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97 GTP vs other years?

Pittman06

Pittman06

New member
i did search a little and read some stickys and i cant find any to the point info on this, i just got a 97 GTP, and i'm aware the PCM is different then other years, but why, and what else is not interchangable. I thought all this body style were generally the same
 


They updated PCM's in late 97 I believe. Yours has 4 connectors while the 98-03 have just two.

Another thing is the transmission. Yours is vacuum controlled while 98+ are not.

Throttle body is different as well in 97 and 98. They have a sealed MAF sensor while the 99+ is opened.

Trying to think of other things. I know the DIC is different, like 98+ has trac control and yours doesn't (if I recall)
 
the 97 GTP has the 4t65e, so its not vacuum controlled. only 97 SE and GT came with the vacuum one.
 
Bio248 said:
the 97 GTP has the 4t65e, so its not vacuum controlled. only 97 SE and GT came with the vacuum one.
Click to expand...

Yep and IIRC (trannyman would have to comfirm this) later year SE/GTs in 97 got the 4T65 instead of the 4T60 (vac controlled) tranny.

GTP has always has the 4T65-HD in the 97-03 GPs...
 
Also the supercharger has a different vacuum routing, evap system is different, the airbox, abs pump, pcm, washer & coolant bottle locations, HVAC color is green, DIC doesn't have tc as previously stated, a lot of 97 only had a manual lumbar (I got lucky and have power :P ), most 97 have a full antenna instead of the window antenna, the vacuum controlled trans as previously stated, tb...that's all I can think of atm...
 


Iron Indian said:
Yep and IIRC (trannyman would have to comfirm this) later year SE/GTs in 97 got the 4T65 instead of the 4T60 (vac controlled) tranny.

GTP has always has the 4T65-HD in the 97-03 GPs...
Click to expand...


97 was still vacuum controlled with the 4T65-HD. 98+ had the 4T65-EHD (electric).
 
97gpGTP said:
97 was still vacuum controlled with the 4T65-HD. 98+ had the 4T65-EHD (electric).
Click to expand...

Wait, what?

So you are telling me that my 97 GTP has a vacuum controlled tranny!?!?

And here I have been trying to tune it with my PT all this time! :th_scratchhead:
 


97gpGTP said:
97 was still vacuum controlled with the 4T65-HD. 98+ had the 4T65-EHD (electric).
Click to expand...

ALL 97-03 GTP's have an electronically-controlled 4T65E-HD!

To answer the OP: Just about everything is interchangeable. Some parts may require a little bit of modification.

The washer fluid reservoir is in a different location on '97 and '98 than the '99+ making some aftermarket intakes un-usable. This can be fixed by getting and installing a newer reservoir and removing the old one.

The air box in '97 and '98 is also VERY inefficient compared to the newer ones. (This goes back to the coolant reservoir issue, too)

The PCM is physically larger than the '98 and newer ones, but does have the same plug type.

You do not have traction control of any kind (you can consider that a blessing if you are like me and prefer not to have it anyway).

The throttle body for '97 and '98 is a little different and uses a different style MAF. The '99+ ones flow a little better in stock form. (However, a ported '97-'98 TB can outflow even a modified '99+ TB.)
 
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thanks for all the info, i'm glad to finally get one way on the trans issue lol, which i checked for myself on that to make sure, I was nearly positive they were not vacuum. Thanks and this really does help in my junkyard hunting that will be taking place oh so frequently in the next few weeks for this turd
 
97gpGTP said:
Also the supercharger has a different vacuum routing, evap system is different, the airbox, abs pump, pcm, washer & coolant bottle locations, HVAC color is green, DIC doesn't have tc as previously stated, a lot of 97 only had a manual lumbar (I got lucky and have power :P ), most 97 have a full antenna instead of the window antenna, the vacuum controlled trans as previously stated, tb...that's all I can think of atm...
Click to expand...

I don't think lumbar made a difference, my 98 has manual lumbar...
 


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