Variant 1
ECU- Catalog engine
- 5300 305HP
- Controller brand
- DELCO
- ECU
- E38
- Stock power
- 305 HP
- ECU SW
- 12628994
- SW upgrade
- 12629107
HUMMER · E38 ECU
HUMMER H3 E38 tuning files
HUMMER H3 on the E38: matched, calibrated and delivered with care. Across the matched variants stock power runs from 240 to 305 HP. There are 9 distinct variants on file for this combination. We start conservative here — Stage 1 and Stage 2 are the dependable baseline. Every file is matched to the exact calibration on your vehicle and signed off by an operator.
Available solutions
Applicable work for the E38 on this vehicle. The available set firms up once the exact engine and software are known.
Engine variants & ECU software
9 distinct variants for the HUMMER H3 on the E38 ECU. Reference the engine and controller software when you upload.
Variant 2
ECU- Catalog engine
- 5300 305HP
- Engine code
- LH8
- Controller brand
- DELCO
- ECU
- E38
- Stock power
- 305 HP
- ECU SW
- 12630465
- SW upgrade
- 12630213
Variant 3
ECU- Catalog engine
- 3700 242HP
- Controller brand
- DELCO
- ECU
- E38
- Stock power
- 242 HP
- ECU SW
- 12617631
- SW upgrade
- 12609199
Variant 4
ECU- Catalog engine
- 3700 242HP
- Controller brand
- DELCO
- ECU
- E38
- Stock power
- 242 HP
- ECU SW
- 12618588
- SW upgrade
- 12619152
Variant 5
ECU- Catalog engine
- 3700 242HP
- Controller brand
- DELCO
- ECU
- E38
- Stock power
- 242 HP
- ECU SW
- 12620193
- SW upgrade
- 12618188
Variant 6
ECU- Catalog engine
- 3700 242HP
- Controller brand
- DELCO
- ECU
- E38
- Stock power
- 242 HP
Variant 7
ECU- Catalog engine
- 3700 242HP
- Controller brand
- DELCO
- ECU
- E38
- Stock power
- 242 HP
- ECU SW
- 12631999
- SW upgrade
- 12630377
Variant 8
ECU- Catalog engine
- 3700 240HP
- Controller brand
- DELCO
- ECU
- E38
- Stock power
- 240 HP
- ECU SW
- 12635973
- SW upgrade
- 12635625
Variant 9
ECU- Catalog engine
- 3700 240HP
- Controller brand
- DELCO
- ECU
- E38
- Stock power
- 240 HP
- ECU SW
- 12628994
- ECU HW
- 12605811
- SW upgrade
- 12629106
- Calibration
- 12657478
Related vehicles
Other vehicles built on the E38 controller or the same engine — handy when a platform spans several models and makes.
Questions, answered.
Which tuning solutions are available for the HUMMER H3 on the E38?
Stage 1, Stage 2. The exact set depends on the specific engine and software version.
Do you cover the E38 ECU software on this model?
Yes — the HUMMER H3 on the E38 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.