MarineEngine.com 184 Jones Drive Brandon, VT 05733 USA (800) 209-9624 (802) 247-4700 (802) 419-3055 Fax. A Chevrolet VIN decoder that allows you to lookup options, model, year, engine, transmission, and specifications. HOW TO DECODE CHEVROLET VIN. Let's break down a Chevrolet VIN number and explain what each of the positions means.
Chevrolet's 3rd and 4th generation small block engines are generally known by their RPO code. You can determine the RPO code if you have the Vehicle Identification Number (VIN) from the original vehicle.
- Locate the 8th digit of the VIN.
- Consult the tables below to identify your engine.
Notes
- The information below applies to vehicles with the original engine still installed.
- If you have a second-hand vehicle that doesn't match the info below, the engine may have been swapped out.
- Follow this link for help Identifying an LS Engine by Inspection.
- Click on the RPO code in the table to see more details about that engine.
| Gen. 3, LS Car Engines |
| 8th Digit of VIN | RPO Code | Disp. | Common Name |
| G | LS1 | 5.7L | LS1 |
| S | LS6 | LS6 |
| Gen. 3, LS Truck Engines |
| 8th Digit of VIN | RPO Code | Disp. | Common Name |
| Iron Block |
| V | LR4 | 4.8L | Vortec 4800 |
| T | LM7 | 5.3L | Vortec 5300 |
| Z | L59 |
| U | LQ4 | 6.0L | Vortec 6000 |
| N | LQ9 | Vortec HO 6000 or VortecMax |
| Aluminum Block |
| P | LM4 | 5.3L | Vortec 5300 |
| B | L33 | Vortec 5300 H.O. |
Gm Engine Serial Number Lookup
| Gen. 4, LS Car Engines |
| 8th Digit of VIN | RPO Code | Disp. | Common Name (Notes) |
| C | LS4 | 5.3L | LS4 (FWD only) |
| U | LS2 | 6.0L | LS2 |
| Y | L76 | L76 |
| 2 | L77 | L77 |
| W | LS3 | 6.2L | LS3 |
| J | L99 | L99 |
| P | LSA | LSA (supercharged) |
| T | LS9 | LS9 (supercharged) |
| E | LS7 | 7.0L | LS7 |
| Gen. 4, LS Truck Engines |
| 8th Digit of VIN | RPO Code | Disp. | Common Name |
| Iron Block |
| C | LY2 | 4.8L | Vortec 4800 |
| A | L20 |
| J | LY5 | 5.3L | Vortec 5300 |
| 0 | LMG |
| 4 | LMF |
| K | LY6 | 6.0L | Vortec 6000 |
| G | L96 |
| Aluminum Block |
| M | LH6 | 5.3L | Vortec 5300 |
| 3 or 7 | LC9 |
| L | LH8 |
| P | LH9 |
| H | LS2 | 6.0L | LS2 |
| Y | L76 | Vortec Max |
| 5 | LFA | Vortec 6000 (hybrid) |
| J | LZ1 |
| 8 | L92 | 6.2L | Vortec 6200 |
| 2 | L9H |
| F | L94 |
Chevrolet's 3rd and 4th generation small block engines are generally known by their RPO code. You can determine the RPO code if you have the Vehicle Identification Number (VIN) from the original vehicle.
- Locate the 8th digit of the VIN.
- Consult the tables below to identify your engine.
Stovebolt Chevy Engine Serial Number Lookup
Notes
- The information below applies to vehicles with the original engine still installed.
- If you have a second-hand vehicle that doesn't match the info below, the engine may have been swapped out.
- Follow this link for help Identifying an LS Engine by Inspection.
- Click on the RPO code in the table to see more details about that engine.
| Gen. 3, LS Car Engines |
| 8th Digit of VIN | RPO Code | Disp. | Common Name |
| G | LS1 | 5.7L | LS1 |
| S | LS6 | LS6 |
| Gen. 3, LS Truck Engines |
| 8th Digit of VIN | RPO Code | Disp. | Common Name |
| Iron Block |
| V | LR4 | 4.8L | Vortec 4800 |
| T | LM7 | 5.3L | Vortec 5300 |
| Z | L59 |
| U | LQ4 | 6.0L | Vortec 6000 |
| N | LQ9 | Vortec HO 6000 or VortecMax |
| Aluminum Block |
| P | LM4 | 5.3L | Vortec 5300 |
| B | L33 | Vortec 5300 H.O. |
| Gen. 4, LS Car Engines |
| 8th Digit of VIN | RPO Code | Disp. | Common Name (Notes) |
| C | LS4 | 5.3L | LS4 (FWD only) |
| U | LS2 | 6.0L | LS2 |
| Y | L76 | L76 |
| 2 | L77 | L77 |
| W | LS3 | 6.2L | LS3 |
| J | L99 | L99 |
| P | LSA | LSA (supercharged) |
| T | LS9 | LS9 (supercharged) |
| E | LS7 | 7.0L | LS7 |
| Gen. 4, LS Truck Engines |
| 8th Digit of VIN | RPO Code | Disp. | Common Name |
| Iron Block |
| C | LY2 | 4.8L | Vortec 4800 |
| A | L20 |
| J | LY5 | 5.3L | Vortec 5300 |
| 0 | LMG |
| 4 | LMF |
| K | LY6 | 6.0L | Vortec 6000 |
| G | L96 |
| Aluminum Block |
| M | LH6 | 5.3L | Vortec 5300 |
| 3 or 7 | LC9 |
| L | LH8 |
| P | LH9 |
| H | LS2 | 6.0L | LS2 |
| Y | L76 | Vortec Max |
| 5 | LFA | Vortec 6000 (hybrid) |
| J | LZ1 |
| 8 | L92 | 6.2L | Vortec 6200 |
| 2 | L9H |
| F | L94 |
