Product Description
Genuine GM 12684590 Crankshaft Harmonic Balancer Pulley – L83 L86 L8B 5.3L 6.2L
Fits 2014–2020 GM Truck & SUV Engines | 8th VIN Digit C, J, or R ONLY
The Genuine GM 12684590 Harmonic Balancer Pulley is the correct OEM replacement for worn, cracked, or failing balancers on 2014–2020 L83, L86, and L8B 5.3L and 6.2L truck/SUV engines. Designed and manufactured as original GM equipment, this balancer reduces torsional crankshaft vibrations while serving as the pulley for your engine accessory drive system. Built to exact GM specifications, it delivers the performance, durability, and service life you expect from General Motors. The 8th digit of your VIN must be C, J, or R for proper fitment. Will NOT fit L84, L87, or other later Gen V engine variants.
Key Features & Benefits
- Genuine GM Original Equipment – Factory-engineered harmonic balancer built to GM specifications for proper fit, balance, and long-term durability.
- Reduces Torsional Vibrations – Helps protect the crankshaft and rotating assembly by minimizing harmful vibration for smoother engine operation.
- Accessory Drive Pulley Function – Serves as the pulley for engine accessory drive belts while maintaining proper alignment and performance.
- Direct OEM Replacement – Installs as a direct replacement for the original factory balancer with no modifications required.
- VIN-Specific Fitment – 8th VIN digit must be C, J, or R. Will NOT fit L84, L87, or other Gen V engine variants.
Key Fitments (8th VIN Digit = C, J, or R)
- CADILLAC ESCALADE 2015-2020
- CHEVROLET EXPRESS 2500 2018
- CHEVROLET EXPRESS 3500 2018
- CHEVROLET SILVERADO 1500 2014-2019
- CHEVROLET SUBURBAN 2015-2020
- CHEVROLET TAHOE 2015-2020
- GMC SAVANA 2500 2018
- GMC SAVANA 3500 2018
- GMC SIERRA 1500 2014-2018
- GMC SIERRA 1500 LIMITED 2019
- GMC YUKON 2015-2020
- GMC YUKON XL 2015-2020
