Cylinder Numbers Chevrolet Impala 3.5L 2006-2016 Location

In this video, I show you the exact cylinder numbers, firing order, and cylinder location layout on a 2006-2016 Chevrolet Impala equipped with the 3.5L V6 engine.

Knowing exactly how the cylinders are numbered on the engine block will save you time, prevent confusion, and ensure you pull the correct ignition coil or spark plug when troubleshooting an engine misfire.

Cylinder Layout and Numbering System

The GM 3.5L V6 engine (transversely mounted for front-wheel drive) numbers its cylinders from the front of the engine (passenger side/accessory belt side) to the rear (driver side/transmission side).

When you stand in front of the vehicle looking at the engine bay:

• Rear Bank (closest to the windshield/firewall): Cylinders 1 – 3 – 5 (from passenger side to driver side)
• Front Bank (closest to the radiator/grille): Cylinders 2 – 4 – 6 (from passenger side to driver side)

Common Symptoms and Reasons for Knowing Your Cylinder Numbers:

• The check engine light is flashing, and an OBD-II scanner reveals a specific cylinder misfire code (such as P0301 for Cylinder 1, P0303 for Cylinder 3, etc.)
• Tracking down a faulty fuel injector, bad spark plug, or failed ignition coil boot on a specific cylinder
• Replacing the upper or lower intake manifold gaskets and ensuring the correct spark plug wires match their designated coil towers
• Performing a targeted compression test or cylinder leakage test on an individual cylinder exhibiting low power
• Eliminating rough engine idling, stumbling, or hesitation by correctly identifying and replacing worn ignition components

Safety First

Always prioritize safety before starting your diagnostic or repair. Make sure the vehicle is safely parked on a flat, level surface, the emergency brake is securely engaged, and the ignition is turned completely off with the keys removed. Allow the engine compartment plenty of time to cool down fully to avoid painful burns from hot exhaust manifolds or cylinder heads. If you are replacing ignition components or disconnecting electrical harnesses, consider disconnecting the negative battery terminal to prevent accidental electrical shorts. Protect your eyes and hands by wearing safety glasses and durable work gloves, and maintain your full focus throughout the task.

Need Help? Ask an Expert

I am an experienced mechanic, and I am here to help you guide your vehicle projects to a successful finish. If you hit a snag trying to reach the stubborn spark plugs on the rear bank against the firewall, aren’t sure how to trace a misfire code to a specific cylinder, or are dealing with a tricky breakdown, leave a message in the comments below. Let me know what you are running into, and I will help you solve your car’s problem!