300UGUY
Super Member
I just purchased a 2013 Cadillac XTS Premium. I have always did all the light service work, rotate tires, oil - filter change, spark plugs, serpentine belts, etc on vehicle I own in the garage. I raised the hood on the car and got one of those uh-o moments. The rear spark plugs are somewhere back there. I have been unable to see or determine how one would change the plugs short of doing as some have mention of removing or partially removing the engine. The oil filter on the front of the engine I am still debating on how to remove. The oil drain plug is in an almost impossible place to reach. If a headlight bulb ever needs replacing I guess the front of the car will have to be removed. I have a friend who owns/operates a large garage. I called him and he laughed and advised his system would be up-graded-dated shortly to include the 2013 shop manuals. I am seriously thinking of stopping by and spend a day on his shop computer to determine the recommended way to do the light service work I have in the past been able to do.
It's pretty common to remove the inner fender to get at the lights. As for the engine, plugs only get replaced at 100K or more. No wires, the spark plug boots are built into the valve cover. As is the ECM. The newer GM engines were designed to run 300K or more.