I believe it is 260 horsepower.
The horsepower of a GMC Sierra is 355 hp.
vortec 454,1996 thru 1999-->>>290HP 410TQ
It has 255 horsepower bone stock
Every vehicle has a different type of horsepower depending on the specifications of the vehicle. The 1999 Tahoe Z71 350 Vortec Engine has a horsepower of 255 at 4600 RPMs.
397 hp
About 190 H.P.
Between 370 and 390
215@2800. Rpm
197 rwh stock
Type your answer here... 255 horsepower and 335 lbs of torque
The 8.1L vortec comes stock with 330 hp and about 450 pound feet of torque.