Just replaced a fuel pump and fuel filter in a 2003 Denali XL 6.0L., Now I've found that I have no power to the fuel pump. I have tracked the power supply back to the fuel relay and found that the relay is working properly, but I am losing the power supply to the fuel pump somewhere between the fuel relay and the fuel pump. I have looked at the entire wire harness from the relay to the tank and can see no damage what so ever. I beleive that the only electrical connection between the relay and the pump is the one above the tank at the fuel pump and it looks brand new. Any body run into this problem before?

10

Asked by Aug 03, 2013 at 02:43 PM about the 2000 GMC Yukon Denali 4WD

Question type: Maintenance & Repair

2003 Yukon Denali XL 6.0L.

3 Answers

90,795

Yes, it was the connector at the fuel pump, had a small burnt spot in it, It was small enough that I didn't notice it when I replaced my fuel pump and had the same problem. Replaced connector and it fired right up.

1 out of 1 people think this is helpful.
10

Update on the above question. I originally picked up the replacement pump at the local pep boys and found that they had given me the wrong part. I was working on a 1500 and they gave me a pump for a 2500. Well, while packaging the wrong part back up to return, a small wiring pkg. was not put back in the box and left on my work bench. After returning the part and recieving the correct part and installing it, I found that the fuel pump still did not work. With the tank still lowered, I checked the voltage at the pigtail and found that I did have 12 volts. After scratching my head for a few minutes, I remembered that short wiring pigtail from the first pump that was still sitting on my work bench. I installed it between the fuel pump and the wiring harness and turned the key to the on position, wala! I had fuel !!! Evidently the new pumps are wired differently and need the short pigtail to convert the wire positions to match the new pumps. Funny though that the second pump that I purchased did not have this little pig tail in the box with the fuel pump. Hope this helps anyone else that may run into the same problem!

1 out of 1 people think this is helpful.

Thanks I have been having this same problem or it would seem, I replaced the original pump last year and the new one only lasted one month, they replaced it under warranty and that one lasted almost a year, I replaced that one with a different brand about three months ago and it died again. So I am thinking it is some other problem as you described above. The first two were replaced at a garage, you would think they would check the wiring. thanks JAck

Your Answer

Add photo

Related Questions

  • Fuel pump relay 4 answers

    Working on my 2002 gmc yukon fuel problem. Found at my relay I have power on one prong of the relay but when I crank it I have no power to my load side feed. I've been messing with it for a week a...

    2002 GMC Yukon 4WD

    -

    Maintenance & Repair

  • 02 denali No power to Fuel Pump 2 answers

    i was driving my truck the other day and when i turned it off to do some fireFighting,,when i went to go home..the truck would start and idle for about 10 seconds and then die..It would keep starting ...

    2002 GMC Yukon Denali AWD

    -

    Maintenance & Repair

  • Replaced fuel pump but still no pressure 1 answer

    Replaced the fuel pump on my 2002 Yukon but same problem persist no power to the fuel pump checked all fuses and relays dunno what else it can be

    2002 GMC Yukon SLT

    -

    Maintenance & Repair

  • vehicle won't start 6 answers

    I have a2001 Yukon that won't start... I have checked the batteries and alternator... recently replaced the fuel pump. one day it started then shut off and now it won't start. what am I missing?

    2001 GMC Yukon SLT

    -

    Maintenance & Repair

  • no power to fuel pump 4 answers

    were is the fuel pump fuse

    2000 GMC Sonoma SLS Ext Cab Short Bed 2WD

    -

    Maintenance & Repair

Yukon

Looking for a Used Yukon in your area?

CarGurus has 17,155 nationwide Yukon listings starting at $2,500.

ZIP:

Search GMC Yukon Questions

GMC Yukon Experts

#1 clayduster71
clayduster71
Reputation 2,080
#2 Danielle Heller
Danielle Heller
Reputation 460
#3 David Boccabello
David Boccabello
Reputation 440
View All

Related Models For Sale

Used Chevrolet Tahoe
568 Great Deals out of 27,373 listings starting at $1,500
Used Cadillac Escalade
243 Great Deals out of 10,983 listings starting at $3,000
Used GMC Yukon XL
264 Great Deals out of 12,001 listings starting at $1,999
Used Chevrolet Suburban
336 Great Deals out of 18,945 listings starting at $2,295
Used GMC Sierra 1500
812 Great Deals out of 66,570 listings starting at $1,995
Used Ford Expedition
419 Great Deals out of 25,204 listings starting at $1,750
Used Chevrolet Silverado 1500
1,740 Great Deals out of 168,425 listings starting at $1,800
Used Ford Explorer
807 Great Deals out of 74,599 listings starting at $750
Used Ford F-150
2,242 Great Deals out of 208,465 listings starting at $1,499
Used Jeep Grand Cherokee
1,044 Great Deals out of 73,624 listings starting at $950
Used Dodge Durango
254 Great Deals out of 22,949 listings starting at $1,500
Used Toyota 4Runner
270 Great Deals out of 20,689 listings starting at $1,995
Used Lincoln Navigator
103 Great Deals out of 5,778 listings starting at $1,499

Used Cars For Sale

2017 GMC Yukon Denali 4WD For Sale
3,447 listings starting at $61,341
2016 GMC Yukon Denali 4WD For Sale
11 Great Deals out of 388 listings starting at $47,800
2015 GMC Yukon Denali 4WD For Sale
15 Great Deals out of 529 listings starting at $39,995