Bonnevilles had a similar issue in 97. GM did a change and to my knowledge that made the sender have a larger resistance value swing. Say 97 is 0-90 ohms and 98 would be something like 0-255 ohms. This means you probably can't use the sender. Checking the info in the FSM would tell you for sure though.

Also .. afterthought here.. 97 didn't have the pressure sensor on the pump did it?