Why are there so many Grand Prix GXP's for sale

Why is that? There is like 7 or 8 in my area that's for sale. Are they not all that great or what?

Thanks

$4.09/gal for regular, and $4.29 for Premium, that's why!

Yea I guess your right. I have an 05 GTO and gas is getting crazy. Other than the fuel price is the GXP a decent car?

Are they not all that great or what?

Thanks

You answered part of your question.

I have one. It's a 2007. Gas mileage is very good for a car that does 0-60 in the six second bracket. Overall, my gas mileage is about 22.5 mpg. For highway-only driving, 24-26 mpg is what I've experienced.

This GXP replaced a 2000 Bonneville SSEi, which has the same drivetrain as the GTP Grand Prix's '97-'03. The GXP outperforms the supercharged V-6 by A LOT, and consistently gets better mileage.

The 2007 Grand Prix GXP is one of the rarest of all Pontiacs ever produced. They are very different from other Grand Prix models of the same year. The wheels, brakes, front facia and grille, are a few of the differences. The sound is similar to the GTO--and performance is not far off. I have a 2004 GTO, also.

I believe the reason you see so many for sale is related to gas prices. If people knew how good they are for fuel economy, there wouldn't be so many for sale.

Nah! :grinno: With all due respect IMO lackluster performance for the cost and not exactly award winning looks. The stock L67 GTP does a lot better in gas mileage than you claim. :grinyes: The highway figures are much better than that even cruising 70-80 miles per hour all day long on the road. Plus you are limited on mods with the GXP and what the car could be capable of doing. With a '97-'03 GTP or even the '04 and up models with the SIII 3800 supercharged engine mods are not an issue either and needless to say the performance achieved will blow your doors off.

....The GXP outperforms the supercharged V-6 by A LOT, and consistently gets better mileage.

I dont know about this one. I dont doubt that a GXP will outperform a stock GTP, but the GTP gets way better milage than 22 city and 24-26 highway. Where have you been getting your info?

Oops Sorry Bob, we were both thinking the same thing at the same time, HA HA

I had an 00 GTP and it was a very nice car. I think the GXP's look like a cool car, but its like the GTO not alot of people want it and dont think much of it

I don't see how you can compare a GTO to a GXP. No comparison. :grinno: If I was in the market for a new or used car the GTO looks much better to me. But it is nice not having any car related debt. Hard to beat the LS2 engine even though probably not too economical. If I was looking for fuel economy I'd get a Honda. :grinyes:

Also, don't be surprised to find that some of the GXP owners probably traded them in for a gas guzzling SUV.

Another issue is both the GTO and GXP are history although you could say reborn in the new G8 GT which appears to be a good car for the cost, appearance and performance. :thumbsup:

tblake,
The info on gas mileage is from personal experience on my 2000 SSEi Bonneville and my 2007 GXP Grand Prix. The BEST I ever saw on the 2000 Bonneville was 27 mpg on all highway driving--250 mile trip. The BEST I saw on my GXP was 29 mpg on all highway driving--310 mile trip.

As to the comments on performance, most of you acknowledge the V8 GXP outperforms the GTP stock. But, do any of you SERIOUSLY believe the 3800 V6 can be modified to outperform a similarly modified 5.3 V8?

tblake,
The info on gas mileage is from personal experience on my 2000 SSEi Bonneville and my 2007 GXP Grand Prix. The BEST I ever saw on the 2000 Bonneville was 27 mpg on all highway driving--250 mile trip. The BEST I saw on my GXP was 29 mpg on all highway driving--310 mile trip.

Wow, thats not good at all, something had to have been wrong. I can get upwards of 38mpg highway and 26 city 27-28 combined with my GTP, and I'm not feeding you guys BS either. I just drive it nice and keep it maintained.


As to the comments on performance, most of you acknowledge the V8 GXP outperforms the GTP stock. But, do any of you SERIOUSLY believe the 3800 V6 can be modified to outperform a similarly modified 5.3 V8?

No, I think what Bob and the other guys are saying is that there are very few mods available for the 5.3 V8 in the GXP compaired to the 3.8 SC motor. Not to mention that the mods that are available to the 3800 are very cost effective and if done right will outperform a 5.3 V8 GXP even with mods. Have you checked out Bob (bnaylor)'s GTP's timeslip at the track? Lets see a GXP even with mods accomplish that.....

how the hell are you getting 38 mpgs on a 3.8.IT not possibly.

:rolleyes:

I don't see how you can compare a Bonneville SSEI to a GTP. IMO comparing apples to oranges. The GTP was always a faster car in 0-60 mph and 1/4 mile times and had much better fuel economy both real world and EPA. Last time I checked at least a 200 lb difference in curb weight so they are both in different classes.

EPA fuel economy:

2000 Bonneville SSEI: city/hwy 17/25

2000 Grand Prix GTP: city/hwy 18/28

When my GTP was stock I used to get at least 29 mpg highway when I used to travel leisurely between El Paso and Phoenix. Over 450 miles one way. And nothing less than 25 mpg hauling ass.

Also, take note that LS4 engine found in the GXP has the Displacement on Demand (DoD) and beginning 2006 the Active Fuel Management (AFM) systems. Without it the fuel economy would be no better than a gas guzzling SUV or pick up truck with a V8. IMO that is the major obstacle to modding a GXP. Most of the owners of GXPs get no wheres near the mileage what is claimed here if you check out the LS Tech Auto Forums. :grinno:


No, I think what Bob and the other guys are saying is that there are very few mods available for the 5.3 V8 in the GXP compared to the 3.8 SC motor. Not to mention that the mods that are available to the 3800 are very cost effective and if done right will outperform a 5.3 V8 GXP even with mods. Have you checked out Bob (bnaylor)'s GTP's timeslip at the track? Lets see a GXP even with mods accomplish that.....

Thanks Tim. I could not have said it better. :wink:

As far as anecdotal info to include timeslips like at DragTimes there are no GXPs that will meet or exceed my 1/4 mile times and trap speed. Plus there are GTPs both '97-'03 and '04 and up faster than mine. :eek: Not to mention the Intense Racing and ZZP/Stattama Twin Turbo GTs which are 9 sec ET.

We had a guy can't remember his member name that used to participate here that did the 1/4 mile in the low 11s with a '04 GTP Comp G. The mods were impressive. I think he graduated up to a Z06 Corvette but still has the GTP.

how the hell are you getting 38 mpgs on a 3.8.IT not possibly.

I know man, Its definatly wierd. I changed my pulley from stock to 3.5", changed one range colder plugs, and a 180 stat. Have a ZZP stage 1 Throttle Body because my MAF died not too long ago.

After I put the pulley on, plugs in, stat in, I filled with 92 octane and reset my DIC. I then took it on a 10-15 mile highway trip and initially my mpg went up to closer to 40, but it leveled off to 37-38 while I was cruising at 55-60mph. I couldnt believe it myself.

Just saw a commercial on TV about a new focus that boasted 32MPG highway. Thats not good at all for a small focus. Thats what I get every day commuting with an ond GTP. Weird!

Had to add my comment, I own an 08 gxp, she is a beast and would NEVER trade her! That 5.3 had so much power in that build it is unreal and yes it beats the supercharged v6 with just a tap on the gas. She has beat every mustang that has had the privilege of racing me as well 4.6 and 5.0, only downfall I've came acrossed is the transmission can't handle the power and dirt roads mess with the tps. As an auto parts associate I've seen 3 other gxps in kansas come to my store looking like garbage because the owners are to lazy to keep up with the maintenance which is kind of expensive.... but regardless any car needs special maintanence to keep it showroom quality. I think this reason alone is why there are so many for sale, whether it be a bad coil, fuel pump or a leaky manifold.

Old thread, but the 5.3 doesn't "beat the supercharged V6 with just a tap of the gas."

I've raced a newer SS Monte with the LS4 and actually held him off for a good time. Stopped and talked to the guy afterward and he told me he didn't think he was going to get me at first.

The supercharged v6 I'm talking about is the 3800 series 2 and with my experience it wasn't even a challenge. I haven't messed with monte carlos because again it wouldn't be fair to my gxp to put it up against somthing that wouldn't be a close race. The only car that has beat her was a 00 corvette, once the road straightened out it was gone.

The supercharged v6 I'm talking about is the 3800 series 2 and with my experience it wasn't even a challenge. I haven't messed with monte carlos because again it wouldn't be fair to my gxp to put it up against somthing that wouldn't be a close race. The only car that has beat her was a 00 corvette, once the road straightened out it was gone.
My Grand Prix is a series 3 supercharged V6.

The Monte SS is the same car as the Grand Prix GXP, just in a different skin.

And the Vette would kill you in the corners too.

Lol like I said I had him in the corners.... apparently your not reading your just arguing. I talked to the guy once I got to the light, he was impressed and admitted the corner got him. The supercharged v6 lacks the horsepower when against an ls4. Then bodyweight comes into play, the Montecarlo could have had extra weight when racing, a caliper sticking, I shift lagging, and so on. I'd say you got lucky

If you had him in the corners the guy had no idea how to drive. A Grand Prix does not handle near as well as a Vette. In fact a Grand Prix handles terrible.

Body weight is not an issue. The Monte actually weighs less than the Grand Prix. 2 door versus 4 door is probably the main difference there.

Yes a LS4 has more power than the supercharged 3800, but horsepower isn't everything. I didn't say I beat the LS4, but I held him off until speeds got way up there. I never figured I'd beat him in the first place, I just went for the fun of it.

And I am not arguing, I am stating facts.

Sounds more like an opinion to me, and he was experienced, he owns more than one, my father has a z06 and he has driven my car as well his opinion is the gxp was smoother than the vet at certain corners, the vet is quicker to fishtail and straighten back out around tight corners. Mabey your "facts" need more experience

I've driven a lot of cars over the years and my EXPERIENCE is that the Grand Prix is the worst handling car I have driven. I have even replaced the entire suspension and it made no difference.

It is also a fact that a Vette will out handle a Grand Prix with a proper driver behind the wheel. Just because the owner has more than one doesn't mean he knows how to drive them. I know people with more than one old school muscle car who can't properly drive them.

With a proper driver behind the wheel that you would have been a spec in his rear view.

You talk about a Vette fishtailing, a proper driver isn't going to let that happen, but lets say a Vette is more prone to fishtail, but a Grand Prix is very prone to pushing into corners due to be a nose heavy FWD.

I'm impressed with the fuel economy in the earlier posts. What can I do to improve my mileage? Two years ago, I bought a 98 GTP sedan with 67k miles. (At least that's what the odometer said.) Drives nicely but not as much punch as my 99 GTP coupe and certainly poorer fuel economy. With the 99 GTP (which I bought with 20k) I get 21-24 city and 29-30 highway. Was always satisfied with that. The 98 GTP only gets 18-20 city and 24-25 highway. I rebuilt the top end and put on a rebuilt s/c (bearings were failing...loud rattle). But no improvement in mileage. Not sure how to identify the cause for poor mileage. I've written it off to getting an old car without any knowledge of its maintenance history.

Holy crap, arguing handling aspects of a grand prix vs a vette?

Just sit in each car....which has the lower center of gravity? Add to that wheel base and suspension components, and it's not even close....