GCG TDX Upgrade Turbo GT3788VA Chevy GMC Duramax 6.6L LLY LBZ LMM 2004.5-2010

Description

Overview

The GCG TDX GT3788VA Turbo Chevy GMC Duramax 6.6L is a direct bolt-on upgrade for LLY, LBZ and LMM engines (2004.5–2010). Built by GCG’s TDX program, it features a purpose-designed billet compressor wheel that delivers about 20% more airflow than the factory unit. Consequently, towing improves, EGT control strengthens, and throttle response sharpens. It ships with gaskets for re-fitment and includes a 12-month manufacturer warranty. This performance part is intended for off-road use.

Key Features

• Direct bolt-on TDX upgrade for Duramax 6.6L LLY/LBZ/LMM (2004.5–2010)
• Billet compressor wheel engineered by GCG (~20% more airflow vs OEM)
• Quicker spool and stronger midrange torque
• Improved towing performance and EGT control
• Includes gaskets for straightforward re-fitment
• 12-month manufacturer warranty
• 100% bolt-on; no fabrication required
• Designed for off-road use

Specifications

• Turbo model: GT3788VA (TDX upgrade)
• Manufacturer code: 1000-01599
• Unit: TDX
• Weight: 15.0 kg
• Compressor wheel: Billet aluminium
• Turbo type: Variable geometry (VGT)
• Dimensions (mm): Not specified by manufacturer
• Inlet / Outlet sizes (mm): Not specified by manufacturer
• Finish/colour: Not specified by manufacturer

Note: If you require exact dimensional data in mm, contact us and we will confirm with GCG before dispatch.

What’s in the Box

• GCG TDX GT3788VA turbocharger assembly
• Gasket set for re-fitment
• Basic installation guidance (if supplied by GCG)

Compatibility

• Chevrolet Silverado 2500HD/3500HD – Duramax 6.6L LLY (2004.5–2006)
• Chevrolet Silverado 2500HD/3500HD – Duramax 6.6L LBZ (2006–2007)
• Chevrolet & GMC 2500HD/3500HD – Duramax 6.6L LMM (2007.5–2010)

Unsure about fitment? Send us your VIN and build date and we will verify compatibility before you order.

Delivery & Lead Times

• Australia-wide shipping available.
• Lead times depend on stock status. Please check with us for an accurate ETA if your job is time-critical.
• Pickup and professional installation available on the Sunshine Coast by appointment.

Professional Fitting Service on the Sunshine Coast

Our technicians can supply and install your new turbo on the Sunshine Coast. We follow best-practice procedures, replace required gaskets and fasteners, and pressure-test before road testing. We can also calibrate your ECU tune to suit the TDX upgrade for safe gains in torque and EGT management. Book your install and get a fixed-price quote today.