GM GENUINE PARTS GT360 Fuel Tank Cap — Black OEM Replacement with Rubber Gasket, Threaded Fit

This GM-recommended replacement fuel cap is built to match the original equipment specification for many General Motors vehicles. It features a molded rubber gasket for a liquid-tight seal and may include a pressure-sensitive check valve that allows controlled air exchange to balance tank pressure. Manufactured to GM tolerances, the GT360 cap helps maintain fuel system integrity and the fitment you expect from factory parts.

How does this fuel cap keep fuel and contaminants out?

The GT360 uses a precision-threaded design plus a resilient rubber sealing gasket that compresses against the filler neck to prevent liquid and debris intrusion. A properly seated cap blocks rainwater and road dirt from entering the tank and minimizes fuel loss from splashing or siphoning.

• Threaded construction for secure mechanical engagement
• Rubber gasket creates a liquid-tight barrier at the filler opening
• Durable materials resist fuel exposure and road grime

Will this cap affect emissions or fuel economy?

Replacing a worn or missing cap with a correct OEM-style item reduces evaporative vapor loss from the fuel tank, helping the system perform as intended. While a fuel cap alone won’t dramatically change fuel economy, it helps prevent vapor escape and supports the vehicle’s evaporative system diagnostics.

• Seals vapor pathways to reduce hydrocarbon emissions
• Supports proper operation of EVAP system checks and sensors
• Helps avoid fuel odor and minor fuel loss from vaporization

Is this cap compatible with my GM vehicle and easy to install?

The GT360 (22921365) is made to OEM dimensions for direct-fit replacement on specified GM models; reference your vehicle’s parts list or VIN to confirm fitment. Installation is straightforward—thread the cap onto the fuel filler neck and rotate until it seats; no tools or special steps are typically required.

• OEM part number 22921365 for correct GM fit where specified
• Simple hand-tighten installation—no special tools needed
• Designed to match factory thread pitch and sealing surface

How durable is the GT360 fuel cap and what maintenance is needed?

Constructed to GM original-equipment standards, the cap uses fuel-resistant plastics and a long-life rubber gasket for sustained sealing performance. Routine checks during fuel ups—confirming the gasket is intact and threads are clean—are usually all that’s necessary to maintain reliable operation.

• Engineered materials resist fuel and weather exposure
• Gasket designed for repeated installation cycles without rapid wear
• Low maintenance: clean threads and replace if gasket shows damage

Who is this for: Drivers who own compatible GM vehicles and need a factory-recommended replacement cap that restores original sealing, prevents contamination and vapor loss, and maintains correct EVAP system behavior. Ideal for DIY maintenance, fleet servicing, or anyone replacing a lost, damaged, or worn fuel cap and preferring genuine GM quality over generic alternatives.