GMC Sierra 1999 - 2007 4.3 V6 200hp
Real standard and upgraded performance figures for the 4.3 V6 200hp engine in the GMC Sierra 1999 - 2007.
Below: measured output for the 4.3 V6 200hp in the GMC Sierra 1999 - 2007, standard vs. remapped, in both horsepower and torque.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 200 | 350 |
| Stage 1 | 220 | 370 |
| Stage 2 | 230 | 380 |
- Make
- GMC
- Model
- Sierra
- Generation
- 1999 - 2007
- Engine
- 4.3 V6 200hp
- Fuel type
- petrol
Frequently asked questions
Is Stage 1 tuning safe for the GMC Sierra 1999 - 2007 4.3 V6 200hp?
Yes — Stage 1 for this engine is a software-only remap calibrated to stay within its stock mechanical limits (turbo, clutch, fueling), so no hardware changes are required.
How much more power does the 4.3 V6 200hp make after tuning?
Standard output is 200 HP / 350 Nm; Stage 1 on this engine typically reaches 220 HP / 370 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a GMC Sierra 1999 - 2007 4.3 V6 200hp remap take?
Once your original file is uploaded through the member panel, most requests for this engine are completed within a few hours.
Can the 4.3 V6 200hp be reverted to its original file?
Yes — we keep the original file on record for the request, so the ECU can be put back to stock at any time.