* 4.8L Vortec V8: This engine produced approximately 300 lb-ft of torque.
* 5.3L Vortec V8: This engine produced approximately 325 lb-ft of torque.
To find out which engine is in *your* 2003 Chevrolet Tahoe, check the vehicle's documentation (owner's manual) or the sticker located on the driver's side doorjamb. The engine displacement (4.8L or 5.3L) will be clearly stated.