Dorman 917-255 VVT sprocket for the 2002-2004 Chevrolet Trailblazer 6-cylinder 4.2L and other vehicles replaces a worn factory sprocket in the engine's variable valve timing system. Sometimes listed as an engine variable valve timing sprocket, it is key to engine performance and clean running.
- Steel construction, precision machined for reliable performance
- Part of the Dorman OE Solutions line
- Brand-new sprocket
- Application-specific validation testing to confirm quality
- Supplied with an M10 X 1.5 camshaft bolt
Quick facts
- Part: Dorman 917-255 VVT sprocket
- Also called: engine variable valve timing sprocket
- Fits: 2002-2004 Chevrolet Trailblazer 6-cylinder 4.2L and other vehicles
- Material: Steel
- Condition: New
Lost performance, rough running or a check engine light can mean a worn sprocket, though these signs alone do not prove it is the problem; a faulty oil control solenoid is another common cause.
Fits
It is listed for a wide range of models from Chevrolet, GMC, Buick, Isuzu and Oldsmobile, including the 2002-2004 Chevrolet Trailblazer EXT 6-cylinder 4.2L and the 2002-2004 GMC Envoy 6-cylinder 4.2L, and each takes one. It is designed to install and perform like the original sprocket. If your vehicle is not named here, look it up in the "Vehicles it fits" section to see whether it is listed.
Specifications
Fit and size
- Quantity per vehicle: 1
- Overall length: 2.73 in
- Overall height: 5.8 in
Build and materials
- Material: Steel
- Finish: zinc-plated
- Grade: Standard replacement
- Condition: New
- Country of origin: China
In the box
One VVT sprocket with an M10 X 1.5 camshaft bolt.
Interchange: 7V-1001P · AL-110
VV5031 · 2958 · 19179010 · SK917255 · CSP1015 · VVT531
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
VV5031, 7V-1001P, 2958, 19179010, AL-110, SK917255, CSP1015, VVT531
Frequently Asked Questions
Does the Dorman 917-255 VVT sprocket fit the 2002-2004 Chevrolet Trailblazer 6-cylinder 4.2L?
Yes. Dorman 917-255 is listed for the 2002-2004 Chevrolet Trailblazer 6-cylinder 4.2L, and each vehicle takes one sprocket.
Does this VVT sprocket come with a camshaft bolt?
Yes. The package contents list an M10 X 1.5 camshaft bolt along with the sprocket.
What is the Dorman 917-255 VVT sprocket made of?
Dorman 917-255 is made of steel with a zinc-plated finish, and it is precision machined.
Can a worn VVT sprocket change how the engine runs?
Yes. The sprocket is key to engine performance and clean running, so a worn one may show up as lost performance, rough running or a check engine light.
Is VVT531 the same sprocket as Dorman 917-255?
Yes. VVT531 is listed as an interchange number for Dorman 917-255, so the two numbers cross-reference to this sprocket.
