* 4.8L V8: Approximately 295 horsepower
* 5.3L V8: Approximately 320 horsepower
* 6.0L V8: Approximately 365 horsepower (This was likely in the Denali trim)
To know the exact horsepower of a specific 2007 GMC Yukon XL, you'd need to check the vehicle's documentation (like the owner's manual or the sticker on the driver's side doorjamb).