Autolite 1120 Diesel Glow Plug

Autolite Diesel Glow Plug 1120

Autolite 1120 is a diesel glow plug built for dependable cold starts and consistent pre-heating performance. With a copper glow plug material, 45W 4.7V rating, and a 60-second pre-heating time, it is specified for a range of diesel passenger cars and light trucks.

The Autolite Diesel Glow Plug line focuses on OE-style fit, form, and function for diesel ignition service. Part number 1120 is engineered for applications that require concentrated heat delivery and a direct replacement approach for common diesel starting concerns.

Key Features

• Part number: 1120
• Connector type: 4mm
• Glow plug material: copper
• Glow plug rating: 45W 4.7V
• Hex size: 12mm
• Thread size: 10mm x 1.25
• Overall length: 5.37 in. (136.5 mm)
• Pre-heating time: 60 seconds

Detailed Description

Autolite 1120 diesel glow plug is built for diesel engines that need reliable heat generation during startup. The copper construction and 45W 4.7V specification support fast, concentrated heating, while the 10mm x 1.25 thread and 12mm hex size provide the dimensional details needed for proper service selection. This glow plug is used across diesel applications including Chevrolet Express 2500, Chevrolet Silverado 2500 HD, GMC Savana 3500, GMC Sierra 2500 HD, and other listed diesel platforms.

Fits 2022 Chevrolet Express 2500, N/A. Fits 2022 Chevrolet Express 3500, N/A. Fits 2022 GMC Savana 2500, N/A. Fits 2022 GMC Savana 3500, N/A. Fits 2020 GMC Canyon, N/A. Fits 2019 Chevrolet Equinox, N/A. Fits 2016 Chevrolet Express 3500, N/A. Fits 2016 Chevrolet Silverado 2500 HD, N/A. Fits 2016 Chevrolet Silverado 3500 HD, N/A. Fits 2016 GMC Savana 3500, N/A. Fits 2016 GMC Sierra 2500 HD, N/A. Fits 2016 GMC Sierra 3500 HD, N/A. Fits 2006-2016 Chevrolet Express 2500, N/A. Fits 2006-2015 Chevrolet Express 3500, N/A. Fits 2005 Chevrolet Silverado 2500 HD, N/A. Fits 2006-2012 Chevrolet Silverado 2500 HD, N/A. Fits 2013-2015 Chevrolet Silverado 2500 HD, N/A. Fits 2007-2015 Chevrolet Silverado 3500 HD, N/A. Fits 2006 Chevrolet Silverado 3500, N/A. Fits 2007 Chevrolet Silverado 2500 HD Classic, N/A. Fits 2007 Chevrolet Silverado 3500 Classic, N/A. Fits 2006-2015 GMC Savana 2500, N/A. Fits 2006-2015 GMC Savana 3500, N/A. Fits 2006-2015 GMC Sierra 2500 HD, N/A. Fits 2007-2015 GMC Sierra 3500 HD, N/A. Fits 2007 GMC Sierra 2500 HD Classic, N/A. Fits 2007 GMC Sierra 3500 Classic, N/A. Fits 2006 GMC Sierra 3500, N/A. Fits 2006 Hummer H1, N/A.

This part cross-references 61G and 1559469 for the same application.

Common Diesel Starting Issues

• Hard starting in cold weather
• Extended crank time before ignition
• Rough startup on diesel engines
• Glow plug circuit service on listed Chevrolet and GMC diesel models
• Replacement of a worn or slow-heating glow plug

Installation Notes and Tips

Verify connector type, thread size, hex size, and overall length before installation. Confirm the vehicle’s glow plug system requirements, including applications that use a voltage controller, and match the part to the exact engine configuration listed for your Chevrolet Express, Silverado, GMC Savana, Sierra, Canyon, Equinox, or Hummer H1 application.

Quality Assurance

Autolite supplies ignition products for automotive aftermarket and original equipment applications, with OE form, fit, and function as a core product standard for many of its spark plug and glow plug offerings.