Walker Products 595-1027 VVT sprocket for the 2002-2004 Chevrolet Trailblazer 6-cylinder 4.2L and other vehicles adjusts camshaft phasing to change valve timing as engine conditions change. Also called an engine variable valve timing sprocket, this OE replacement installs in the factory timing system without modification.
- Internal vanes, seals and locking mechanisms built to withstand oil pressure, heat and contamination
- Gear tooth alignment, oil passage flow and phasing actuation made to specification
- Valve timing varies across engine loads, which influences power, fuel economy and emissions
Quick facts
- Part: Walker Products 595-1027 VVT sprocket
- Also called: engine variable valve timing sprocket
- Fits: 2002-2004 Chevrolet Trailblazer 6-cylinder 4.2L and other vehicles
- Material: Metal
- Condition: New
A VVT sprocket can wear, seize or leak internally. Signs can include a rough idle, a loss of power and fault codes P0010-P0014 or P0020-P0024. A faulty VVT solenoid, low or dirty engine oil or a camshaft position sensor can produce similar signs, so find the cause before buying. If the sprocket is the cause, this one replaces it.
Fits
The listing covers a wide range of Chevrolet, GMC, Buick, Isuzu and Oldsmobile models, such as the 2002-2004 GMC Envoy 6-cylinder 4.2L and the 2002-2004 Chevrolet Trailblazer EXT 6-cylinder 4.2L. If your vehicle isn't named here, look it up in the "Vehicles it fits" section. The engine takes one sprocket.
Specifications
Fit and size
- Engine: L6-4.2L
- Quantity per vehicle: 1
- Tooth quantity: 58
Build and materials
- Material: Metal
- Condition: New
- Country of origin: China
Interchange: 1DEF9010 · 25178506
Frequently Asked Questions
Is this Walker Products 595-1027 VVT sprocket right for the 2002-2004 GMC Envoy 6-cylinder 4.2L?
Yes. The Walker Products 595-1027 VVT sprocket is listed for the 2002-2004 GMC Envoy with the 6-cylinder 4.2L engine. The "Vehicles it fits" section covers the other vehicles.
How many teeth does the Walker 595-1027 VVT sprocket have?
The Walker Products 595-1027 VVT sprocket has 58 teeth and a metal body. It is listed with the L6-4.2L engine.
Which fault codes can come with a worn VVT sprocket?
Codes P0010-P0014 and P0020-P0024 can appear when a VVT sprocket wears, seizes or leaks internally. Other VVT system parts can set them too, so a shop can scan and test the system.
Do I need to modify anything to fit this VVT sprocket?
No. This VVT sprocket is made to go into the factory timing system as is, without modification.
Does 25178506 cross-reference to this Walker VVT sprocket?
Yes. 25178506 is listed as an interchange number for the Walker Products 595-1027 VVT sprocket, along with 1DEF9010.
