Standard Ignition VVT590 Engine Variable Valve Timing (VVT) Sprocket

OE-Style VVT Sprocket for GM Engines

Standard Ignition VVT590 is a direct-fit engine variable valve timing sprocket built to restore accurate cam timing and smooth engine operation. It is engineered for Chevrolet, GMC, Cadillac, and Hummer applications where precise valve timing affects horsepower, torque delivery, idle quality, and emissions control.

Compatible With Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and related GM truck and SUV applications, this VVT sprocket is designed for service work that demands OE-style fit and function.

• Engine variable valve timing sprocket for OE replacement service
• Precision-machined for accurate timing control and drivability
• OE-matching sprocket tooth profile for quiet operation
• Designed to reduce leakage and lash for stable performance
• 100% end-of-line tested for OE-level performance verification
• Standard Ignition VVT590 for broad GM coverage

How It Restores Engine Performance

The Standard Ignition VVT590 helps restore the cam phasing response needed for proper variable valve timing operation. By maintaining accurate sprocket geometry and controlled lash, it supports smoother idle, improved throttle response, and consistent engine efficiency. This makes it a practical replacement for GM trucks and SUVs such as Chevrolet Tahoe, GMC Yukon, and Cadillac Escalade, as well as Chevrolet Camaro and Colorado applications listed in the fitment data.

This part cross-references Dorman OE Solutions 918-186 for the same application.

Common Problems It Can Address

• Rough or unstable idle caused by worn VVT sprocket components
• Loss of horsepower or torque from incorrect cam timing
• Excessive timing noise from tooth profile wear or lash
• Reduced engine efficiency tied to variable valve timing errors
• Emissions concerns related to inconsistent valve timing control

Installation Notes

Verify engine code, timing components, and OE part number before installation. Follow factory timing procedures and torque specifications during service, and inspect related chain, guide, and actuator components while the front cover is open. Standard Ignition VVT590 is a direct-fit replacement where listed, including Chevrolet Express 2500, GMC Savana 3500, and Silverado HD applications.

Quality Assurance

Standard Ignition states that this VVT sprocket undergoes 100% end-of-line testing to meet or exceed OE performance targets. The design also follows OE-style installation requirements where applicable, supporting accurate fitment and dependable operation across the listed GM applications.