Thread: Where to start, upgrading GTP

A few months ago I purchased my 2002 Grand Prix GTP. 153k miles. Black/2dr/fully loaded. I love it, exactly what I was looking for! It had an exhaust leak when I bought it but I got it fixed right away. Replaced the one fog light that was out, now I iust am missing a side skirt I'm just waiting on it to warm up before I fix that. I'm just wondering when I get to start doing upgrades to my car what exactly should I be starting with? Exhaust? Pulley? Cold air intake? I'm not an expert but I do love cars, love learning new things about my car and that's why I'm here. Anybody got any ideas on where I need to start?

Yes. this question has been asked many many times. the SEARCH bar at the top to the left of the 2 cars will have all the info you need

Well appreciated, sorry for wasting a thread

http://www.grandprixforums.net/threa...00-Powered-Car!!

Basic info about them is that they are a GM W-Body, Coupe/Sedan, FWD, 4-spd automatic transmission (Code-Named the 4T65E-HD; 2.93 gearing) 3800 Supercharged V6 platform (Code-named L67 for 97-03 or L32 '04+), rated at 240 hp (260 horse for the '04+ cars)and 280 ft. lbs. of torque from the factory. Figure your 20%-ish drive train loss and you’ve got your basic wheel horsepower numbers. The N/A Grand Prix was also powered by the 3800 V6 (Code-Named L36 for 97-03 or L26 '04+) and mated to a 4-spd automatic transmission (Code-Named 4T65E; 3.29 gearing, Keep in mind in '04 The GTP Comp G used 3.29 gearing from the factory for a way better setup) making 200 hp and 225 (add 5 ft. lbs. for the '04+ cars) ft. lbs. of torque. If you have just bought your ’97-’08 WBody and are looking to modify it then please take these steps to insure safer modding steps. Begin with your typical maintenance first, such as:
1) New Spark Plugs (You can upgrade spark plugs at this time if you wish)
2) New Spark Plug Wires (You can upgrade spark plug wires at this time if you wish)
3) Oil/Oil Filter Change
4) Fuel Filter Change
5) Coolant System Flush (Replace Dexcool with Yellow/Green Coolant)
6) New Thermostat (You can upgrade to a 180*/160* Thermostat at this time if you wish)
7) Lower Intake Manifold Gaskets/Coolant Elbows (2)
8) Transmission Pan Drop/New GM Transmission Filter (Replace 3-4 quarts with Dexron VI, not Dexron IV)
9) New Brake Pads and/or Rotors
10) Supercharger Oil Change (Replace with 2 New Bottles of GM Supercharger Oil)

Originally Posted by 99GT2dr

My favorite is #5 on the list.

lol

I really appreciate all of this very much. This is EXACTLY what I wanted to here and I love learning these things about my GTP. Can't wait to get a jump on it starting with that list of maintance work. I will focus on all 10 of these steps before moving on to any additional upgrades.

Actually I was going to get my transmission flushed recently and someone told me not to because I don't know when the last time it has been done and they have heard that sometimes putting brand new fluid in the transmission that hasn't been changed in a very long time can start causing problems. Hopefully that made sense.. Anybody know anything about this?

I might be a bit biased.....but.......
http://www.grandprixforums.net/threa...s-98-02-GT-GTP

Awesome thanks! Love seeing and learning all these great things about my GTP. Really a great help!

Tomorrow I will be beginning the maintance starting with buying NGK spark plugs and also some aftermarket wires. Any ideas on what wires to get? Does it really matter?

Originally Posted by Scottydoggs

cheap parts store brand wires do just fine. get a set with a lifetime warranty. make sure you get iridium plugs too.

so I'm guessing my local autozone or orileys will have these. So I should get NGK plugs but the iridium kind? With all honesty idk what iridium means but I'm here to learn.