L33 5.3L engine: specs, donor vehicles & swap notes
| Spec | Value |
|---|---|
| RPO | L33 |
| Family | Generation III |
| Years | 2005–2007 |
| Displacement | 5.3 L / 325 ci |
| Horsepower | 310 hp |
| Torque | 335 lb-ft |
| Bore × stroke | 3.78 × 3.622 in |
| Compression | 10.00:1 |
| Block | aluminum |
| AFM/DOD | No |
| VIN 8th digit | B |
| Stock cam | Unique cam (not shared): @.050 193° duration,.482 in lift, 116° LSA |
Aluminum, only available on 4WD extended-cab standard-bed trucks
Specs from secondary sources; GM ratings varied by year and vehicle.
Donor vehicles with the L33
Where to find one at the junkyard. Confirm with the RPO sticker in the glovebox or the 8th VIN digit.
| Vehicle | Years |
|---|---|
| Chevrolet Silverado 1500 4WD/GMC Sierra 1500 4WD | 2005–2007 |
Next steps
- Find a cam for the L33
- Compare every LS donor engine
- Size injectors and fuel pump
- Swap guides by vehicle
Questions about the L33
Sources