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I need to find a starter wiring circuit diagram for a C6500
I need to find a starter wiring circuit diagram for a C6500 GMC 1998 … read more
Andy
Andy
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Opened a question but no one has been assigned to my
opened a question but no one has been assigned to my account. getting rather frustrated that it takes days to get a response … read more
RyanY78
RyanY78
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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
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I have a 99 c6500 with a 3126. fast idle not working.
i have a 99 c6500 with a 3126. fast idle not working. looking for specs on what I should be looking for when testing the two wires at the switch. … read more
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I am having the same exact issue. 02 gmc c6500 cat 3126
02 gmc c6500 cat 3126 crank no start or start and sputter out. Flash codes 58 72 73 74 … read more
Cat Man
Cat Man
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I have a 2002 gmc C6500 that was idling rough and now won't
I have a 2002 gmc C6500 that was idling rough and now won't start it just cranks I counted the check engine flashes and got 58 39 74 72 73 44 and 49… read more
Wayne
Wayne
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I have a 1999 chevy c6500 I cannot get the cruise control to
I have a 1999 chevy c6500 I cannot get the cruise control to work. What controls the cruise on the engine. It is a cat 3126 engine. I replaced the brake switch because someone mentioned a lot of times… read more
Keiphun Sowell
Keiphun Sowell
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How many miles does a 3126 cat engine get up to before they
How many miles does a 3126 cat engine get up to before they tap out on average? Looking at a sweet deal on a c6500 but the miles are pretty high it has no blowby, no leaks it runs good. But I still pl… read more
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Keiphun Sowell
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I NEED A DIAGRAM OF UNDER GLOVEBOX FUSE BOX. FOR AC
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Mike Mcmillan
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I have a 97 C6500 with an Eaton 5 speed and it is stuck in
I have a 97 C6500 with an Eaton 5 speed and it is stuck in reverse. The shifter will also not move and its totally stuck. The clutch goes in and out and will engage fine but the shifter will not move … read more
Mike Mcmillan
Mike Mcmillan
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Have a cat 3126 cranks but does not start or stays running i
hey i have a cat 3126 cranks but does not start or stays running i had a tech come by and scan it he said it he said it was the heui pump i replace but still same issue what else can i check for … read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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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
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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
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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
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GMC c6500: I have a 2000 gmc c6500 and no start has a 3126
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Hi Cat Man, I am a used Cat Engine dealer, I get about 100
Hi Cat Man, I am a used Cat Engine dealer, I get about 100 calls a week for used Cat and other Diesel engines. Problem I find is that some of the calls are for Machine Engines and I mostly stock Truck… read more
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Cat Man
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I have a 1999 GMC C6500 with a 3126 Cat that will not start.
I have a 1999 GMC C6500 with a 3126 Cat that will not start. Cranks fine, Check engine light comes on and shuts off, has 4000 PSI Hydo pressure and fuel pressure bounces between 20 and 25 PSI at the p… read more
Daniel Wilson
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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
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Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

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I am ASE Master Truck Certified.

Wayne

Wayne

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

Jeremy

Jeremy

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

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Curtis B.

Curtis B.

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

Chris (aka-Moose)

Chris (aka-Moose)

Technician

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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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