My 2004 gran prix (gtp) just hit 100000 miles. What maintenance needs to be done now?

You can find them in a junk yard, or online, at multiple websites. Amazon.com, eBay.com, or most anything like that. Or your local craigslist postings, under car/auto parts for sale.

Below is the diagram you requested. Best of luck and thank you for using Fixya!
Greg

2004 Pontiac Gran Prix 3.8L

The only thing is to change oil, It takes a special oil, your GM dealer should have it. Or google it.

Hi,
Technically you are looking more at a 90,00 mile check but here it is regardless - this is what you need to do:90,000mi
Replace: Engine Oil & Filter.
Air Cleaner Filter.
Spark Plugs (Platinum Coated).
Engine Coolant.
Inspect: Automatic Trans axle Fluid.
Brake hoses * Lines.
Brake pads, Calipers, and Rotors.
Exhaust Pipe and Muffler.
Suspension Mounting Bolts.
Steering Gear Box, Linkage & Boots/Lower Arm Ball Joint.
Power steering Pump,
Belt & Hoses.
A/C Refrigerant.
Cabin Air Filter
Drive Belt (water pump, alternator and a/con). Timing Belt.
Manual Trans axle Oil.
Brake Fluid.
Drive shafts and Boots.
Vapor Hose and Fuel Filler Cap. Fuel Lines, Fuel Hoses, and Connections.

Long list there eh?

Hope this helps please rate hi if it does.

You may have a jacked up wire... or plug...this happen to me on my 2004 grand prix gtp 2 times...1 time one of my plugs was cracked the 2nd time my plug wire was laying on dip stick and started to melt....each time after replacing the plug and the wire it stopped misfiring...

yes, behind the speedometer / odometer is a small bulb. replace it and it will fix your heads up display

If you had the 90,000 mile service done, and was performed to the service maintenance guide, not much is needed at 100K mils; oil change and tire rottion; replace the air filter.

change the fluid and clean filter every 15000miles, oil change is every 3000 miles and tuneups are usually every 100000 miles. air filter is done every 30000 miles.
feul filter every 30000 miles as well.

Replace fuel filter every 30k miles. Its near fuel tank.