Walker 590-1406 Engine Variable Valve Timing (VVT) Solenoid

OE Replacement VVT Solenoid

Walker 590-1406 is an engine variable valve timing solenoid built to restore camshaft control in modern GM applications. It regulates pressurized oil flow to the cam phaser or VVT sprocket, helping the engine adjust valve timing based on load and speed. Compatible With 2019 Cadillac CT6, 2020-2021 Cadillac CT4, 2020-2021 Cadillac CT5, 2019-2021 Cadillac XT4, 2020-2021 Cadillac XT5, 2021 Cadillac XT6, 2020-2021 Chevrolet Blazer, 2020-2021 GMC Acadia, and 2021 Buick Envision, Variable Cam Timing.

• OE replacement VVT solenoid for variable cam timing systems
• Heat-resistant plastic housing with oil-sealed connector
• Precision-machined internal valve for controlled oil flow
• Black oblong female connector with blade terminals
• 2 mounting holes, 2 terminals, and included seal
• Walker 590-1406 engineered for exact OE fit and electrical response

How It Works

This solenoid opens and closes oil passages to change cam timing in real time, which helps maintain throttle response, fuel efficiency, and emissions performance. Walker 590-1406 is built to meet or exceed OE specifications for electrical response, oil flow control, and pressure regulation. It is a direct-fit replacement for vehicles such as the Cadillac XT4, Chevrolet Blazer, and GMC Acadia with variable cam timing.

Common Symptoms It Can Address

• Check engine lights with VVT-related fault codes such as P0010-P0014 or P0020-P0024
• Rough idle or unstable engine operation
• Hesitation during acceleration
• Reduced power or sluggish throttle response
• Timing control issues caused by a sticking or electrically failed solenoid

Installation Notes

Use factory wiring and mounting points for installation. Verify connector style, terminal layout, and seal condition before replacement. Because VVT operation depends on clean oil passages, inspect the engine oil and related passages if the original solenoid was clogged or stuck. Walker 590-1406 is a direct OE-style replacement for the listed Cadillac, Chevrolet, GMC, and Buick applications.

Quality Assurance

Walker Products manufactures this VVT solenoid to OE replacement standards with heat-resistant materials, precision internal components, and sealed electrical connections for long-term engine operation. Part number 590-1406 is built for factory-level fit and function in the listed applications.