Considering an ECU remap for your GMC Envoy 4.2i - 270hp? A Stage 1 remap can take this 2002 - 2010 petrol engine from 270 BHP to 290 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 GMC Envoy can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The GMC Envoy 4.2i - 270hp is a 4.2L naturally aspirated petrol engine producing 270 BHP and 373 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 290 BHP and 395 Nm — a gain of around 20 BHP (7%) 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 |
|---|
| 5.3 V8 290hp | 290 → 310 | +20 | 441 → 460 | +19 | Limited (3.5/10) |
| 5.3 V8 300hp | 300 → 320 | +20 | 447 → 470 | +23 | Limited (3.5/10) |
Get a personalised remap quote for your GMC Envoy. 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.
