Expected gains of +21 BHP and +22 Nm torque
Get Your Free Quote ↓Considering an ECU remap for your Chevrolet Trailblazer 4.2i 279hp? A Stage 1 remap can take this All petrol engine from 279 BHP to 300 BHP and from 373 Nm to 395 Nm of torque (naturally aspirated). This engine scores 4/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Chevrolet Trailblazer can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The Chevrolet Trailblazer 4.2i 279hp is a 4.2L naturally aspirated petrol engine producing 279 BHP and 373 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 300 BHP and 395 Nm — a gain of around 21 BHP (8%) and 22 Nm (6%).
This engine has limited remap suitability, though the available headroom is limited, so gains are modest compared to higher-output variants. The tuning headroom is classified as limited, based on the percentage gain available from the factory output.
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
| Engine | BHP | Gain | Torque | Gain |
|---|
| Score |
|---|
| 2.5d 163hp | 163 → 195 | +32 | 380 → 445 | +65 | Good (7/10) |
| 2.8d 200hp | 200 → 230 | +30 | 500 → 575 | +75 | Good (7/10) |
| 3.6 V6 279hp | 279 → 295 | +16 | 350 → 370 | +20 | Moderate (4/10) |
| 5.3 V8 305hp | 305 → 325 | +20 | 447 → 470 | +23 | Limited (3.5/10) |
| SS 6.0 V8 400hp | 400 → 420 | +20 | 542 → 565 | +23 | Limited (3/10) |
Get a personalised remap quote for your Chevrolet Trailblazer. We'll connect you with a trusted professional in your area.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.
We recommend discussing your specific vehicle with a qualified remap professional before proceeding.