Cloyes VC143 Engine Variable Valve Timing (VVT) Sprocket

Overview

Cloyes VC143 is an engine variable valve timing sprocket, also known as a camshaft phaser, for vehicles with VVT service needs. It is built for higher-mileage repairs and is engineered to restore precise cam timing and stable engine operation.

This part fits a wide range of Chevrolet, GMC, Cadillac, and Hummer applications, including Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade models. The VC143 part number is used across multiple GM truck, SUV, and van platforms where accurate valve timing is critical.

Key Features

• Variable valve timing sprocket for engine timing service
• Premium-material construction for repair durability
• 100% tested and measured for function, fitment, and durability
• Checks adjustable angle, leakage, locking pin function, and friction
• Includes new torque-to-yield attachment bolts and valving bolts

Detailed Description

The Cloyes VC143 VVT sprocket is a direct engine timing component for GM applications that use a camshaft phaser. It is designed and manufactured to support accurate phasing control, which helps maintain proper engine timing response and consistent operation. The VC143 part number is associated with a broad fitment range that includes Chevrolet Express, Silverado, Suburban, Tahoe, Camaro, Colorado, GMC Savana, Sierra, Yukon, Cadillac Escalade, and Hummer H2/H3 platforms.

Cloyes tests each unit for key functional points, including angle adjustment, leakage control, locking pin operation, and friction. The included torque-to-yield attachment bolts and valving bolts support proper installation and phaser function. This part cross-references GM 12606358 for the same application.

The Engine Variable Valve Timing (VVT) Sprocket line is aimed at timing-system repair where cam phaser wear, timing instability, or control issues are present. For system stability, Cloyes recommends replacing the timing chain, tensioners, sprockets, and guides at the same time as VVT components.

What It Is Used For

• Restoring variable valve timing control when a cam phaser is worn
• Addressing timing irregularities in GM VVT-equipped engines
• Correcting leakage, friction, or locking pin function concerns
• Supporting repair of engine noise or timing-related drivability issues
• Replacing a failed VVT sprocket during timing system service

Installation Notes and Tips

Verify fitment by year, make, and model before installation. This part fits 2007-2020 Chevrolet Silverado 1500, 2007-2019 Chevrolet Silverado 2500 HD, 2007-2019 Chevrolet Silverado 3500 HD, 2008-2020 Chevrolet Express 2500, and other listed GM applications. Follow proper timing procedures and replace related timing components when the system shows wear. Use the supplied torque-to-yield attachment bolts and valving bolts during installation.

Quality Assurance

Cloyes tests and measures this VVT sprocket for function, fitment, and durability before release. The brand states that this product line is backed by an industry-leading warranty and technical support.