NGK 51438 Spark Plug Wire Set

NGK Spark Plug Wire Set for GM V8 Applications

NGK Spark Plug Wire Set 51438 is a specific-fit ignition wire set built for select Chevrolet and GMC trucks and SUVs from 2003-2007. It uses silicone insulation, a ferro mag core, and noise suppression construction to support stable spark delivery and reduced electrical interference.

Built under the NGK Spark Plug Wire Set line, this replacement part reflects NGK’s long OE-focused ignition background and attention to durability, fit, and operational performance. If you are servicing a Chevrolet Silverado 2500 HD, GMC Sierra 3500, or related GM application, part number 51438 provides a direct-fit ignition wire solution.

Key Features

• Specific-fit spark plug wire set for select Chevrolet and GMC applications
• Blue silicone insulation for heat resistance and flexibility
• Ferro mag core construction for ignition performance
• Noise suppression design to help reduce electrical interference
• 7.00 mm insulation outside diameter
• NGK part number 51438, also identified as RC-GMX109

Detailed Description

NGK 51438 is engineered as a replacement spark plug wire set for GM trucks and SUVs including the Chevrolet Avalanche 2500, Silverado 2500 HD, Silverado 3500, Suburban 2500, GMC Sierra 2500 HD, Sierra 3500, and Yukon XL 2500, plus 2007 Silverado 2500 HD Classic, Silverado 3500 Classic, Sierra 2500 HD Classic, and Sierra 3500 Classic. This specific-fit design helps ensure the wire routing and connection style match the listed applications. For buyers searching for a spark plug wire set for 2003-2006 Chevrolet Silverado 2500 HD or a replacement ignition wire set for 2003-2006 GMC Sierra 3500, NGK 51438 is the relevant part number to verify.

This part cross-references Gates 51438 and Delphi XS10542 for the same application.

What It Helps Address

• Misfires caused by worn or damaged ignition wires
• Hard starting related to weak spark transfer
• Rough idle from inconsistent ignition delivery
• Electrical noise that can interfere with ignition performance
• Heat-related wire deterioration in demanding engine bays

Installation Notes and Tips

Confirm the vehicle year, make, model, and engine application before ordering, since this is a specific-fit wire set. Match each wire to the original routing path and keep the boots fully seated on the spark plug and coil/distributor connection points. Inspect adjacent ignition components, including plugs and coils, during service to avoid repeat ignition faults.

Quality Assurance

NGK builds ignition products with extensive OE experience and global manufacturing standards focused on durability and operational performance. Part number 51438 is produced as a premium replacement ignition component for domestic and import vehicle service.