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I have a 3126 cat in a 7500 Chevy, drove to work just fine…

Customer Question
I have a 3126...

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 to starter. So I cranked it from the starter and cranked fine, run for mabey 20 sec them shuts off. Full of water and oil, with oil pressure at 50

Mechanic's Assistant: What is the complete model and serial number of your machine?

2000 7500 Chevy 3126b. Do not have the serial on me it's still on the job site

Submitted: 4 months ago.Category: Medium and Heavy Trucks
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Answered in 20 minutes by:
3/8/2018
Technician: Cat Man, Cat Engine Expert replied 4 months ago
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 9,405
Experience: I am ASE Master Truck Certified.
Verified
Thanks for asking your question. I will try and help you out.
Does the yellow check engine light come on when the key is turned to the on position?
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Customer reply replied 4 months ago
No everything else seems normal
Technician: Cat Man, Cat Engine Expert replied 4 months ago
Thanks for the information.
The yellow light should come on whenever the key is turned on. Since it does not and the start circuit for the starter runs through the engine ecm. I suspect you may have a failed ecm.
Unfortunately to verify. Cat ET software will be needed to verify.Please reply back if you need more help or have more questions. I am happy to assist.
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Technician: Cat Man, Cat Engine Expert replied 4 months ago
Hey. I just wanted to see how things were going. Please let me know if you need more help. I am happy to assist. If my information was helpful, please leave a good or higher rating so that I receive credit. Thanks.
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