Denso 671-8187 Spark Plug Wire Set

Denso 7mm Spark Plug Wire Set

Denso First Time Fit ignition wire sets are built to match the original wire set in form, fit, color, and performance. Part number 671-8187 is a 7mm spark plug wire set made for direct OE-style replacement on select Cadillac, Chevrolet, and GMC applications.

Key Features

• 7mm insulation outside diameter for OE-style ignition wire routing and fit
• Silicone spark plug boot material for heat resistance and flexibility
• 180-degree spark plug end boot for proper terminal alignment
• Female spark plug end terminal type with male distributor/coil end terminal type
• Built to meet or exceed OE/OES standards in construction
• Direct replacement for select Cadillac Escalade, Chevrolet Corvette, Chevrolet Silverado 1500, Chevrolet Tahoe, GMC Sierra, and GMC Yukon applications

Product Details

The Denso 671-8187 ignition wire set is part of the Denso 7mm product line, which focuses on OE-style replacement components for factory-level fit and function. This wire set is engineered to mirror the original equipment layout and connection style, making it a practical choice for drivers servicing ignition systems on 2014-2019 Cadillac Escalade, Chevrolet Corvette, Chevrolet Silverado 1500, Chevrolet Tahoe, GMC Sierra, and GMC Yukon models. This part cross-references ACDelco 758EE for the same application.

Common Issues It May Address

• Misfires caused by worn or heat-damaged spark plug wires
• Hard starting related to weak ignition transfer
• Rough idle from deteriorated wire insulation or terminal wear
• Intermittent spark loss from poor boot or terminal contact
• Ignition performance decline on high-mileage OE wire sets

Installation Notes and Tips

Verify engine application and wire routing before installation. Match each lead to the original routing path to avoid crossfire or heat exposure issues. Inspect spark plugs, coil connections, and related ignition components during service so the replacement wire set can perform as intended on compatible Cadillac Escalade, Chevrolet Silverado 1500, and GMC Yukon applications.

Quality Assurance

Denso First Time Fit ignition wire sets are manufactured to OE/OES-level standards for form, fit, color, and performance. Part number 671-8187 is built as an OE-style replacement for select 2014-2019 Cadillac, Chevrolet, and GMC vehicles.