The SPOOLOGIC Turbo Vane Position Sensor Adapter SL-600-036 is the factory-style electrical adapter pigtail required when installing an updated GT3788VA-style vane position sensor onto the early LLY Garrett GT3788VA variable geometry turbocharger on 2004.5-2005 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LLY. It bridges the late-style sensor connector to the early LLY engine harness, allowing the newer, more reliable position sensor to be used as a direct upgrade.

This turbo vane position sensor adapter is a brand new direct-replacement unit built to OEM specifications and pre-tested to match the original factory part. It plugs into the factory engine harness and ECM without re-programming or modification — fits the original factory part out of the box, no tuning or piggyback module needed.

When You Need a Turbo Vane Position Sensor Adapter

This tool is required when:

• Standard 7/16″ or 24mm wrenches won’t fit around the VGT position sensor — the sensor sits in a recessed pocket on the turbo housing
• Stripping or rounding the sensor body when trying to remove it with pliers or vise grips — no factory tool clearance for normal sockets
• Cracking the sensor on removal — sideloading from incorrect tools

Built for the Factory Garrett GT3788VA Turbocharger

SPOOLOGIC tools and adapters are made to OEM dimensional specs so the part installs and operates exactly like a factory unit — no fitment shims, no modifications, no risk of damaging the turbo housing or sensor on install.

What’s Included

• (1) Vane Position Sensor Electrical Adapter Pigtail

Cross-References / Equivalent Tool Numbers

This part replaces the following factory OEM and aftermarket cross-reference numbers:

• GM OEM: 7718640001

Features

• Direct-fit turbo vane position sensor adapter for 2004.5-2005 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LLY
• Bridges the late-style GT3788VA sensor connector to the early 2004.5–2005 LLY engine harness
• Replaces 7718640001
• Brand new — pre-tested to OEM signal and fitment specs

Fits 2004.5-2005 6.6L Duramax LLY

• 2004.5 – 2005 Chevrolet Silverado GMC Sierra 2500 / 3500 6.6L Duramax LLY

1-Year Limited Warranty

Every SPOOLOGIC sensor and signal device is covered by a 1-Year Limited Warranty against defects in materials and workmanship from the date of purchase. Warranty coverage requires that the sensor first be shipped back to SPOOLOGIC for inspection. If SPOOLOGIC determines the failure was caused by a defect in materials or workmanship, the sensor will be replaced at SPOOLOGIC’s discretion. Warranty does not cover damage from improper installation, incorrect wiring or polarity, connector damage, moisture ingress from unsealed connectors, exposure to voltage or current beyond the device’s rated operating range, use with tuning or PCM modifications that alter the intended signal path, use outside the listed fitment, cosmetic wear, or normal heat cycling marks. Warranty does not cover labor, shipping, towing, downtime, or any other costs outside the sensor itself.