Recently did a tune up, curious on feedback.
The car info: 05' GTP, 57k/miles, family car. second owner, unknown maint. and service history so I decided to start a baseline.
Oil change: mobil-1 10w30, fram filter. old oil looked decent, no sludge and it was almost transparent so I think it was changed regularly. peak inside valve cover showed no obvious sludge build up.
Supercharger oil change: used 2 of GM's recommended oil, (it doesn't smell that bad) old oil was dark, but I did not keep track of exactly how much came out, I filled to the threads so that it just barely was leaking out. I think that the level was low.
K&N drop in filter, oiled.
NGK plugs, stock heat range.
new thermostat, stock 195.
complete drain and flush of coolant system with 50/50 dexcool. old coolant seemed a bit sludgy from the motor, but clear in the radiator. I live in Louisiana and I think that the local service shops put tap water in the car, and it is very hard water that leaves stains in our sinks and toilets, so i think that may have contributed.
Rotate tires, has bf goodrich rubber on it that still has little nubbies on the sidewalls and tons of tread.
brake pads are about halfway through all around.
swapped out some power steering fluid, mostly to see the condition of the fluid for any sludge or burned odors etc. fluid was murky but otherwise normal.
transmission fluid and filter done by service shop, used ac delco atf and filter at dealer.
PCV replaced, cleaned throttle body.
serpentine belt replaced.
The battery looks original, i was thinking about just getting one in a week or so, just for the heck of it.
Anything else I could do? do better? I hear that 05' started putting an integrated fuel filter and pump unit, expensive and a ***** to replace I bet.
anything I can do to prolong the life of my supercharger? any servicing that can be done yourself? is there a better oil to use than the GM? I hear people's stories about blower failure after 100k/miles.
How about my tranny, do these vehicles come with any sort of trans cooler, or is it in the radiator like some vehicles? is there a company that makes a tranny cooler kit that is specific without any cutting or bending hoses and things to leak? I would like a heavy duty trans cooler to prolong my tranny life. I remember that police issue vehicles have heavy duty external coolers, like the older caprices with LT1's, they had a large cooler and all the hoses were goodyear high miler, I would like to use the high miler hoses on my vehicle when it comes time, they last forever.
I appreciate any feedback and pointers!
There are a couple items you could do, if you want. 
Originally Posted by projectxxxmayhem
I’m just glad to see like minded people out there, it never ceases to amaze me how many people never change their tranny fluid until they have noticeable problems. And then rush out and change their tranny fluid thinking it will fix the damage.
Story time now, I was talking car stuff at work. And this guy told me I was wasting my money changing tranny fluid, because he never has. I was like ya, if I could afford a new car every two years I wouldn’t either! I told him for the cost of one tranny replacement, you can do a life time of fluid changes. Some people’s kids.
