Does the Connector Kit for DeeZee Truck Bed Auxiliary Tank Have a Check Valve?
Updated 03/04/2026 | Published 02/10/2026
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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.
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Product Page this Question was Asked From
Connector Kit for DeeZee Truck Bed Auxiliary Tank - Later Model Chevy/GMC, Dodge, and Ford
- Accessories and Parts
- Truck Tool Box
- Auxiliary Tank Connector Kit
- DeeZee
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Jerred H.
3/4/2026
Hey Tim, how did things go with the connector kit on your Sierra 2500 after using the manual shutoff? Your update could make it easier for others setting up a similar auxiliary tank.