Stage 3 AI OBD2 Performance Chip for GMC | Plug-and-Play Engine Tuning Module +40 HP / +45 TQ

Elevate Your "Professional Grade" Machine

Your GMC was built to get the job done. Now, let’s make it do it faster.

GMC vehicles are the definition of capability. Whether you are hauling heavy equipment with a Sierra Denali, transporting the family in a Yukon XL, or navigating the job site in a Canyon, you demand power and reliability. However, factory tuning often strangles the engine to meet economy standards, resulting in sluggish acceleration and annoying transmission shifts.

The Stage 3 "Pro-Grade" Performance Module is engineered to unlock the true potential of your truck or SUV. It optimizes the torque curve to eliminate throttle lag and maximize pulling power, ensuring your GMC drives with the authority its badge commands.

✔ Command More Torque. ✔ Smooth Out AFM/DFM. ✔ Duramax & V8 Optimized.

Why Upgrade to Stage 3?

• Heavy-Duty Towing Power: Safely unlock up to +40 Horsepower and +45 ft·lbs of Torque (on V8 and Duramax models). Pull trailers, boats, and campers without the engine feeling "winded."
• Fix the "Dead Pedal": Eliminates the hesitation found in modern drive-by-wire throttles. When you need to merge or pass, the response is instant and decisive.
• Smoother Cylinder Deactivation: Helps mask the "shudder" often felt when the engine switches between V8 and V4 modes (AFM/DFM), creating a seamless luxury driving experience.
• Terrain & Acadia Boost: Specifically tuned for the smaller Turbo engines (1.5T/2.0T/3.6L) to reduce turbo lag and improve city agility.
• Universal Compatibility: Works across the entire lineup, including Sierra (1500/2500/3500), Yukon, Canyon, Terrain, and Savana vans.
• Plug & Play Install: Installs in under 60 seconds via your OBDII port. No tools, no mechanic, and no downtime.

Smart Tuning for Premium Capability

GMC utilizes advanced "Global B" electrical architectures. The Stage 3 Tuner is designed to integrate safely with these complex systems.

The Duramax Advantage: Whether you have the 3.0L Baby Duramax or the 6.6L HD powerhouse, this chip optimizes fuel rail pressure and boost timing. It provides the low-end grunt needed to get heavy loads moving without spiking Exhaust Gas Temperatures (EGTs).

For the 6.2L V8 Denali/AT4: It unleashes the beast. The factory tune is very conservative to protect the transmission; our chip safely sharpens the shift points and throttle mapping to let that V8 roar.

100% Safe & Warranty Friendly

We know your GMC is a significant investment. The Stage 3 Performance Chip is 100% reversible. It does not permanently "flash" or rewrite your ECU.

Dealer Service Safe: If you need to visit the dealership for service or recalls, simply unplug the unit. Your truck returns to stock factory settings instantly.

Choose Your Performance Profile

The Stage 3 "Pro-Grade" is our flagship option, designed for the owner who uses their truck for both work and luxury.

Frequently Asked Questions

Does this disable Auto Start/Stop?
No, it does not permanently disable it, but the improved idle management often results in the engine engaging more smoothly when restarting at a stoplight.

Will this work on the AT4 and Denali trims?
Yes. These trims often have the same engines as the base models but heavier curb weights due to luxury features. The Stage 3 chip is essential for making these heavier trucks feel light on their feet.

Is it safe for towing heavy loads?
Absolutely. The "Pro-Grade" mapping is specifically designed for towing. It helps the transmission hold gears longer, preventing the transmission from overheating due to constant shifting on hills.

Does it work on the older Vortec engines?
Yes. It is compatible with all OBDII GMCs (1996+), including the classic Sierra and Yukon models with the 5.3L and 6.0L Vortec engines, restoring lost power due to age.

Estimated gains; results vary by vehicle, engine, modifications, and conditions. See our dyno results.