether.
2000 GMC Topkick with 3126 Cat will not start without ether. Seems ok once its running but if you slow down to stop it will die and will not restart without ether. Replace the fuel pressure regulator … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
I have 3126b cat some time driving i would get 70 miles and
Hi My Name is ***** ***** have 3126b cat some time driving i would get 70 miles and it would drop to 55 mile this is happening every day new turbo no code … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
7/99 Chevy C6500, need wiring diagram, has a Cat 3126,
7/99 Chevy C6500, need wiring diagram, has a Cat 3126, manual transmission. Serial # 1GBJ6H1C5YJ500112 Thanks Clay… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
3126 cat in a 1999 GMC topkick C6500, I made a swap and I
3126 cat in a 1999 GMC topkick C6500, I made a swap and I need the full ecu wiring, … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
I am looking at a 1999 c6500 GMC truck with a CAT 3126 engine
I am looking at a 1999 c6500 GMC truck with a CAT 3126 engine (SN 7a531378). Are there any known problems with this engine? Currently the engine has 86,000 miles.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
1999 Chevy C6500 3126 7AS31663 stalled while driving, swapped
1999 Chevy C6500 3126 7AS31663 stalled while driving, swapped IAPCV and speed sensors out of one our other trucks that starts up and runs, put a IAPCV harness and check this morning with ohm meter its… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
GMC c6500: I have a 2000 gmc c6500 and no start has a 3126
I have a 2000 gmc c6500 and no start has a 3126 cat. I also loose power to the pink wire at the brake light interface module can you tell me where it is located… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
WE HAVE A 2004 GMC C7500 WITH A CAT 3126 THE TRUCK QUIT RUNNING
WE HAVE A 2004 GMC C7500 WITH A CAT 3126 THE TRUCK QUIT RUNNING AND WONT START. OUR MECHANIC REPLACED THE LIFT PUMP STILL NO START WE COULD UNPLUG THE SENSOR ON THE TOP OF THE HIGH PRESSURE PUMP AND I… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
2000 GMC topkick with a 3126 cat engine. Shut off while running,
2000 GMC topkick with a 3126 cat engine. Shut off while running, will not restart. Checked voltage to ecm. 12 volts to pins 52 an 53 .I have 1200 psi. pressure in high pressure manifold while cranking… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
catman,your the best,once again im having issues on the 04
catman,your the best,once again im having issues on the 04 chev c6500 3126 cat. either its bad o-rings on the injectors again or the cups or o-rings below the injectors. i know before you said a bad h… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,353 satisfied customers
ON A GMC C6500 WITH A 3126 CAT ENGINE IS THERE A CALIBRATION
ON A GMC C6500 WITH A 3126 CAT ENGINE IS THERE A CALIBRATION STEP YOU DO WITH THE NEW PEDAL INSTALLED.… read more
FIX-IT
FIX-IT
Comercial transport technician
Vocational, Technical or Trade Scho
829 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

6,062 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,353 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

5,115 satisfied customers

worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

Certified Truck/Bus Technician

2,756 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

Curtis B.

Curtis B.

Technician

1,947 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

cumminsdr

cumminsdr

Mechanic

1,886 satisfied customers

All types of Cummins applications

Chris (aka-Moose)

Chris (aka-Moose)

Technician

641 satisfied customers

24 years of experience diagnosing & repairing

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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.

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