Chiptuning Hummer H3
5 engines · +24 to +29 hp
Hummer H3: 5 engines — 5 petrol. The gain is +24 to +29 hp, with up to +39 Nm more torque. GAN GA+ from 199 EUR.
All Hummer H3 engines: exact gains
Standard output, output with GAN, the gain and the price for each box.
| Engine | STOCK → with GAN | Gain | Tuning boxes and prices | |
|---|---|---|---|---|
| Petrol · 5 engines | ||||
| 3.7i239 hp / 328 Nm | +29 hp+39 Nm |
GA — 199 EUR · 268 hp GA+ — 199 EUR · 268 hp |
Select → | |
| 3.7i242 hp / 327 Nm | +29 hp+39 Nm |
GA — 199 EUR · 271 hp GA+ — 199 EUR · 271 hp |
Select → | |
| 3.5i223 hp / 305 Nm | +27 hp+37 Nm |
GA — 199 EUR · 250 hp GA+ — 199 EUR · 250 hp |
Select → | |
| 5.3i300 hp / 433 Nm | +24 hp+35 Nm |
GA — 219 EUR · 324 hp GA+ — 219 EUR · 324 hp |
Select → | |
| 5.8i300 hp / 434 Nm | +24 hp+35 Nm |
GA — 219 EUR · 324 hp GA+ — 219 EUR · 324 hp |
Select → | |
Each engine has its own tuning box: GAN GT / GTL or GAN GA / GA+. Prices are per box and include the current discount.
Not sure which engine you have?
The badge alone is not enough: in this generation, the same engine designation came in different power outputs, each with its own calibration. Check the power output in your registration document and find the matching row.
Same badge, different factory power outputs in this generation:
Hummer H3 remap: what changes
More power and torque without rewriting the ECU or swapping any parts. The GAN box only adjusts the engine sensor signals. Your manufacturer’s warranty is preserved: the ECU software is never changed, and the box can be removed at any time.
- Bluetoothchange modes from your phone
- 18 mapsfine-tuning for your engine
- 15 minutesfitted to the factory connectors
- IP67water and dust protection
- +29 hpbest in this generation
3.7i 239 hp → 268 hp. The other engines gain at least +24 hp; check the table for each one.
- up to +30%more power
GAN GT: up to 30%, GAN GTL: up to 25%, GAN GA+: up to 12%.
- GAN APPpower control via smartphone
SPORT, DYNAMIC, ECO and STOCK modes in the GAN app.
- 50 daystest drive
Feel the difference or get your money back, excluding delivery costs.
Hummer H3 remap: common questions
Which tuning box do I need for the Hummer H3?
Every engine in this generation is naturally aspirated, so it takes the GAN GA or GAN GA+. Find your engine in the table above – each row shows the box and its price.
Is a tuning module the same as a Stage 1 remap?
Not quite. Stage 1 usually means an ECU remap without replacing any parts. The tuning module also works without replacing parts, but it does not change the ECU software: it adjusts the sensor signals, comes off in about a minute, and the OFF button in the app restores the factory settings.