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Chevrolet's GEN III and GEN IV 'LS' engines can be identified by their RPO code. You can determine the RPO code if you have the Vehicle Identification Number (VIN #) from the original/donor vehicle.
WHICH "LS" ENGINE DO I HAVE
Not sure what components you have? Click this link for the component ID guide
Click here for the injector Part Number Guide
- Locate the 8th digit of the VIN.
- Check the tables below to identify your engine.
*Click on the RPO code
below 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 / VORTEC 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 / VORTEC 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 | ||