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Original files › Delco › E86 › 12657305 12667378 › GMC Sierra
Delco · E86

12657305 12667378 E886B2FA7F6B461E Delco E86 GMC Sierra (6.6L 451hp) Stock ECM File (ORI)

All GMC Sierra Delco E86 files · 5 All GMC Sierra files · 48 All Delco E86 files · 11 Browse GMC
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About this file

This is the stock ECM file 12657305 12667378 E886B2FA7F6B461E for GMC Sierra 6.6L 451hp: Delco E86, hardware (HW) 12657305, software (SW) 12667378. To buy it, use Quick buy below — €20 by card, no registration, a ready-to-use .bin file by e-mail — or buy it with a file-service account (register or log in and top up your balance). Also you can find all available options on our platform for emissions removal (DPF, EGR, AdBlue) or improving power with stage 1/2/3 or ECO tuning.

This is an original (stock) read of a Delco E86 ECM. Our catalogue lists it for the GMC Sierra 6.6 451hp.

Its numbers in the catalogue: hardware (HW) number 12657305, software (SW) number 12667378 and calibration number E886B2FA7F6B461E.

Two other files in our catalogue have the same pair of numbers (12657305 / 12667378); one of them differs in the vehicle; one of them differs in the engine; one of them differs in the calibration. The versions list below links them: compare their numbers with your own read.

In our catalogue the hardware number 12657305 is on 13 files for 2 vehicles and the software number 12667378 is on 6 files for 2 vehicles.

All GMC Sierra Delco E86 files: 5 in our catalogue.

What you receive
  • The original (stock) read of this ECU, exactly as read — no modifications.
  • A ready-to-use .bin file by e-mail — nothing to unpack or rename.
  • The original read only — no full backups, EEPROM, SGO, VBF or other formats.

Before you order
  • All sales are final. Check HW, SW and calibration against your own read before you buy.
  • Different tools expect different file sizes when writing to the ECU — make sure the file suits your device.

File specifications
Brand name and modelGMC Sierra
Engine power6600 451HP
Engine code—
ECU brand nameDELCO
ECU model nameE86
ECU hardware12657305
ECU software12667378
ECU calibrationE886B2FA7F6B461E
ECU SW upgrade—
Other files with these numbersHW 12657305 · SW 12667378

3 files with these numbers

They share the hardware and software numbers; the calibration and the vehicle tell them apart. Compare them with your own read — this page is E886B2FA7F6B461E.

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The original .bin and its map pack (CSV) — for WinOLS and compatible software

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  • 236 tuning maps for this software version — Injection System, Turbo System, Rail, Engine Torque…
  • X / Y axes labelled correctly, correct factors
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  • Axes checked against this original: 434 of 434 read correctly
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WinOLS map pack for this file 236 maps

A WinOLS map export (CSV) made for this software version: tuning maps only, with correctly labelled X and Y axes and the correct factor for the data values — no maps for switching off emissions or errors. Maps by category:

Injection System · 119 mapsTurbo System · 38 mapsRail · 33 mapsEngine Torque · 28 mapsDeactivations · 10 mapsLimiters · 8 maps

For example: Fuel quantity injected f(RPM,Trq), Fuel quantity limiter, Limiter of Turbo pressure f(APS), Turbo pressure, Rail pressure, Rail pressure limiter f(RPM,Fuel_Q), Limiter of Maximum torque, Limiter of Maximum torque f(APS)…

See all 236 maps and buy — €60 All Delco E86 mappacks

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