The firing order for GM’s 6.2L V8s in the LS family is 1-8-7-2-6-5-4-3.
This article explains what that sequence means, how the cylinders are numbered, and what to check if you’re servicing a 6.2L V8 in GM vehicles such as the Corvette, Camaro, or Silverado/Sierra. The 6.2L is used across several models, and the standard LS-based firing order remains consistent across most versions and model years, including naturally aspirated and supercharged variants. When dealing with non-GM 6.2L V8s, always verify the exact firing order in the respective service manual.
GM 6.2L V8 firing order
Before listing the sequence, note that the following order reflects the standard LS-family firing order used in Chevrolet’s 6.2L engines (for example, LS3, LT1, LT4). It indicates the ignition sequence from first to last in each engine cycle.
- Cylinder 1
- Cylinder 8
- Cylinder 7
- Cylinder 2
- Cylinder 6
- Cylinder 5
- Cylinder 4
- Cylinder 3
Conclusion: This is the typical firing order for GM’s 6.2L V8 LS-based engines, used across popular performance cars and trucks. Always confirm against your exact engine code or model year from the official service manual if you are performing ignition work.
Cylinder numbering convention
On GM LS engines, cylinders are numbered 1 through 8 with odd numbers on one bank and even numbers on the opposite bank. The front of the engine houses cylinders 1 and 2, and the numbering continues toward the rear along each bank (1-3-5-7 on one side; 2-4-6-8 on the other).
Variants and cross-brand considerations
While GM’s 6.2L LS-based engines share the same firing order, there are variants (such as supercharged versions or different model years) where wiring or component placement might lead to confusion if a technician references an alternate diagram. For any non-GM 6.2L V8, or if you’re unsure about your engine’s exact configuration, consult the specific manufacturer’s service manual or ignition wiring diagram.
Summary: For GM’s 6.2 L LS-family V8s, the standard firing order is 1-8-7-2-6-5-4-3. Use this sequence when connecting ignition coils or spark plug wires, and always verify against your engine’s exact model and year.