ACDelco Gaskets & Seals

ACDelco Gaskets & Seals: OE Precision Where It Matters Most

Few components in your engine carry as much silent responsibility as gaskets and seals. They stand between pressurized oil, coolant, combustion gases, and the outside world — and when one fails, the consequences ripple fast. ACDelco has built a reputation as one of the most trusted names in OE-grade sealing solutions, drawing directly from its deep roots in General Motors engineering to deliver parts that fit, function, and last exactly as intended.

Browse the full Gaskets & Seals category to explore ACDelco's broad lineup, which spans everything from critical engine internals to transmission and A/C system sealing components.

Two Distinct Lines, One Commitment to Quality

ACDelco approaches the gaskets and seals market with two complementary product tiers. ACDelco GM Original Equipment (OE) parts are the same components validated and installed at the factory — designed, engineered, and tested to rigorous standards, backed by General Motors, and representing the true OE parts installed during production or validated by GM for GM vehicles. These are the benchmark for fit and function on Chevrolet, Buick, GMC, and Cadillac platforms.

For technicians and enthusiasts working across a broader range of makes and models, ACDelco Gold (formerly ACDelco Professional) steps in as the high-quality alternative. ACDelco Gold Axle and Differential Seals, for example, are manufactured to meet expectations for fit, form, and function — making them a smart choice for GM vehicles as well as most makes and models, including special applications.

A Comprehensive Range of Sealing Solutions

ACDelco's gaskets and seals catalog covers virtually every sealing need a vehicle demands. Key product types include:

• Cylinder Head Gasket Kits – These kits seal the combustion chambers and coolant and oil passages between the cylinder head and engine block, and are GM-recommended replacements for original components.
• Crankshaft Oil Seals – Designed to seal the openings on either end of the crankshaft for a tight seal, these components withstand heat and pressure to help prevent the engine from leaking oil.
• Valve Cover Gaskets – Engine valve cover gaskets are designed, engineered, and tested to rigorous standards and are backed by General Motors.
• Differential Cover Gaskets – ACDelco GM Genuine Parts differential cover gaskets feature a steel core laminate construction , providing robust sealing under load.
• Transmission Seals – The lineup includes transmission rear seals, output shaft seals, and automatic transmission pump gaskets covering a wide range of GM transmission families.
• A/C System O-Rings & Seals – ACDelco Gold A/C seal repair kits and compressor seals keep climate control systems leak-free and properly pressurized.
• Fuel Injector Seal Kits – Fuel injector seal kits are designed, engineered, and tested to rigorous standards, helping provide liquid-tight connections between the fuel injector and related components.

Engineering Backed by GM's Continuous Development

What distinguishes ACDelco in the gaskets and seals segment isn't just lineage — it's ongoing refinement. GM engineers design and validate OE parts specifically for Chevrolet, Buick, GMC, or Cadillac vehicles, and GM regularly updates production and service part designs to integrate new materials and technologies. That means ACDelco sealing products evolve alongside the vehicles they serve, rather than remaining static catalog entries. Materials used across the lineup span rubber, silicone, PTFE, graphite, copper, steel, and multi-layer steel — each selected for its sealing properties in specific temperature, pressure, and chemical environments.

Whether you're performing a top-end engine rebuild, replacing a weeping rear main seal, or refreshing a leaking transmission, ACDelco's Gaskets & Seals catalog offers the OE confidence that comes from parts engineered and validated by General Motors.