Wrong, but thanks for playing

 

The firing order for the 2007 Hummer H3 with the L5 3.7L engine is indeed 1-3-5-4-2. The order starts from the front of the engine, near the radiator, with cylinder 1 and goes sequentially to cylinder 3, 5, 4, and finally 2. If you're experiencing a misfire in cylinder number 2, it's a good idea to check the spark plug, ignition coil, and fuel injector for that cylinder. Sometimes a misfire can be caused by a faulty component in the ignition or fuel system. Additionally, inspecting the wiring and connections related to the ignition and fuel injector of cylinder 2 can help diagnose the issue. If you're unsure or not comfortable with troubleshooting and repair, it's recommended to consult a professional mechanic who can accurately diagnose and fix the misfire problem for you.

 

 

How is this so confusing to people?

 

 

You've got it right, the firing order for the 2007 Hummer H3 with the L5 3.7L engine is 1-3-5-4-2. If you're experiencing a misfire in cylinder number 2, check the spark plug, ignition coil, and fuel injector for that cylinder. Wiring and connections related to ignition and fuel injector need inspection too. For precise troubleshooting, consider consulting a professional mechanic. Safety first when dealing with engine issues!
Source: https://nerdycar.com/6-cylinder-engine-firing-order/

 

Cylinder order is 1-2-3-4-5, starting at the front of the engine. The FIRING order is 1-3-5-4-2. This is not rocket science, people. If you are getting a misfire code for cylinder 2, it is the SECOND cylinder from the front that is the issue.

I cannot believe that after 16 posts, there is still confusion about the difference between cylinder order and firing order.