Cadillac Repair: 1997 Cadillac DeVille, cadillac deville, repair manuals

Question
Is it possible to remove bothe cylinder heads with engne in the vehicle, all repair manuals tell you to reome engien why

Answer
No this is not possible unless you have 20 years experience with northstar motors, and theyve only been out for 12, so i would say no, theres not enough clearance in the engine bay to get all the components out and then the cylinder heads on top of that, What are you going to do with the motor once the heads are off if its in the car?