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ACDelco GM Original Equipment Engine Oil Filler Cap FC256

GM Original Equipment


An ACDelco GM Original Equipment Engine Oil Filler Cap is a threaded or quarter-turn cap that seals the oil filler opening on your vehicle’s engine, and is a GM-recommended replacement for your vehicle’s original component. It has a rubber sealing ring that keeps the engine oil and crankcase vapors in, while keeping water and dirt out. This original equipment engine oil filler cap has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Pricing: $17.01


Engine Oil Filler Cap

Get the GM quality you know and trust with ACDelco GM Original Equipment Thermostats and Caps. Stay with the brand of parts your General Motors vehicle came with and get peace of mind that the fit, form, and function is up to the high standards and specifications of General Motors. ACDelco GM Original Equipment Thermostats and Caps are engineered for virtually every model of GM car, light duty truck, and sport utility vehicle.

Warranty: 24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see for more details.

Features & Benefits:

  • Seals and helps keep oil from leaking out of your engine oil filler opening
  • GM-recommended replacement part for your GM vehicle's original factory component
  • Offering the quality, reliability, and durability of GM OE
  • Manufactured to GM OE specification for fit, form, and function


Q: Will a missing oil filler cap or breather cap cause oil leakage?
A: Yes, a missing oil filler cap can allow engine oil and vapor to escape, oil leaks can result in engine damage and are a safety concern also.

Q: Can I replace an oil filler cap or breather cap on my own?
A: Yes, replacing an oil filler cap is a simple process as long as you have the proper oil filler cap for your vehicle.

Q: Could a damaged or missing oil filler cap or breather cap affect engine performance?
A: Yes, In addition to potential loss of engine oil, some vehicles will idle poorly if the oil filler or breather cap is missing or damaged.

Maintenance & Troubleshooting

Signs of Wear & Troubleshooting

  • Signs of wear include:
    • Oil leak
    • Oil vapor odors
    • Uneven idle

Good Maintenance Practices

  • To begin, wipe off any debris around the oil filler cap to prevent debris from entering the engine upon removal.
  • Remove the oil filler cap by twisting it counterclockwise and removing it from the top of the engine.
  • Inspect the oil filler cap mating o-ring and/or mating surface for any cracks or splitting.
  • A cracked, worn, or split oil filler cap can cause debris and/or moisture to enter the engine.
  • A poor sealing cap can also cause a check engine light on OBDII vehicles (1996 and later).

California Proposition 65

California Prop 65WARNING: Cancer & Reproductive Harm -


  • FC256
  • FC256
  • ACDelco
  • New

Shipping Information

  • Item Requires Shipping
  • 0.4 lbs.
  • W6.3000” x H3.3000” x L9.3000”

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