[98-K1500]

1998 gmc k1500 5.7L. installed new fuel pump assembly. one of the connectors was different so i spliced a new connector in to fit the one (one of two, the other matched up) on the top of the new fuel pump. strapped the tank back up, connected the battery, cycled the key and did not hear the pump engaging. got the voltometer out on the connector i spliced - there are 4 prongs, 2 are grounds, 1 is power to the pump, the other is sender signal. there is no reading for the gray wire which is pump power so obviously the pump isnt engaging. any idea what could cause this?

 

[_LSX_]

3 threads, same question?

C'mon man! :facepalm:

 

[lsxmotors]

Not sure if this question is answer or not,What was the cause for changing the fuel pump?

 

[torkin82]

My chicks 99 tahoe is doing similar things, I wasnt around at the time the fuel pump was replaced so she had a local shop do it. with hers if you crank on it and turn the key on and off a few times itll always get going but it doesnt consistently turn on. curious to see if you come up with anything on this. Ive been thinking about throwing another pump in it cuz from what I've heard these years of pumps can be difficult