Jump to content

- - - - -

GM Fuel Pump Life Expectancy

This topic has been archived. This means that you cannot reply to this topic.
8 replies to this topic

#1 1999 Tahoe 4x4

1999 Tahoe 4x4


  • Member
  • 349 posts
  • Gender:Not Telling

Posted 18 October 2006 - 06:24 PM

My truck has now 71.000 miles with the original fuel pump. Recently I just PM-ed with somebody of this forum who has already 270.000 miles on the original fuel pump.

But I also saw other people wrote some bad experiences on other forums and a personal friend of mine has had to have his fuel pump replaced after 80.000 long distance daily commute miles, on his two year old Suburban. He has used only brand name gas, and had the scheduled service done at GM. Otherwise as far as maintenance he is the kind of guy you doubt that he knows his vehicle even has such a "thing" called fuel filter.

I'm trying to find out what I can expect from my fuel pump. I changed my fuel filter @ 40.000 miles (next change is coming up soon and I do all other mainenance just as religiously). I almost always use Shell or Chevron gas.

At what mileage did your first fuel pump go?

Edited by 1999 Tahoe 4x4, 18 October 2006 - 06:34 PM.

#2 RaysZ71



  • Member
  • 103 posts

Posted 18 October 2006 - 06:50 PM

On my Suburban, the 1st one went at 137000, the second went out today at 141000.

My Silverado (117000) pump is growling really bad, but still operates fine. I am allready looking at replacing that one.

'99 Silverado Z71
RCLB, 325 Vortec, 4L60E, 3.73 Locking axle, 285 BFGs on ARE Bajas, Ram Air, Descreaned MAF, 3" Cat Back, Wait For Me Tune.

'99 Suburban LT
350 Vortec, 4L60E, 3.73 Locking axle, Skidplates, Stock

#3 1999 Tahoe 4x4

1999 Tahoe 4x4


  • Member
  • 349 posts
  • Gender:Not Telling

Posted 18 October 2006 - 07:01 PM

I'm not sure if I understand it right. So the second one went out 8.000 miles after replacement? Did I get this right? :chevy: If yes, can these things just go any time and it is a matter of luck?

Edited by 1999 Tahoe 4x4, 18 October 2006 - 07:03 PM.

#4 Tucson_02Silverado


    Senior Enthusiast

  • Member
  • 1,477 posts
  • Location:Tucson, Arizona

Posted 18 October 2006 - 07:31 PM

The biggest thing to remember with most Fuel Injected vehicles is that the pump is usually in the tank. By design, the fuel is used as the pump coolant. It is an "unmentioned" good practice to try not let the tank get less than a 1/4.
2002 Chevrolet Silverado 1500 5.3L LM7(T) 3.73 Extended Cab SWB 2WD



    Senior Enthusiast

  • Moderator
  • 15,089 posts
  • Name:Rich
  • Location:Carmichaels,Pa.
  • Gender:Male
  • Drives:'07 Silverado Z71 '11 Camaro SS '02 Saturn SC2

Posted 21 October 2006 - 01:01 PM

Well guys mine just went out at 25,919 miles!
Luckily it went out at work when I was leaving for the day so I was already at the dealership.
I just took home a nice used '05 Z71 Ext.cab for the night!!

I've never had to replace a fuel pump in any of my trucks I had before :gmc:
I hope this one can last until I get a new '07! :cheers:

2015 Silverado Crew-Cab LTZ  "Midnight Edition" - 6.2 - 8 spd. - CORSA exhaust - AIRRAID intake tube - 1.5" leveling - 1" rear lift blocks - HUSKY floor liners - EXTANG full-tilt tonneau - BEDRUG - Black Bear tuned

2011 CAMARO 2SS/RS - LS3/M6 - Inferno Orange Met. - HURST short-throw - Roto-Fab CAI - Kook's LTs - CORSA exhaust - Black Bear tuned (playtoy!)

2012 CRUZE 1LT - Blue Topaz Met. - RS pkg.- Convenience pkg. (work car!)

#6 mikemjohnson



  • Member
  • 351 posts
  • Name:Mike
  • Location:RGV, Texas / NC
  • Gender:Not Telling
  • Drives:2014 Silverado Z71 LTZ

Posted 22 October 2006 - 02:40 PM

my throttle body pump went at 92.000

2014 Silverado Z71 LTZ, stock for a short time...

SOLD 2014 Silverado Texas Edition, 9" Lift / 37s on 20s / All chrome painted black / Tint, sound, exhaust, more

P.S. I am a thinker, not a speller, the big words above are not likely spelled correctly, therefore concentrate on the thought not the letters.




#7 doverarjim


    Senior Enthusiast

  • Lifetime Supporting Member
  • 1,586 posts
  • Name:Jim
  • Location:Dover, Arkansas
  • Gender:Male
  • Drives:2011 GMC 2500 HD 4X4 Crew Cab SB

Posted 22 October 2006 - 09:28 PM

My first problem was fuel level stopped working at about 60,000 miles when I ran out of fuel on interstate, I pull alot of the time so mileage was always kind of a guess so I carried a 5 gallon can with me so when I ran out I could fill up and get to a station. The pump finally quit at 116,000 miles on a trip when I had filled it up about 75 miles before it died!! I am not sure but my pump whinned all the time from when I got the truck until it died, the new one is quite, and since my pump change the level works now so we will see how long this one last, but my two cents worth on this is that the fuel does not cool or lube the pump but the high pressures they work at now is harder on them than the old mechanical ones. :crackup:

doverarjim '99 2500 Ext. cab 6.0l, auto, 3:73 Traded
Now 2011 2500 HD Crew Cab 4X4 DURAMAX/ALLY Silver




  • Member
  • 78 posts

Posted 22 October 2006 - 10:20 PM

Original electric fuel pump on my 1993 Chevy C1500 finally quit two weeks ago after 226,000 miles. :crackup: I replaced the entire assembly(hanger,pump,sender) with a Carter assembly. The key to long fuel pump life is changing the fuel filter regularly. This particular truck has used every brand of gas out there and I usually ran the tank to almost empty most of the time. If you're gonna change the pump the easiest way to do it(on a pickup anyway) is to take the bed off or just lift it back a couple of feet to access the fuel tank.

#9 jschunke



  • Newbie
  • 14 posts

Posted 23 October 2006 - 07:51 AM

Last time I took her down below "E" (low enough to raise the
alarm) while testing the gas mileage (20 mpg) a distinct whining
sound erupted from from an unknown source.

Methinks it was probably the fuel pump under duress. Just
a surmise, nonetheless I lay in the camp that keeping it above
a quarter tank, or at least not taking it down too low is not
a bad idea to promote pump longeviy.

Edited by jschunke, 23 October 2006 - 07:52 AM.