Cold Air Intake for GMC Sierra 1500 2500 (1999-2006) 4.8L 5.3L 6.0L Engine - Red

Your Sierra was built to work, but the factory intake system was built to be quiet. By prioritizing silence over airflow, GM left a significant amount of power and throttle response on the table. This direct-replacement intake system removes the restrictive stock baffling, allowing your Vortec V8 to finally breathe the way it was designed to.

Performance Cold Air Intake Upgrade for GMC Sierra (GMT800/Gen III Vortec)

If you drive a 1999-2006 GMC Sierra with the 4.8L, 5.3L, or 6.0L V8, you are driving one of the most reliable truck platforms ever built. However, the factory intake tract is compromised by a bulky airbox and an "accordion" style plastic intake tube designed to create turbulence and muffle engine noise. This restriction forces your engine to work harder to pull in air, resulting in sluggish throttle response, especially when towing or merging onto the highway.

This Cold Air Intake Upgrade replaces that inefficiency with smooth, mandrel-bent T304 aluminum piping. Unlike plastic, which can crack or retain heat, this aluminum tubing provides a direct, low-resistance path for airflow. By smoothing out the air path and replacing the restrictive paper filter with a high-flow conical element, we increase the volume and velocity of air reaching your throttle body. The result is a noticeable improvement in throttle snap and a broad increase in torque across the rev range.

Beyond the numbers, this upgrade transforms the character of your truck. Under normal cruising, it remains relatively civilized, but open the throttle, and you get that deep, aggressive induction growl that the Gen III LS-based engines are famous for. It’s a simple, bolt-on modification that corrects one of the few factory flaws in the GMT800 platform, giving you better efficiency and a much more engaging driving experience.

Why You Need This Upgrade

• Eliminates Airflow Restriction: Replaces the turbulent factory "accordion" tube with smooth T304 aluminum piping for consistent air velocity.
• Enhanced Throttle Response: Reduces the lag between your foot hitting the pedal and the engine responding, crucial for passing and towing.
• Aggressive Engine Tone: Removes the factory sound baffles to reveal a deep, sporty V8 induction sound under load.
• Long-Term Durability: The washable, high-flow air filter is designed to last 50,000 miles between cleanings, saving money on paper replacements.
• Factory Fit & Finish: Designed to mount into the truck using standard hand tools without requiring permanent modifications or cutting.

Installation Notes

Installation is straightforward and typically takes less than an hour with basic socket wrenches and screwdrivers. This system replaces the factory airbox and intake tube. Per standard procedure, it is highly recommended to disconnect your battery during installation. This forces the ECU to reset and "re-learn" the new fuel trims required for the increased airflow, ensuring you get the maximum performance benefit immediately without check engine lights.

Replaces These OEM Applications

• 1999-2006 GMC Sierra 1500 / 1500 HD with 4.8L/5.3L/6.0L V8 Engine
• 1999-2006 GMC Sierra 2500 / 2500 HD with 5.3L/6.0L V8 Engine
• 2001-2006 GMC Sierra 3500 with 6.0L V8 Engine
• 2002-2006 GMC Sierra Denali with 6.0L V8 Engine

Stop choking your V8 with the factory plastic box. Bolt on this Cold Air Intake today to improve your fuel economy, sharpen your throttle response, and give your Sierra the sound it deserves.