ALLISON TRANSMISSION COOLER LINES FOR 2001-2005 (LB7-LLY)

Fleece Allison Transmission Cooler Lines — 2001–2005 GM Duramax LB7/LLY

Don't let failing OEM transmission cooler lines take out your Allison. The factory lines on 2001–2005 GM Duramax LB7 and LLY trucks are notorious for cracking and leaking under heat and load — leading to fluid loss, overheating, and costly transmission damage. Fleece's direct-fit replacement cooler lines are built to outlast the originals and keep your Allison running cool under any conditions.

Key Features

• Direct OEM Replacement — Bolt-in fitment for 2001–2005 GM Duramax LB7 and LLY applications; no modifications required
• Upgraded Construction — Engineered to handle higher temperatures and pressures than the factory lines
• Prevents Transmission Damage — Eliminates fluid loss and overheating risk caused by cracked or leaking OEM lines
• Towing & Heavy-Duty Ready — Built for trucks operating under sustained high-load and high-heat conditions
• Trusted Quality — Backed by Fleece Performance Engineering, a proven name in diesel drivetrain upgrades

Fitment

• 2001–2005 GM Duramax LB7 & LLY
• Allison Transmission

SKU: FPE-TL-LB7-LLY | Vendor: XDP