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Related Medium and Heavy Trucks Questions
1999 C7500 CAT 3126. THE COMPUTER FRIED. I installed a reman
1999 C7500 CAT 3126. THE COMPUTER FRIED. I installed a reman one programmed to my engine serial #. The engine starts and runs for about 30 seconds and shuts off. I connected my cheap scanner and it is… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
431 satisfied customers
I have a c7 that at a idle The engine hunts if you look at
I have a c7 that at a idle The engine hunts if you look at the computer it's commanding 1400 pounds and then all of a sudden it's commanding 2300 and starts running really erratic at an iidle We put i… read more
AaronF721
AaronF721
Lead Technician
Diesel Technology
4 satisfied customers
No stagaugert no oil pressure on. 03 chevy c 6500 3126 cat.
no stagaugert no oil pressure on JA: What is the complete model and serial number of your machine? Customer: 03 chevy c 6500 3126 cat JA: Are you fixing this yourself? What have you tried so far? Cust… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
I GOT 1 QUESTION I DONT NEED MONTHLY SUBCRIPTION. CAT 3126.
YES ,,FUSES LOOK GOOD DONT KNOW WHY LOW AIR WARNING LIGHT OR BUZZER NOT WORKING … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
431 satisfied customers
I have a 3126 cat in a 7500 Chevy, drove to work just fine
I have a 3126 cat in a 7500 Chevy, drove to work just fine then when I tried to leave the starter ingauged but died. Now I have power when I turn my switch on and my chassis are clicking but no power … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
Have a 6500 GMC cat 3217 dies intimately sometimes ruse for
Have a 6500 GMC cat 3217 dies intimately sometimes ruse for weeks before it dies. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a gmc 7500 with a cat that has a electrical problem
I have a gmc 7500 with a cat that has a electrical problem to the engine. Do you have a real good gmc mechanic available at this time. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I've got a 07 / 1999 Sterling L-7500 YAF91507 SERIAL # CAT
I've got a 07 / 1999 Sterling L-7500 YAF91507 SERIAL # CAT 3126 7AS81301I've got no engine data recieved. We have power and ground at plug under dash. I need wire schematic for engine ECM, schematics … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
I have a 2003 GMC 7500 with a 3126 cat, truck came in no
Hello, I have a 2003 GMC 7500 with a 3126 cat, truck came in no start no crank, could not communicate with ecm, checked power and grounds found all ok, replace ecm, now I can communicate with ecm and … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
I installed a different ECM on my 3126 cat and it still
I installed a different ECM on my 3126 cat and it still reads no ECM detected on scanner, just wondering what pins go to plug underneath the dash… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
I have 2005 gmc 7500 with a C7 3126 while cranking I have no
I have 2005 gmc 7500 with a C7 3126 while cranking I have no rpm but if I spray it with starting fluid it will start. I can keep it running as long as I keep the pedal going once I try to let it idle … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
I have got a 99 Chevy 6500 with the cat 3126 started putting
I have got a 99 Chevy 6500 with the cat 3126 started putting Deisal in the coolant and we are about 800 miles from home will it hurt to drive it… read more
Alex Olsen
Alex Olsen
auto/diesel/industrial
524 satisfied customers
I have a 1999 gmc 7500, 3126 cat engine, Vehicle has no
I have a 1999 gmc 7500, 3126 cat engine, Vehicle has no start signal at starter, good voltage to and out of ignition switch. Ignition switch and starter are new. I need a diagram of where this wiring … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I swapped out a c7 serial # ***** and installed a 3126 serial
I swapped out a c7 serial # ***** and installed a 3126 serial # ***** I put all the c7 sensors on the 3126 (plugged right in). the truck turns over but wont fire/start. any suggestions?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
i have a 2002 chevy c7500. it ran out of fuel. the gauge read
i have a 2002 chevy c7500. it ran out of fuel. the gauge read 1/4 tank but was faulty. ever since it won't start unless i prime the system. then it runs fine. i replaced the regulator and the transfer… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
I have a 2000 gmc c7500 with a 3126 cat in it. We hooked a
I have a 2000 gmc c7500 with a 3126 cat in it. We hooked a Cat Et up to it this evening with the right adapter I assume...7x-1714. The Cat et program says 1 ECM detected...initializing but not does an… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
Hello Cat Man: I have a 1999 Chevrolet C7500 with a Cat 3126
Hello Cat Man: I have a 1999 Chevrolet C7500 with a Cat 3126 engine. It just died while warmining up due to a lack of fuel. All fuel lines are clear and tight - no leaks. We have replaced the fuel shu… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
Chevrolet c6500: I have a 1998 topkick chevy truck 6500 series
I have a 1998 topkick chevy truck 6500 series 6 speed with a 3126 diesel cat motor,the speedometer,odometer and tach stop working..it runs but sputters going uphills,then it just seems like the pedal … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
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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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