Your Vehicle
GMC Sierra 8,1 V8 330hp
Technical Specifications
Power and torque increase
Stage 1: software remap only, no mechanical changes, fully reversible.
Power HP
Torque Nm
Book your Stage 1 remap
499 € VAT included · pay online, the work is done at the workshop you choose
Power Graph
GMC Sierra 8,1 V8 330hp: da 330 a 350HP
Remapping GMC Sierra
MasterTuning is a leader in developing remapping for GMC. La GMC Sierra 8,1 V8 330hp può passare da 330 HP a 350 HP con un incremento di 20 HP.
The development of each remap is customized by MasterTuning.
- 100% tested and customized files guarantee
- Tested and developed on a 4x4 dyno
- Best performance, within safety margins
- Reduced fuel consumption
ECU Remapping Details GMC Sierra 8,1 V8 330hp
The GMC Sierra 8,1 V8 330hp is equipped with a petrol engine that produces 330 HP and 610 Nm of torque in its factory configuration. With MasterTuning's professional ECU remapping, this GMC can achieve 350 HP (+6%) and 630 Nm (+3%).
Our Stage 1 tuning for the Sierra 1999 - 2007 delivers an impressive gain of +20 HP and +20 Nm, optimizing the petrol engine's performance while maintaining reliability and staying within safe parameters.
The engine code L18 identifies this specific powerplant configuration.
With 330 HP from factory, this GMC Sierra is already a performance vehicle. Our remapping extracts even more potential, delivering exhilarating acceleration and enhanced driving dynamics for enthusiasts who demand the best.
Technical Specifications — GMC Sierra 8,1 V8 330hp
Factory technical data for the GMC Sierra 8,1 V8 330hp (1999 - 2007), used by MasterTuning engineers to develop a tailored, dyno-tested remap for this specific powerplant.
| Engine code | L18 |
|---|---|
| Fuel | Petrol |
| Compression ratio | 9.1 |
| Bore × stroke | 107.9 X 111.0 mm |
| Stock power | 330 HP · 610 Nm |
| Remapped power (Stage 1) | 350 HP (+20) · 630 Nm (+20) |
Don't want to touch the ECU?
Rapid Dimsport add-on modules connect to the engine sensors with original connectors: they fit in a few hours and come off without a trace, leaving the factory software untouched. Useful on a leased car, one still under warranty or one you plan to sell soon. Check which ones fit your GMC Sierra.
Frequently Asked Questions - GMC Sierra
How much power can I gain from remapping my GMC Sierra?
With MasterTuning Stage 1, your GMC Sierra 8,1 V8 330hp can gain +20 HP (from 330 to 350 HP) and +20 Nm of torque. This represents a 6% increase in power.
Is ECU remapping safe for the GMC Sierra engine?
Yes, MasterTuning's remapping for the GMC Sierra 8,1 V8 330hp is developed within safe parameters. All calibrations are tested on our 4x4 dyno and stay within the mechanical limits of the L18 engine.
Is the GMC ECU remapping reversible?
Absolutely. The original factory calibration of your GMC Sierra is always backed up before remapping. The process is 100% reversible at any time.
Will remapping affect my GMC warranty?
ECU remapping may affect your manufacturer warranty. We recommend checking your specific warranty terms. Many of our customers choose to remap after the warranty period or accept this trade-off for the significant performance gains.
Other Remaps You Might Like
Other Engines GMC Sierra 1999 - 2007
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Book your remap or ask for a quote
Stage 1 can be bought online and is done at the workshop you choose; for Stage 2 we send you a quote.
Stage 2 is quoted on request: write to us and we will reply with price and timing.
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