TBI Fuel Pump Wiring

[MtBraun]

I am converting a 78 GMC K15 with gen 1 sbc/th350 to TBI from a 1991 Chevy 1500 donor truck. I upgraded the fuel system (tank/pump/sending unit) with new aftermarket 1987 V10 parts. The pigtail plug on the new fuel pump has two wires, grey and purple. The TBI harness has a grey wire from the fuel pump relay that should go to the pump. Since I had to cut the fuel pump relay harness before the tank plug on the donor truck, I just need to double check that grey to grey is correct here? And that the purple wire is for the tank level to gauge. Is that correct?

Thank you.

 

[1987 GMC Jimmy]

I am converting a 78 GMC K15 with gen 1 sbc/th350 to TBI from a 1991 Chevy 1500 donor truck. I upgraded the fuel system (tank/pump/sending unit) with new aftermarket 1987 V10 parts. The pigtail plug on the new fuel pump has two wires, grey and purple. The TBI harness has a grey wire from the fuel pump relay that should go to the pump. Since I had to cut the fuel pump relay harness before the tank plug on the donor truck, I just need to double check that grey to grey is correct here? And that the purple wire is for the tank level to gauge. Is that correct?

Thank you.

When I replaced my fuel pump, I don't remember the wiring on it corresponding to my factory wiring colors. If I'm not mistaken tan/white should be the power going to the pump, and pink should be the signal wire for the gauge.

 

[bucket]

The wires to the pump itself in the tank, or the wires that plug into the sending unit?

 

[MtBraun]

The wires to the pump itself in the tank, or the wires that plug into the sending unit?

The sending unit plug. I verified in a subsequent search that the gauge level is purple and power to the pump is grey.

 

[1987 GMC Jimmy]

Ahh, I thought you meant the wires going there and not the wires on the sender themselves. Glad you got it straightened out, though.