How and where do I change spark plugs on a 2001 Cadillac Deville?

Answer 1

OMG, a Homer Simpson! Try looking under the "Plug Leads" and make sure you have a "Plug Spanner" LOL Funny enough, spark plugs are hidden under the plug leads on all cars. Those damn engineers! You should write to them and ask them to stop hiding the plugs.

Answer 2

. If that 8 cyl. motor is like my big-azz Buick, the plugs are under the motor 'shield'. Remove that and trace the 8 wires. 4 go to the back where you can't even see the plugs!
Get a small mirror and a big flashlight, a proper spark plug socket, [maybe a 18mm deep socket or 5/8ths inch ] and a foot-long 'breaker bar' to put on the end of your 1/2 inch ratchet. BUT before you take any plugs out, blow the greasy dirt away from the plug holes.
Then if you manage to remove a plug without breaking it off inside the motor, or snapping off the wires, gosh, you're halfway home. NO problemo, huh?
Then when you put in the proper replacement, try not to strip the threads or crossthread 'em. And use a bit of anti-seize on the threads.
... er, You'd better get a Repair manual. .