Did the following to my brother'* car (03 GP GT) in six hours Friday night (with some of his help - he mainly cleaned since he'* not much of a car guy):

Plug wires
Spark plugs
O2 sensor
thermostat
LIM gaskets
UIM
UIM gasket
flushed coolant
changed tranny fluid
oil change
oil filter change
fuel filter
air filter
PCV
both coolant by-pass elbows
fuel injector o-rings
cleaned throttle body
new serpentine belt
new upper and lower radiator hoses

I was pretty impressed. Typically, I stretch this amount of work out over a weekend on my cars. Since I had another set of hands AND since he needed the car the next day, it was a good motivating factor!!!

The LIM gaskets were shot. I couldn't tell if they were original or not, but nasty nonetheless. 123,000 miles had taken their toll (if they were original).

i took a weekend and then managed to break my fuel rail..which nobody seems to have around here. Since I am going to have to wait on delviery anyhow, any suggestions for a mail order part company? GM Parts direct?

That'll cost you plenty.

Try ebay or www.car-part.com

Even the wreckers will ship. Make sure it'* an L36 rail out of an H body. There are differences from body to body sometimes (for instance, the L67 in the Riv is different than the Bville).

Wow nice work Mark.
Will be doing the same on the 04 GP GT2 we picked up minus the intakes. Its a series III.
What did you put in her for coolant? was he running the Dex thus the ruined gaskets?

Wow, that'* a lot of work in 6 hours, nice job! Like my dad said, we'll be doing some of this stuff on my Grand Prix in the near future. It'* an 04 with 72k miles, so some of this stuff is due. I need to flush the coolant and tranny fluid.

Some people are morons...the guy I bought the car from had the intake piping on all bass-ackwards. Maybe his mechanic did it, who knows. I know he had a WeaponR intake on it before, which he also gave me. I am glad I don't bring my car to a shop.

We refilled the system with the Prestone "all makes and models" coolant.

I was very surprised to see how much transmission fluid came out of the pan, too. We replaced 7.75 quarts.