SPOOLOGIC Turbo Step Gap Oil Seals

The SL-210-111 seal kit is for the Garrett GT3788VA serving the 6.6L Duramax LLY and LBZ application listed below. It supplies oil seal rings for service of the GT3788VA CHRA. Match the kit to the turbo identification and configuration before beginning work.

Features

• Compressor-side and turbine-side step-gap piston-ring style oil seals
• Seal-only service set for an existing CHRA with serviceable bearings, shaft and housings
• LLY and LBZ year ranges are listed separately. Confirm the installed GT3788VA turbo before ordering.

What's Included

• Compressor-side step-gap piston-ring style oil seal
• Turbine-side step-gap piston-ring style oil seal

Fitment

• 2004.5-2005 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LLY
• 2006 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LLY
• 2006-2007 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LBZ
• 2006-2007 Chevrolet Express GMC Savana 2500 3500 6.6L Duramax LLY

2007 pickups: Silverado Classic and Sierra Classic LBZ applications.

⚠️ Seal-Only Service

This kit contains oil seal rings only. Bearings, thrust parts, shaft, compressor wheel, turbine wheel, housings, gaskets and other assembly parts are not included. It will not correct bearing wear, shaft damage, housing damage or worn seal grooves.

Installation Notes

• Confirm turbo model and configuration before disassembly.
• Inspect the shaft, bearing clearances, seal grooves and mating surfaces; replace damaged or worn components as needed.
• Follow the correct turbocharger service procedure and verify oiling before startup.
• Have the completed rotating assembly high-speed balanced when the repair procedure or component replacement requires it.

Turbo Applications

• Garrett GT3788VA

⚠️ DIY Product — All Sales Final, No Warranty, No Returns

This SPOOLOGIC turbocharger repair product is intended for experienced turbo builders and qualified technicians. Proper installation requires suitable tools, careful inspection, and correct assembly. All sales are final—no warranty, returns, or exchanges. Confirm compatibility before ordering. See the SPOOLOGIC Warranty Policy for details on products sold without a warranty.