12668390 12623116 Fuel Injectors For Sierra 1500 Yukon 5.3L V8 4.3L V6 2014-2018

Fuel Injectors 12668390 12623116 for 2014-2018 Sierra 1500 Yukon

These fuel injectors are direct replacement fuel injectors designed to restore proper fuel delivery and engine performance in compatible GM trucks and SUVs. They serve as OEM cross-reference replacements for part numbers 12668390 and 12623116, fitting 5.3L V8 and 4.3L V6 engines.

Overview

This set of fuel injectors provides reliable fuel metering for 2014-2018 GMC Sierra 1500 and Yukon models equipped with 5.3L V8 or 4.3L V6 engines. Each fuel injector is engineered to match OEM specifications for consistent spray pattern and flow rate. Whether you're replacing worn injectors or performing a tune-up, these fuel injectors restore fuel efficiency and engine smoothness.

Built For Performance

• Direct fit replacement for 12668390 and 12623116 part numbers
• Designed for 5.3L V8 and 4.3L V6 engines
• Precise fuel atomization for improved combustion
• Rugged construction resists clogging and wear
• OEM-style connectors for plug-and-play installation
• Tested for consistent flow across all operating conditions

Fits These Machines

• for GMC Sierra 1500 (2014-2018)
• for GMC Yukon (2014-2018)

On-The-Job Use

• Daily commuting and highway driving
• Towing and hauling heavy loads
• Off-road and work-site applications
• Engine rebuilds and performance maintenance

Specs At A Glance

Good To Know

Q: Are these fuel injectors a direct replacement? A: Yes, they are designed to directly replace the original injectors without modifications; simply unplug the old unit and install the new one.

Q: Do they include installation hardware? A: These injectors are sold as individual units; you will need to reuse your original mounting clips and O-rings or purchase a seal kit separately.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.