ACDelco CR43TS Spark Plug (19354425) — GM Original Equipment, Copper Core & Corrosion-Resistant

ACDelco CR43TS (19354425) is a GM-backed conventional spark plug built with a copper core and corrosion-resistant coatings to serve as a dependable original-equipment replacement.

This spark plug is engineered and validated by GM engineers to meet the fit, form, and function expectations of many Chevrolet, Buick, GMC, and Cadillac applications. Built as a premium aftermarket alternative, the CR43TS combines a high-quality copper center for efficient heat transfer, protective sheathing to resist corrosion, and suppression features that help maintain consistent ignition performance under typical driving and some marine conditions.

How does the CR43TS ensure reliable ignition?

The CR43TS uses a copper core center electrode that promotes effective heat transfer and consistent firing characteristics across a wide range of operating temperatures. It also includes a ribbed suppressor seal and nickel-chrome sheathing to protect electrode integrity and reduce electrical leakage.

• Copper core for efficient thermal conduction and consistent spark behavior
• Ribbed suppressor seal to reduce flash-over and minimize misfire risk
• Nickel-chrome sheathing to resist center-electrode corrosion
• Black Onyx coating on external metal to help prevent rust and seizing

Will this plug fit my GM vehicle and match OE standards?

Yes — ACDelco GM Original Equipment parts are designed or validated by General Motors to match original production specifications. The CR43TS is manufactured to meet OE tolerances for threads, reach, and heat range where listed by GM.

• Engineered to GM validation standards for correct fit and operation
• Manufactured with OE-style dimensions and materials
• Listed as an appropriate replacement for compatible GM service applications

Can I use these plugs in marine engines or harsh environments?

The CR43TS is offered for some marine applications and includes corrosion-resistant features that help when exposed to humid or salty conditions. While suitable for many service situations, always confirm compatibility and recommended service intervals for marine installations.

• Black Onyx coating to reduce external corrosion on the shell
• Nickel-chrome sheathing on the center electrode for added resistance
• Ribbed seal helps preserve suppression properties even in damp environments

How do these plugs support routine maintenance and longevity?

The combination of a copper core and protective coatings offers stable heat handling and extended service life under normal maintenance schedules. Proper installation, correct torque, and timely inspection will help maintain reliable operation comparable to OE expectations.

• Copper core balances heat transfer and durability for typical service intervals
• Corrosion-resistant finishes reduce risk of seizure at removal
• Designed to perform with common ignition and suppression systems found in GM vehicles

Who is this for: The ACDelco CR43TS (19354425) is intended for drivers and technicians seeking a genuine GM-validated conventional spark plug as a direct replacement for compatible Chevrolet, Buick, GMC, or Cadillac engines, and for owners who need a plug option suitable for select marine uses. Choose this part if you want a spark plug manufactured to GM-approved specifications, with copper core heat management and corrosion-resisting features for dependable everyday service.