ACDelco Fuel Tank Lock Ring, Duramax | 2004.5 - 2025

The ACDelco TR26 fuel tank lock ring (GM part number 10325852) is the original-equipment ring that locks the fuel sending unit into the fuel tank. It fits Duramax diesel Chevrolet Silverado and GMC Sierra HD trucks from the 2004.5 LLY through the current L5P, plus Express and Savana vans and Colorado and Canyon trucks with the 2.8L Duramax. The ring twists into tabs on the tank and clamps the sending unit against its seal. A rusted, bent or cracked ring can let the seal leak fuel or fumes, or let the sending unit work loose. Replace it any time the sending unit is removed, especially on older trucks where the original ring has corroded.

Key Features

• ACDelco GM Original Equipment part TR26, GM 10325852
• Black steel construction
• Outside diameter 7.32 in (186 mm)
• Inside diameter 4.92 in (125 mm)
• Thickness 0.10 in (2.5 mm)
• Locks the fuel sending unit into the tank
• Cross references: Delphi FA10025, Spectra LO164

Benefits

A new OE ring gives full clamping force on the sending unit seal, so the tank seals properly and stays leak-free. Our 9" Lock Ring Pliers make removal and installation easier. If you are upgrading the sending unit, see the SureFlo Performance Sending Unit. For 2001-2004 LB7 trucks, use the TR14 Fuel Sending Unit Lock Ring.

Fitment

Fits 2004.5-2025 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD with the 6.6L Duramax diesel (LLY, LBZ, LMM, LML and L5P), and 2019-2024 Silverado 4500HD, 5500HD and 6500HD. Also fits 2006-2025 Chevrolet Express and GMC Savana vans with the 6.6L Duramax (LLY, LMM, LGH) or the 2.8L Duramax (LWN), and 2016-2022 Chevrolet Colorado and GMC Canyon with the 2.8L Duramax. Not for 2001-2004 LB7 trucks.

What's Included

• (1) ACDelco TR26 fuel tank lock ring