Universal Coolant Tank Float Switch, Duramax | 2001-2016

The Merchant Automotive Universal Coolant Tank Float Switch adds a low coolant warning to a custom or fabricated coolant tank on a 6.6L Duramax Silverado or Sierra 2500HD/3500HD. Most aftermarket aluminum coolant tanks have no level sensor, so swapping one in can leave you without a low coolant warning. This float switch mounts in your custom tank, and we wire it with a factory-style connector that plugs straight into the truck's original coolant level sensor plug, with no cutting or splicing. This switch does NOT fit the stock coolant tank.

Key Features

• Universal float switch for custom and fabricated coolant tanks
• Pre-wired with a factory-matched Packard connector that plugs into the stock harness
• Sealed terminals, heat-shrunk connections and sleeved wiring
• Assembled by Merchant Automotive
• 1-year warranty

Benefits

• Keeps the factory low coolant warning working after a custom tank upgrade
• Plug-and-play connection to the factory wiring, with no splicing
• Catches low coolant before it turns into overheating or engine damage

Important

This is a universal switch for custom applications. It will NOT fit the factory coolant tank. Your custom tank must have a provision for mounting the float switch.

Frequently Asked Questions

Will this float switch fit my factory coolant tank?
No. This is a universal switch for custom and fabricated coolant tanks. It will not fit the stock coolant tank.

Do I have to cut or splice any wiring?
No. We wire the switch with a factory-matched connector that plugs straight into your truck's original coolant level sensor plug.

Why would I need this?
Most aftermarket coolant tanks don't have a level sensor, so swapping one in leaves you without a low coolant warning. This switch connects your custom tank to the factory warning, so you'll still be alerted if the coolant gets low.

What does my custom tank need for this switch to work?
The tank needs a mounting provision for the float switch. If you're not sure your tank has one, contact us before ordering and we'll help you check.

Which trucks does it work with?
2001–2016 Chevrolet Silverado and GMC Sierra 2500HD/3500HD with the 6.6L Duramax (LB7, LLY, LBZ, LMM and LML) that have a custom coolant tank installed.

Fitment

• 2001–2016 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax with a custom coolant tank (LB7, LLY, LBZ, LMM, LML)
• 2001–2016 GMC Sierra 2500HD / 3500HD 6.6L Duramax with a custom coolant tank (LB7, LLY, LBZ, LMM, LML)

What's Included

• (1) Universal coolant float switch with sleeved wiring and a factory-style connector