Champion 9777 Spark Plug

Champion Iridium Spark Plug 9777 Overview

Champion Iridium 9777 is a tapered-seat spark plug built with a fine-wire iridium center electrode and a platinum ground electrode for a focused spark event. It is a direct choice for a wide range of GM and Chrysler applications, including Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade models.

• Fine-wire iridium center electrode for sharp spark focus
• Platinum ground electrode with J-gap design
• Resistor plug for ignition system noise control
• Tapered seat with 1.00 in. reach
• 14 mm thread diameter and 0.625 in. hex size
• Champion Iridium classification for OE-style service applications

Champion Iridium Product Line Details

The Champion Iridium line uses iridium at the center electrode and platinum at the ground electrode to support consistent ignition performance under demanding conditions. Part number 9777 is built around a 0.100 in. center electrode diameter, a non-removable nut terminal, and a manufacturer heat range of 14.

This part cross-references Carlson 41114 for the same application.

Vehicle Fitment

• Fits 2023-2024 Cadillac Escalade, N/A
• Fits 2022-2024 Cadillac Escalade ESV, N/A
• Fits 2023 Chevrolet Camaro, N/A
• Fits 2023 Chevrolet Express 2500, N/A
• Fits 2023 Chevrolet Express 3500, N/A
• Fits 2023 Chevrolet Silverado 1500, N/A
• Fits 2023 Chevrolet Silverado 2500 HD, N/A
• Fits 2023 Chevrolet Silverado 3500 HD, N/A
• Fits 2023 Chevrolet Tahoe, N/A
• Fits 2022-2023 GMC Savana 2500, N/A
• Fits 2022-2023 GMC Savana 3500, N/A
• Fits 2023 GMC Sierra 1500, N/A
• Fits 2023 GMC Sierra 2500 HD, N/A
• Fits 2023 GMC Sierra 3500 HD, N/A
• Fits 2023 GMC Yukon, N/A
• Fits 2023 GMC Yukon XL, N/A
• Fits 2015-2022 Cadillac Escalade, N/A
• Fits 2016-2022 Chevrolet Camaro, N/A
• Fits 2018-2022 Chevrolet Express 2500, N/A
• Fits 2018-2022 Chevrolet Express 3500, N/A
• Fits 2014-2022 Chevrolet Silverado 1500, N/A
• Fits 2022 Chevrolet Silverado 1500 LTD, N/A
• Fits 2020-2022 Chevrolet Silverado 2500 HD, N/A
• Fits 2020-2022 Chevrolet Silverado 3500 HD, N/A
• Fits 2015-2022 Chevrolet Tahoe, N/A
• Fits 2014-2022 GMC Sierra 1500, N/A
• Fits 2022 GMC Sierra 1500 Limited, N/A
• Fits 2020-2022 GMC Sierra 2500 HD, N/A
• Fits 2020-2022 GMC Sierra 3500 HD, N/A
• Fits 2015-2022 GMC Yukon, N/A
• Fits 2015-2022 GMC Yukon XL, N/A
• Fits 2015-2021 Cadillac Escalade ESV, N/A
• Fits 2018-2021 GMC Savana 2500, N/A
• Fits 2021 GMC Savana 2500, N/A
• Fits 2018-2021 GMC Savana 3500, N/A
• Fits 2021 GMC Savana 3500, N/A
• Fits 2014-2019 Chevrolet Corvette, N/A
• Fits 2019 Chevrolet Silverado 1500 LD, N/A
• Fits 2019 GMC Sierra 1500 Limited, N/A
• Fits 2005-2010 Chrysler 300, N/A
• Fits 2008-2010 Dodge Challenger, N/A
• Fits 2006-2010 Dodge Charger, N/A
• Fits 2006-2008 Dodge Magnum, N/A

What This Spark Plug Helps Address

• Misfires caused by worn or eroded spark plug electrodes
• Hard starting from weak ignition output
• Rough idle and inconsistent combustion
• Reduced throttle response from degraded spark quality
• Ignition noise concerns in resistor-equipped systems

Installation Notes and Tips

Verify the tapered seat, 14 mm thread diameter, 1.00 in. reach, and manufacturer heat range before installation. For vehicles such as Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade, confirm the required gap specification in the service information for the exact engine application; some listed OE-style applications call for a 0.040 in. gap, while others specify 2 plugs per cylinder and a 0.044 in. or 0.050 in. gap.

Use the correct spark plug socket for the 0.625 in. hex and follow the vehicle service procedure for torque and gap verification. Champion 9777 is also referenced in OE-style service listings for GM and Chrysler platforms, including Chevrolet Camaro and Dodge Charger applications.

Quality Assurance

Champion Iridium plugs are built around iridium and platinum electrode materials for durable ignition service and consistent spark focus. Part number 9777 follows Champion’s iridium product line construction and OE-style fitment data for confirmed vehicle applications.