Fuel Rail to Fuel Return Hose, Duramax | 2004.5-2010

The Merchant Automotive Fuel Rail to Fuel Return Hose replaces GM 97321375 on 2004.5–2010 LLY, LBZ and LMM 6.6L Duramax Silverado and Sierra 2500HD/3500HD trucks. This hose carries return fuel from the fuel rail into the fuel return line. Factory rubber hoses get hard and crack with age and engine heat, which can cause fuel leaks, a diesel smell under the hood, and air getting into the fuel system. Our molded replacement is built for diesel fuel and made to match the factory hose's shape for a precise fit.

Key Features

• Replaces GM 97321375
• Molded to the factory shape for a precise fit
• Built for diesel fuel and resists degradation
• Merchant Automotive branded

Benefits

• Stops fuel leaks from a cracked or hardened factory hose
• Installs like the original, with no cutting or fitting
• A long-lasting fix for a common age-related failure

Installation Note

Clamps are not included. Reuse your factory clamps if they're in good condition, or replace them if they're rusted or weak.

Fitment

• 2004.5–2010 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax (LLY, LBZ, LMM)
• 2004.5–2010 GMC Sierra 2500HD / 3500HD 6.6L Duramax (LLY, LBZ, LMM)

Replacing fuel hoses? Also see our Injection Pump Return Hose (2006–2010), Injection Pump Return Hose (2004.5–2005), Fuel Injector Return Line Set and Fuel Rail Relief Valve O-ring.

What's Included

• (1) Merchant Automotive fuel rail to fuel return hose