Hi
For the longest time my fuel gage has alway been on full and I never replaced the sending unit, The cost was very high to replace this from my mechanic and the dealer.
Now I have found out the I just need to replace the fuel level sensor, As long as I know which verision of the sending unit I have.
It would be nice to know this ahead of time, So I can order this part on line and not from the dealer, I sure don't want to drop the gas tank twice.
I don't think I have a choice in that.

Non Supercharged 97 w/sender code HEN - use #25314266.
------------------------------------------- HER - use #25314239.
Supercharger 97 w/sender code HEP - use #25314267.
--------------------------------------- HES - use #25314240.
I searched for this at Rock Auto and found the parts between $80-$100.

Kevin

Interesting find....

As far as I know, the fuel level sensor and the sending unit are one in the same. I had to replace my fuel level sensor in my tank, too. The cost was ~$275 from a AC Delco supplier here in town.