The C10 3CS uses the same 70-pin ADEM II/III module as the 3406E and C12, so it is in our fastest lane: 2 days on the bench, programmed back to your engine serial, 2-year warranty.
Same electronics as the C12 and 3406E, same failures, same fixes.
What you see: A miss or dead hole that stays after an injector swap.
What's happening: Injector driver failure inside the module.
What we do: We rebuild the driver circuit and bench-fire every channel.
What you see: No tool will connect to the ECM.
What's happening: Data-link circuit failure.
What we do: We restore the data link on the bench so the module can be read and programmed.
What you see: Dead key-on, or stalls when hot.
What's happening: Internal supply or cracked-joint failure.
What we do: We repair at the component level and thermal-cycle the module on the bench.
What you see: Several 5-volt sensor codes together that do not clear.
What's happening: The sensor supply regulator inside the ECM has failed.
What we do: We repair the supply and verify every sensor channel.
Don't see your exact symptom? Send it in anyway. We bench-test every unit before we tell you what's going on, and if we fix it the diagnostic cost you nothing.
Give us your engine serial prefix and we know which module you have.
| Arrangement | ECM generation / connector | Our bench |
|---|---|---|
| 3CS | ADEM II/III, 70-pin | 2 days |
Self-ship free, or add a prepaid UPS label. Drop-offs in Princeton, MN by appointment. Include your engine serial number.
$350 bench fee, credited toward the repair. We tell you exactly what failed, usually within a day of receipt.
Injector driver repair, communication restoration, power-supply and 5-volt sensor supply repair, parameter recovery, whatever it needs. 2 days on the bench.
Programmed to your engine, every channel bench-tested, 2-year warranty. Status email at receipt, at diagnosis, and at ship.
If yours is beyond repair, or the truck can't wait: remanufactured, bench-tested, programmed to your engine serial, 2-year warranty. Usually ships the same day.
$745 flat, bench fee included. The $350 bench-test fee credits 100% to the repair.
2 days on the bench plus 1-3 days return shipping.
Yes, to your engine serial, and bench-tested before it ships.
Yes, tested 3CS units with a 2-year warranty, for trucks that cannot wait or modules that are beyond repair.
Related: Cat 70-pin ECM problems & symptoms · 3406E ECM repair · C12 ECM repair · C15 ECM repair
Verified Google reviews
"Mike does great work and sent my repaired ECM back to me right away. Saved me thousands of dollars vs. using the dealer. Would recommend to anyone that needs prompt repair."
"From ECMs and harnesses to straight-out cutting counter bores in-frame for us. Great shop — and a great person to have in your pocket."
"Highly recommend these guys! Fast turnaround — I had my ECM back and repaired by the next day. Will definitely do more business in the near future."
"Michael is a diesel guru. He made my rig scream and had it done when he said, for the price we agreed to. I'd highly recommend him."
"Mike is highly knowledgeable in all areas of diesel repair — from mechanical work to advanced electrical diagnostics. You can count on him to get the job done right."
"Mike is a very professional and skilled mechanic. I highly recommend him for any of your needs."
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