redynscire Posted June 4, 2011 Report Share Posted June 4, 2011 Does anyone know if the 95'/96' fuel pump sending unit and the 97'/99' one for Monte/Lumina are interchangeable??? I know the plugs are different, earlier style has 4 wires vs. newer has 6 wires. I just want to know if the newer unit will fit in the older gas tank?? thanks Quote Link to comment Share on other sites More sharing options...
BXX Posted June 4, 2011 Report Share Posted June 4, 2011 It should fit the tank. And the two additional wires are for the fuel tank pressure sensor. Im confused why you want to replace something with the wrong part though. Quote Link to comment Share on other sites More sharing options...
redynscire Posted June 4, 2011 Author Report Share Posted June 4, 2011 my car is a 95' monte carlo ALOT on this car is the wrong part from the L67 with the 4T65E, there is not a lick of original wiring, ENTIRE car harness changed to 99' monte... i knew the 2 other wires are for fuel tank pressure sensor. kinda the whole reason i was asking. the car being a 95' never had pressure sensor. since i have a 02' gtp pcm it throws CEL for that. thought if i could change out the whole sending unit id have my pressure sensor... plus at the moment my fuel gauge is inop. not sure if that has to do with my 95' gauge cluster, or if it has to do with the 95' sending unit? i've double checked the fuel pump/ sending unit wiring... had to reverse the fuel pump 12+ and the fuel gauge feed wires to hook the 6 wire plug to the old 4 wire plug for now. works but no fuel gauge. and the no pressure sensor thing. wish i knew someone close with hptuner cause i need to program for my 3.29 gear too. wrong transmission too.. 01' gt 4t65e non hd.. Quote Link to comment Share on other sites More sharing options...
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