NGK 7862 Spark Plug

NGK Laser Platinum Spark Plug 7862

NGK 7862 is a Laser Platinum spark plug built to OE-style specifications for a wide range of GM cars, trucks, and vans. It uses a platinum center electrode, nickel ground electrode, and a 0.060 in. pre-gap to support consistent ignition performance in applications such as Chevrolet Silverado 2500 HD, GMC Sierra 3500, and Pontiac Grand Prix.

Key Features

• Laser Platinum spark plug with platinum center electrode tip material
• Copper core center electrode for stable heat transfer
• Nickel ground electrode with standard configuration and single ground electrode
• 0.060 in. pre-gap for confirmed OE-style applications
• 5,000 ohm resistance for ignition system compatibility
• Tapered seat, 14 mm thread diameter, 5/8 in. hex size, and .708 in. reach
• NGK part number 7862; manufacturer part number PZTR5A-15

Product Details

NGK’s Laser Platinum line focuses on OE replacement fitment and long service life. As a major OE supplier in North America, NGK builds this spark plug to original-equipment standards for durability and consistent operation. The platinum tip helps maintain electrode integrity over time, while the copper core supports efficient thermal control. This makes NGK 7862 a direct-service choice for drivers maintaining factory-style ignition performance on vehicles like the Chevrolet Avalanche 2500, Buick Century, and GMC Yukon XL 2500.

This part cross-references Bosch 8117 for the same application.

Common Issues This Spark Plug Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent spark delivery
• Misfire conditions related to aged ignition components
• Reduced fuel economy from degraded combustion efficiency
• Loss of throttle response in high-mileage ignition systems

Installation Notes and Tips

Verify the vehicle’s required gap and seat type before installation. This plug is listed with a 0.060 in. pre-gap for many applications, and some fitments note a 0.050 in. gap, so confirm the engine-specific specification before use. Check the tapered seat, 14 mm thread diameter, and 0.708 in. reach against the original plug. For best results, install on a cool engine and follow the manufacturer’s torque specification.

Quality Assurance

NGK is a long-established OE spark plug manufacturer with broad coverage across domestic and import vehicles. Part number 7862 is built to OE-equivalent standards for the listed applications, including Chevrolet Silverado 2500 HD, GMC Sierra 3500, and Pontiac Grand Prix fitments.