FLEECE ALLISON TRANSMISSION COOLER LINES FPE-TL-LB7-LLY | 2001-2005 6.6L Duramax LB7/LLY

Replace the leaking or damaged factory transmission cooler lines on your 2001–2005 GM 6.6L Duramax LB7 or LLY with the Fleece FPE-TL-LB7-LLY Allison Transmission Cooler Line Kit. Designed for improved durability and reliability, these heavy-duty high-flow transmission lines provide a dependable solution for maintaining proper fluid flow and cooling performance.

Engineered with flexibility and serviceability in mind, this kit includes all the necessary fittings for installation on trucks equipped with either the factory radiator or a Setrab-style aftermarket radiator.

Key Benefits:

• Replaces leaking, damaged, or deteriorated factory cooler lines
• Improves durability and reliability over stock components
• High-flow design supports proper transmission cooling
• Compatible with stock and Setrab-equipped radiator systems

Features:

• Heavy-duty transmission cooler line kit
• High-flow and flexible hose design
• Includes all required installation fittings
• Works with factory radiator or Setrab-equipped radiator setups

Kit Includes:

• 5/8" ID transmission lines
• (6) 7/8"-14 O-ring to -10AN fittings
• (2) 3/4"-16 O-ring to -10AN fittings
• (2) 1/2" NPT to -10AN fittings
• (2) M22x1.5 to -10AN Setrab fittings
• (2) Large OD washers
• (1) Double hose clamp
• (2) Locking cable ties

Fitment:

• 2001–2004 GM Silverado/Sierra 2500HD & 3500HD 6.6L Duramax LB7
• 2004.5–2005 GM Silverado/Sierra 2500HD & 3500HD 6.6L Duramax LLY

Note:

• Setrab fittings are included for trucks equipped with aftermarket radiators.
• Due to the wide variety of aftermarket cooling system combinations, fitment cannot be guaranteed on non-stock components.