Fuel pump power

20

Asked by Jun 06, 2017 at 10:59 PM about the 1995 GMC Sierra 1500 C1500 SLE Extended Cab LB

Question type: Maintenance & Repair

Good evening, I am seeking advice about my truck.
I changed the oil sending unit and now I have to
hardwire my fuel pump to the battery. It takes a lil
time for my truck to start. The relay is new. Does
anyone know what it could possibly be?

5 Answers

760

Was fuel pump coming on before you swapped oil pressure switch. If not. Check the ground on frame. Might just need to clean up the ground location. Was other switch leaking

20

Yes it was. It was cranking with no problem.

20

I am losing oil from around that area. This was the reason why I changed it.

760

Before hard wiring. Recheck connection on oil pressure switch. That has to energize before fuel pump will come on. With switch on. Orange wire on. Oil pressure switch should have power and the grey should have power. 12 volts on both. The Orange wire on sending unit is powered by ecm b fuse under the hood junction block. If no power on grey wire coming from oil pressure switch. Engine will not start. If you do have 12 volts on grey check your fuel pump relay.

1 people found this helpful.
20

I'll check but I did replace the relay with a new one

Your Answer:

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 60,078 nationwide Sierra 1500 listings starting at $1,495.

ZIP:

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    5,600
  • #2
    John Saffrahn
    Reputation
    3,920
  • #3
    Glenn Clingenpeel
    Reputation
    3,740
View All

Related Models For Sale

Used Ford F-150
2,319 Great Deals out of 198,938 listings starting at $1,300
Used Dodge Ram 1500
346 Great Deals out of 9,243 listings starting at $1,800
Used Toyota Tacoma
429 Great Deals out of 49,112 listings starting at $2,400
Used GMC Yukon
335 Great Deals out of 22,092 listings starting at $2,950
Used Chevrolet Tahoe
655 Great Deals out of 38,141 listings starting at $1,199
Used Chevrolet Camaro
242 Great Deals out of 26,934 listings starting at $2,900
Used Ford Mustang
297 Great Deals out of 39,759 listings starting at $1,312

Used Cars For Sale

2018 GMC Sierra 1500 For Sale
55 Great Deals out of 34,392 listings starting at $20,490
2017 GMC Sierra 1500 For Sale
124 Great Deals out of 5,461 listings starting at $18,488
2016 GMC Sierra 1500 For Sale
58 Great Deals out of 2,748 listings starting at $16,700
2015 GMC Sierra 1500 For Sale
84 Great Deals out of 4,649 listings starting at $11,995
2014 GMC Sierra 1500 For Sale
62 Great Deals out of 2,775 listings starting at $9,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.