How are the cylinders numbered on Chevrolet 2.8 liter engine?

The Chevrolet 2.8L V6 engine (often found in S-10 Blazers and other GM vehicles) uses a front-to-back, driver's side to passenger's side numbering system. Looking at the engine from the front:

* Cylinders 1 and 6 are at the front of the engine on the driver's side. Cylinder 1 is closest to the front.

* Cylinders 2 and 5 are next.

* Cylinders 3 and 4 are at the rear of the engine.

Therefore, the firing order will generally be a variation of 1-6-5-4-3-2. The exact firing order should be checked on your specific engine's documentation or a reliable repair manual as there might be slight variations depending on the year and application.