Denso 671-6284 Spark Plug Wire Set

Denso 7mm Spark Plug Wire Set for GM V8 Applications

Denso First Time Fit ignition wire sets are built to match factory-installed wire sets in form, fit, color, and performance. This Denso 671-6284 spark plug wire set uses 7mm insulation and silicone spark plug boots to support reliable ignition performance on select Chevrolet Express 1500, Silverado 1500, GMC Savana 1500, and Sierra 1500 applications.

Key Features

• 7mm insulation outside diameter for OE-style wire routing and fit
• Silicone spark plug boot material for heat resistance and durability
• 180-degree spark plug end boot design
• Female spark plug end terminal type
• Female distributor/coil end terminal type
• Built to meet or exceed OE/OES standards in construction
• Direct replacement style for select GM truck and van ignition systems

Product Details

The Denso 671-6284 is a spark plug wire set engineered for direct-fit replacement on select GM V8 platforms. The First Time Fit product line focuses on OE-style dimensions and performance characteristics, making it a practical choice when replacing worn ignition wires on a 2007-2013 Chevrolet Silverado 1500, 2008-2014 Chevrolet Express 1500, 2008-2013 GMC Savana 1500, or 2007-2013 GMC Sierra 1500. This part cross-references ACDelco 746UU and NAPA Mileage Plus 6716284 for the same application.

Common Issues This Part Can Address

• Misfires caused by aged or damaged spark plug wires
• Hard starting related to weak ignition transfer
• Rough idle from deteriorated wire insulation or boot wear
• Intermittent spark loss from poor terminal contact
• Heat-related ignition performance decline in engine bay conditions

Installation Notes and Tips

Verify engine application and wire routing before installation. Match each lead to the original routing path to avoid crossfire, and inspect coil and spark plug terminals for corrosion or carbon tracking before connecting the new wires. The female terminal ends and 180-degree spark plug boots should be seated fully to maintain secure contact.

Quality Assurance

Denso First Time Fit ignition wire sets are manufactured to align with OE-style fitment and performance expectations. Construction is specified to meet or exceed OE/OES standards, supporting consistent replacement quality for GM ignition service.