Performance Chip Tuning Hummer H3
5 engines · +24 to +29 hp
Hummer H3: 5 engines — 5 gas. Gains run from +24 to +29 hp, with up to +39 Nm more torque. GAN GA+ from 199 EUR.
All Hummer H3 engines: exact gains
STOCK output, output with GAN, gain and price for each module.
| Engine | STOCK → with GAN | Gain | Tuners and prices | |
|---|---|---|---|---|
| Gasoline · 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 gets its own performance chip: GAN GT / GTL or GAN GA / GA+. Prices are per performance chip and include the current discount.
Not sure which engine you have?
The badge alone isn’t enough: in this generation, the same engine came with different horsepower ratings, each with its own calibration. Check the horsepower in your owner’s manual or vehicle documents and find the matching row.
Same badge, different factory power outputs in this generation:
Hummer H3 tune: what changes
More power and torque with no ECU flash and no new parts – the module only adjusts the engine sensor signals. Your factory warranty is preserved: the ECU software is never changed, and the module can be removed at any time.
- Bluetoothswitch modes from your phone
- 18 mapsto fine-tune your engine
- 15 minutesplug-and-play install
- IP67water and dust protection
- +29 hpbest in this generation
3.7i 239 hp → 268 hp. The other engines gain +24 hp and up; 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
Switch between SPORT, DYNAMIC, ECO and STOCK in the GAN app.
- 50 daystest drive
Enhanced performance or your money back, excluding shipping costs.
Hummer H3 tuning FAQ
Which tuner do I need for my Hummer H3?
Every engine in this generation is naturally aspirated, so you’ll want the GAN GA or GAN GA+. Find your engine in the table above – each row shows the tuner and the price.
Is a tuning module the same as a Stage 1 tune?
Not quite. Stage 1 usually means an ECU flash tune 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.