2006 chevy silverado engine,

[Tommy Newman]

The 8th letter in the VIN is X. I can't find anywhere that let's me know what motor I have. Just bought it and need to know. Anyhelp would be appreciated...

[Jworks]

On my GMC Sierra the engine size is shown on a label on the air intake box where the air filter is.  If the label is not there on your truck maybe this will help:     https://en.wikibooks.org/wiki/Vehicle_Identification_Numbers_(VIN_codes)/GM/VIN_Codes#American_engine_codes_1981-

 

But, according to this its a 4.3 V6 engine.  According to this, its a V6, which is a 4.3 engine.  https://www.youcanic.com/chevrolet-vin-decoder/

Edited September 25, 2023 by Jworks

[newdude]

1 hour ago, Tommy Newman said:

The 8th letter in the VIN is X. I can't find anywhere that let's me know what motor I have. Just bought it and need to know. Anyhelp would be appreciated...

 

 

X = Vortec 4.3 V6.  RPO code LU3.  

[richard wysong]

Welcome to the Forum Tom!