GM GENUINE PARTS Fuel Tank Filler Cap GT295 (20915990) OEM threaded cap with rubber gasket

If your vehicle's fuel cap is worn, missing, or no longer sealing properly, replacing it with the GM Genuine Parts GT295 (20915990) returns the original fit and function. This cap is manufactured to GM specifications, includes a rubber gasket for a liquid-tight seal, and may include an internal check valve to equalize tank pressure. Using a correct OEM cap helps control fuel vapors, keeps contaminants out of the tank, and matches the durability drivers expect from General Motors parts.

How does this fuel cap protect my vehicle?

The GT295 creates a tight barrier between the fuel tank and the outside environment, preventing fuel leakage, dirt intrusion, and excess vapor release. That tight closure supports proper fuel system behavior and reduces exposure of the fuel to contaminants.

• Rubber gasket ensures a liquid-tight seal to stop leaks and seepage.
• Optional check valve balances internal tank pressure as designed.
• Factory-matched threading and dimensions to prevent cross-threading.
• Materials selected for resistance to fuel and environmental wear.

Will this cap fit my GM vehicle and how easy is it to install?

The GT295 is a GM-recommended replacement engineered to match original equipment specifications for compatible GM models. Installation is straightforward: align the cap on the filler neck, thread it by hand until snug, and confirm the seal—no special tools required.

• OEM fit means correct thread pitch and seating depth for compatible vehicles.
• Hand-tighten installation; avoid over-torquing to protect the gasket.
• Direct replacement—no adaptations or modifications needed when matched to your vehicle's part number.

What practical benefits will I notice after replacing my old fuel cap?

Swapping in a proper GM Genuine Parts fuel cap helps reduce fuel smell, limits vapor loss, and can stop the steady drip or slow leaks that increase trips to the pump. It also helps keep water and road grime out of the fuel system, which can protect downstream components.

• Reduced fuel odor and vapor emissions compared with a damaged cap.
• Fewer evaporative losses, supporting better fuel economy over time.
• Cleaner fuel tank interior reduces contaminant-related wear on fuel components.
• Preserves factory performance and aligns with GM service recommendations.

Who is this for? Drivers and technicians who want a direct, factory-equivalent replacement for a worn or missing fuel tank filler cap on compatible GM vehicles. If you value correct fit, reliable sealing performance, and maintaining your vehicle to OEM standards—whether for everyday commuting, fleet maintenance, or professional repair—this GM Genuine Parts GT295 (20915990) cap provides the straightforward solution you need.

Features at a glance:

• Provides a tight seal to keep your vehicle's fuel tank closed
• A sealed fuel tank reduces vapor emissions which helps the environment
• Prevents lost fuel in order to help reduce your trips to the gas station
• GM-recommended replacement part for your GM vehicle’s original factory component
• Offering the quality, reliability, and durability of GM OE