Variant 1
ECU- Catalog engine
- 3600 304HP
- Controller brand
- DELCO
- ECU
- E39A3
- Stock power
- 304 HP
- ECU SW
- 12656454
- ECU HW
- 12653997
- SW upgrade
- 12656490
CADILLAC · E39A3 ECU
CADILLAC ATS E39A3 tuning files
Everything we work with on the CADILLAC ATS fitted with the E39A3. Across the matched variants stock power runs from 220 to 304 HP. 2 distinct variants are catalogued here. We start conservative here — Stage 1 and Stage 2 are the dependable baseline. Each file is tied to the precise software on your car and checked before it goes out.
Available solutions
Applicable work for the E39A3 on this vehicle. The available set firms up once the exact engine and software are known.
Engine variants & ECU software
2 distinct variants for the CADILLAC ATS on the E39A3 ECU. Reference the engine and controller software when you upload.
Variant 2
ECU- Catalog engine
- 2000 220HP
- Controller brand
- DELCO
- ECU
- E39A3
- Stock power
- 220 HP
- ECU SW
- 12656454
- ECU HW
- 12653997
- SW upgrade
- 12655821
Related vehicles
Other vehicles built on the E39A3 controller or the same engine — handy when a platform spans several models and makes.
Questions, answered.
Which tuning solutions are available for the CADILLAC ATS on the E39A3?
Stage 1, Stage 2. The exact set depends on the specific engine and software version.
Do you cover the E39A3 ECU software on this model?
Yes — the CADILLAC ATS on the E39A3 ECU is part of the catalog. Upload your original file and it is matched to the right calibration before any work is done.
How is the file delivered?
Through the TuningBay workflow with operator validation and one safe, sensible result per job. Files we deliver, we stand behind.