LS firing order (5.3, 6.0, LS1, LS3) and cylinder numbers
The GM LS V8 (4.8, 5.3, 5.7 LS1, 6.0, 6.2 LS3) fires 1-8-7-2-6-5-4-3. Cylinder 1 is the front cylinder on the driver side (bank 1, left bank).
Drag to turn the engine, scroll or pinch to zoom. Orange = the cylinder firing now; the numbers on the coils are cylinder numbers. Driver and passenger sides are for left-hand-drive vehicles.
Firing order diagram
Where each cylinder is
| Cylinder | Misfire code | Location | Place in firing order |
|---|---|---|---|
| 1 | P0301 | The front cylinder on the driver side (bank 1, left bank) | 1st |
| 2 | P0302 | The front cylinder on the passenger side (bank 2, right bank) | 4th |
| 3 | P0303 | The second cylinder from the front on the driver side (bank 1, left bank) | 8th |
| 4 | P0304 | The second cylinder from the front on the passenger side (bank 2, right bank) | 7th |
| 5 | P0305 | The third cylinder from the front on the driver side (bank 1, left bank) | 6th |
| 6 | P0306 | The third cylinder from the front on the passenger side (bank 2, right bank) | 5th |
| 7 | P0307 | The rear cylinder on the driver side (bank 1, left bank) | 3rd |
| 8 | P0308 | The rear cylinder on the passenger side (bank 2, right bank) | 2nd |
Bank 1 is always the bank that contains cylinder 1, so for this engine bank 1 is the left bank with cylinders 1-3-5-7; bank 2 is the right bank with cylinders 2-4-6-8. Oxygen-sensor, camshaft and catalyst codes that name bank 1 or bank 2 use the same split.
Coils, plugs and wires
- One ignition coil per cylinder, fired by the engine computer; there is no distributor, so the firing order matters for reading misfire codes and wiring coils to the right cylinders.
How to find a cylinder on this engine
- Find the front of the engine: the end with the drive belt and pulleys.
- Find bank 1, the left bank that holds cylinder 1. On this engine it is the driver side.
- Count from the belt end. Cylinders 1-3-5-7 run along bank 1 and 2-4-6-8 along bank 2, each starting at the belt end.
- Match the code: P0301 is cylinder 1, P0302 cylinder 2, and so on. P0300 means a random or multiple misfire and does not name a cylinder.
Which engines this covers
GM Gen III and Gen IV small-block V8s (the LS family): 4.8, 5.3 and 6.0 Vortec truck engines, the 5.7 LS1/LS6 and the 6.2 LS3, in longitudinal (truck and rear-drive car) installations.
- Chevrolet Silverado / GMC Sierra 1500 4.8 and 5.3 (2005 5.3 verified)
- Tahoe, Suburban, Yukon 5.3 and 6.0
- Camaro, Corvette, GTO and swaps with LS1/LS3
Questions
What is the GM LS (5.3, 6.0, LS1, LS3) firing order?
1-8-7-2-6-5-4-3.
Which side is cylinder 1 on?
Cylinder 1 is the front cylinder on the driver side (bank 1, left bank).
Where is cylinder 4 (code P0304)?
Cylinder 4 is the second cylinder from the front on the passenger side (bank 2, right bank).
Which bank is bank 1?
The bank with cylinder 1: the left bank, cylinders 1-3-5-7.
Why is the LS firing order different from the old small-block?
GM changed the camshaft so that the LS fires 1-8-7-2-6-5-4-3 instead of 1-8-4-3-6-5-7-2. Cylinders 4 and 7, and 3 and 2, swap places in the sequence. The cylinder numbering on the block did not change. Compare the Chevy 350 page.
Sources
The firing order, the cylinder numbering and the position of each bank in the vehicle were each checked against at least two of these sources, and they agree.
- GM service manual, 2005 Chevrolet Silverado 1500 5.3L, Firing Order specification (via Operation CHARM). “Firing Order 1-8-7-2-6-5-4-3” Factory / manufacturer
- GM service manual, 2005 Chevrolet Silverado 1500 5.3L, Number One Cylinder: Locations diagram (via Operation CHARM). “Diagram: front of vehicle at the bottom; 1-3-5-7 on the driver side, 2-4-6-8 on the passenger side, No. 1 front driver side.” Factory / manufacturer
- GM service manual, 2007 Chevrolet 5.3L, Number One Cylinder: Locations (via Operation CHARM). “Cylinders 1, 3, 5 and 7 are Left Bank. Cylinders 2, 4, 6 and 8 are Right Bank.” Factory / manufacturer
- Chevrolet Performance, LS3 crate engine installation guide P/N 19420381 (specifications). “Firing Order: 1-8-7-2-6-5-4-3” Factory / manufacturer
- Engine-build.com, GM LS V8 firing order. “Firing order: 1-8-7-2-6-5-4-3. Cylinder numbering: Left bank 1-3-5-7. Coil-per-cylinder on every Gen III/IV; no distributor.” Independent reference
- ChevyGeek, LS firing order and cylinder numbers. “On the driver's side, we have the 1-3-5-7 cylinders. Cylinder #1 is the closest to you ... On the passenger side, we have the 2-4-6-8 cylinders.” Independent reference
Last reviewed 15 November 2026 · How the data is sourced and checked