by spencerforhire » Tue Aug 17, 2010 6:11 am
GM fuel gauges read resistance to chassis ground from the sender; an open circuit will read over full and a direct short to ground will read below empty. By "3 o'clock position" I presume you mean over past full? If you connect a jumper wire between the tan sender wire and a good ground, the gauge should go all the way down to empty.
A bad ground wire on the sender plug can cause the same symptom, but then the fuel pump wouldn't operate either.
The "fleet"-
72 Vega HB Drag Car -383/'Glide/9"(9.35@146.19)(5.94@117.28 1/8th)
77 Vega Estate wagon- project(someday)will have TPI305/T-5, S-10 spindles/axles
76 Vega GT- 400/4spd/9" retired from active duty(rusty)
06 Silverado 2WD ex.cab daily
03 Silverado 2WD ex.cab (retired)
06 Haulin' 20ft enclosed car transporter
06 GMC Canyon Shop truck
07 Colorado project( 5.3 4L60e swap)
99 Saturn SL1- wife's car
01 Saturn SC2- son's project
07 Saturn Ion Redline project
and 4 more Saturn "parts cars"
Note- the very act of listing all of these has made me realize I have some kind of problem.....
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