LR4 4.8L engine: specs, donor vehicles & swap notes
| Spec | Value |
|---|---|
| RPO | LR4 |
| Family | Generation III |
| Years | 1999–2007 |
| Displacement | 4.8 L / 293 ci |
| Horsepower | 255–285 hp |
| Torque | 285–295 lb-ft |
| Bore × stroke | 3.78 × 3.268 in |
| Compression | 9.45:1 |
| Block | iron |
| AFM/DOD | No |
| VIN 8th digit | V |
Iron/Alum. heads
Specs from secondary sources; GM ratings varied by year and vehicle.
Donor vehicles with the LR4
Where to find one at the junkyard. Confirm with the RPO sticker in the glovebox or the 8th VIN digit.
| Vehicle | Years |
|---|---|
| Chevrolet Express/GMC Savana 2500/3500 | 2003–2007 |
| Chevrolet Silverado/GMC Sierra 1500 | 1999–2007 |
| Chevrolet Tahoe/GMC Yukon | 2000–2006 |
Next steps
- Find a cam for the LR4
- Compare every LS donor engine
- Size injectors and fuel pump
- Swap guides by vehicle
Sources