Fuel pump power

10

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

510

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

10

Yes it was. It was cranking with no problem.

10

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

510

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 of 1 people found this helpful.
10

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 10,358 nationwide Sierra 1500 listings starting at $2,995.

Postal Code:

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    5,300
  • #2
    John Saffrahn
    Reputation
    3,670
  • #3
    Glenn Clingenpeel
    Reputation
    3,350
View All

Related Models For Sale

Used Ford F-150
457 Great Deals out of 9,153 listings starting at $922
Used Dodge Ram 1500
58 Great Deals out of 532 listings starting at $2,995
Used Toyota Tacoma
28 Great Deals out of 801 listings starting at $5,995
Used GMC Yukon
14 Great Deals out of 855 listings starting at $5,950
Used Chevrolet Tahoe
7 Great Deals out of 633 listings starting at $6,871
Used Chevrolet Camaro
791 listings starting at $13,040

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
11 Great Deals out of 6,674 listings starting at $24,295
2016 GMC Sierra 1500 For Sale
22 Great Deals out of 229 listings starting at $21,988
2015 GMC Sierra 1500 For Sale
65 Great Deals out of 562 listings starting at $20,950
2014 GMC Sierra 1500 For Sale
38 Great Deals out of 518 listings starting at $16,963
2013 GMC Sierra 1500 For Sale
25 Great Deals out of 250 listings starting at $10,995

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.