Karlyn 766 Spark Plug Wire Set

Karlyn-STI 766 Spark Plug Wire Set

The Karlyn-STI 766 spark plug wire set is an OEM-style ignition wire replacement with black OEM boots and OEM engine fitment details. It is built for direct-fit service on a wide range of Chevrolet, GMC, Cadillac, Pontiac, Buick, Saab, and Hummer applications, including many V8 truck and SUV platforms.

Key Features

• OEM boot type for factory-style connection at the spark plug and coil ends
• Black wire construction for a clean, OE appearance
• OEM engine specification for application matching
• Fits many GM trucks, SUVs, performance cars, and vans
• Part number 766 for easy identification during ordering and service

Product Details

Karlyn-STI 766 is a spark plug wire set for ignition service on select GM and related vehicles. The fitment list includes applications such as 2009-2015 Chevrolet Camaro, 2009-2015 Chevrolet Silverado 2500 HD, 2009-2015 GMC Sierra 3500 HD, 2009-2014 Cadillac CTS, and 1997-2004 Chevrolet Corvette. It also covers many other Chevrolet Silverado, Suburban, Tahoe, Express, GMC Sierra, Yukon, Cadillac Escalade, Pontiac GTO, and Hummer H2/H3 models. For buyers searching for a Chevrolet Silverado spark plug wire set, GMC Sierra ignition wire replacement, or Cadillac CTS wire set, this part number 766 is listed across multiple OE-style applications.

Karlyn-STI is the product line designation for this ignition wire set, indicating the specific application-focused line within the Karlyn brand. This part cross-references Delphi round coil applications (e.g., 19005218) for the same application.

Common Issues Addressed

• Misfire caused by worn or damaged ignition wires
• Hard starting from weak spark delivery
• Rough idle related to deteriorated wire insulation
• Loss of ignition performance under load
• Intermittent spark transfer from cracked or aged boots

Installation Notes and Tips

Verify engine and coil configuration before ordering, especially on 2000s GM trucks and SUVs that use round coil OE number 19005218 with PN 5113 notes in the fitment data. Match each wire to the original routing path to avoid crossfire and heat damage. Inspect spark plugs, coil packs, and wire separators during installation so the ignition system is serviced as a complete circuit.

Quality Assurance

This Karlyn-STI ignition wire set is cataloged with OEM boot type and OEM engine specification for application-specific replacement. Confirm fitment against the vehicle year, make, model, and notes before installation.