The most common scheme:
* Passenger side (right): Cylinders 1, 3, 5
* Driver's side (left): Cylinders 2, 4, 6
The numbering usually starts at the front of the engine (closest to the radiator) on the passenger side (cylinder #1) and then alternates between sides, moving towards the rear of the engine.
To be certain:
* Consult your owner's manual: This will have a diagram showing the precise cylinder numbering for your specific Chevy V6 engine.
* Look for casting numbers on the engine block: These numbers can help identify the engine family, which can then be used to find a diagram online.
* Use online resources: Websites dedicated to automotive repair and specific Chevy engine models will often have diagrams. Searching for "[your Chevy V6 engine code] cylinder numbering" will likely yield results.
Without knowing the specific year, model, and engine code of your Chevy V6, it's impossible to give a definitive answer. Always rely on the vehicle's documentation or verified online resources for accurate cylinder numbering.