Ok..that might explain it a little. Your car is a very late model 97. It is possible GM began switching over to the new fuel tank/evap setup at that point.

This is the kind of think many mechanics run across. When ordering parts for a car, most will automatically base the parts off the door jamb and not the vin.

Thanks jmandeville good information and good pictures.

The service manual diagram ( first picture in the thread ) is the same as my 96 W-body service manual. LOL

http://i35.photobucket.com/albums/d1...P_LAYOUT_2.jpg

That'* a bad link you put in.

I just spent the last hour trying to upload a picture and nothing works.

See the first picture in this thread.


https://www.gmforum.com/mechanical-134/dtc-p0440-1997-se-287209/

To upload a image just click on the small box above that looks like mountains and a tiny sun. Then paste the image URL there and click ok.