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yes, my 2000 grand prix gtp is losing power and makes ticking noise.
Most likely the ticking you are hearing is that from your solonoid. This is generally related with insufficient power from the battery.
Oil slow getting to the head
possibly you need a better grade of gas?
Sounds to me like HOT exhaust cooling down.
The cool water hitting your piping hot exhaust makes the metal contract (Shrink) and it makes a ticking noise.
The problem with the wording in "Startled by the noise, the alarm clock was knocked on the floor" is that it makes it sound like the alarm clock was startled. It would be better written: "Startled by the alarm clock, I knocked it on the floor."
It could be a sticking hydraulic lifter or valves that are slightly out of adjustment.
The ticking noise could be worn out rocker arms under valve covers. Switch to heavier weight oil if ticking noise subsides that could be your problem. This is usually a sign of a high mileage engine. Worst case scenario would be weak oil pump not getting oil to top of heads.
the ticking noise is a small exhaust leak close to the exhaust headers or exhaust pipe near the engine.
If you hear it only at idle and sounds faint, it is your rocker shaft. They wear on the end and makes a slight ticking noise. Mine has done it for over 100k miles and no problems. I hope you have done reg maint and kept oil changed.
Take it to a mechanic