plwindish Posted January 31, 2014 Report Share Posted January 31, 2014 One thing the P.O. informed me was that the gas gauge was not working on the car when I got it. The gauge doesn't move from full. If I'm replacing the sending unit, would it be for a 89 Caprice? Link to comment Share on other sites More sharing options...
billy Posted February 1, 2014 Report Share Posted February 1, 2014 no Link to comment Share on other sites More sharing options...
plwindish Posted February 2, 2014 Author Report Share Posted February 2, 2014 Billy, is the sending unit going to be Avanti specific then if its not a 89 Caprice? I assumed the tank was used from the Caprice in them. Link to comment Share on other sites More sharing options...
wdaly Posted February 2, 2014 Report Share Posted February 2, 2014 My '88 is Stewart Warner but it has the 'original-type' fuel tank. You probably DO have a GM sending unit (considering your tank) and GM has used 0-90 ohm sending forever (0 = empty 90 = Full). I would think (if the location of your fuel gauge is not too hard to get to) remove the gauge and take some readings and/or see if the connections are secure at the tank location. Link to comment Share on other sites More sharing options...
plwindish Posted February 3, 2014 Author Report Share Posted February 3, 2014 wdaly, thanks. A 3 ring binder titled the Service Policy and Procedures Manual was included with the car. The binder does have all the wiring schematics and on the gauges page, shows the resistance for the sending unit of 90 ohms for full and 0 for empty. As I remember with my 76, is opposite of the Stude sender reading 0 at full and the higher reading at empty. When warmer weather arrives and I can get under the tank, I'll have to check it out, but it sounds like the unit is GM. Link to comment Share on other sites More sharing options...
2stewed Posted February 23, 2014 Report Share Posted February 23, 2014 PLWindish, If I understood your last posting correctly, you have a "Service Policy and Procedures Manual" for your 1989 Avanti. I would love to obtain a copy of your manual for our 89 Convertible, #540. Is there any way we might work that out? Please email me at rudgleigh@gmail.com and/or call me at 425-941-3314 Link to comment Share on other sites More sharing options...
plwindish Posted February 24, 2014 Author Report Share Posted February 24, 2014 2stewed, Saw your post and sent you and email. Link to comment Share on other sites More sharing options...
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