Cold Start Valve Hose, LB7 Duramax | 2001-2004

Cold Start Valve Hose, LB7 Duramax | 2001-2004

This molded cold start valve hose from Merchant Automotive is for the 6.6L Duramax LB7. It is built for diesel fuel and connects the fuel distribution block to the fuel test port, also called the cold start valve or service valve. The factory rubber hose is a common one to harden and crack on LB7 trucks, which can cause fuel seepage and let air into the fuel system. This hose replaces GM 97230321 and installs in the factory location.

Key Features

• Molded hose that replaces GM 97230321
• Built for diesel fuel
• Connects the fuel distribution block to the test port
• Molded to the factory shape for a direct-fit install
• Sold individually; one required per engine

Benefits

An aged cold start valve hose can seep diesel and pull air into the low-pressure fuel system, which leads to hard starts and a fuel smell under the hood. Replacing it when it's worn or damaged, or any time the fuel system is serviced, takes care of one of the original rubber hoses on the LB7. Replace if worn or damaged. Commonly replaced at the same time: Fuel Test Port Service Valve O-Ring, Duramax | 2001 - 2016.

Frequently Asked Questions

Does this hose come with clamps?
No. Clamps are not included. Reuse your factory clamps if they're in good condition.

Is there a kit with all the LB7 rubber fuel hoses?
Yes. Our Merchant Automotive Rubber Fuel Hose Kit, Duramax | 2001 - 2004 includes this cold start valve hose along with the feed, front feed, return, filter head outlet and FICM hoses.

Will this fit my LLY, LBZ or LMM?
No. This hose is for the 2001-2004 LB7 only.

Fitment

Fits 2001-2004 Chevrolet Silverado and GMC Sierra 2500HD and 3500 with the 6.6L Duramax LB7. One hose required per engine.

What's Included

• (1) Molded cold start valve hose
• Clamps not included

For warranty information or to submit a claim, see our Warranty Form.