Does the Connector Kit for DeeZee Truck Bed Auxiliary Tank Have a Check Valve?

Updated 02/14/2026 | Published 02/10/2026

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Connector Kit for DeeZee Truck Bed Auxiliary Tank - Later Model Chevy/GMC, Dodge, and Ford

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DeeZee Specialty Series Truck Bed Transfer Tank - Rectangle - Aluminum - 39 Gallon - Silver

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Question:

Does the check valve prevent this from over flowing the OEM tank or the full neck, if left open?

asked by: Tim A

Expert Reply:

Hey Tim, welcome back. The Connector Kit for DeeZee Truck Bed Auxiliary Tank item # DZ97960 does not have a check valve to prevent overflowing your OEM fuel tank. It's got a manual shutoff to stop the flow of fuel into a auxiliary tank like the DeeZee item # DZ92556N you purchased. I do not have an alternative connector kit that includes a check valve.

Please note that on newer trucks like your 2025 Sierra 2500, you will not want to leave the valve open on the item # DZ97960. You'll set off sensors and get a check engine light notification.

If you have any additional questions, go ahead and click on the box that says Add Comment and I'll be happy to answer them.

expert reply by: Jerred H