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Username Post: EXTREMELY loud fuel pump        (Topic#351519)
Junkyardwarrior 
Contributor
Posts: 331

Loc: Yuma AZ
Reg: 02-25-15
06-11-18 02:23 PM - Post#2736619    

I couldn't seem to find anything on this. Just driving around town, not doing anything crazy, my fuel pump is not noticeable over the noise of the truck unless you stand next to the truck. However, after about 185 miles in a straight shot up to phoenix, the pump was just screaming loud. I went through a drive through and all you could hear was the high pitch whine of the pump. When I shut the truck off it sounded horrible. I also noticed what felt like a severe lack of power when I got on the throttle, which happens a lot on I-10 with those no driving morons. The truck has never failed me so far, and I would like to keep it that way, especially with my intentions on moving from az to nc in the next couple months towing my Nova the whole way. Anyone deal with this before? For those that don't know, it's a 99 K2500 7.4 completely stock outside of the lights and the stereo. Even has the stock exhaust.

"8 cylinders of why the f&@% not" - me


 
bowtie44s 
Valued Contributor
Posts: 3988
bowtie44s
Age: 35
Loc: wv
Reg: 08-29-12
06-12-18 12:49 PM - Post#2736728    
    In response to Junkyardwarrior

Time to change the fuel pump. My personal opinion is it's much easier to slide the bed back than drop the tank. Living in Phoenix, you probably don't even know what rust or seized bolts are. Shouldn't be bad at all for you.

Jeff

'88 Chevy K3500, aluminum head roller cam 511in³ stroker 10.5:1 compression, 96 NV 4500, 94-98 grille, 305/70-16 (33x12) BF Goodrich KM2s, 91 cluster swap


 
Junkyardwarrior 
Contributor
Posts: 331

Loc: Yuma AZ
Reg: 02-25-15
06-12-18 01:01 PM - Post#2736732    
    In response to bowtie44s

Man, that's on the list of crap I really don't want to do either way. And yeah, hardly any rust. oddly enough there is some on the top by the windshield so that leaks the 3 times a year it rains here but other than that even the front suspension came apart without much complaint. What are the odds that the fuel filter is the culprit?

"8 cylinders of why the f&@% not" - me


 
454cid 
Valued Contributor
Posts: 2920

Age: 45
Loc: West Michigan
Reg: 02-18-12
06-12-18 06:13 PM - Post#2736762    
    In response to bowtie44s

  • bowtie44s Said:
Time to change the fuel pump. My personal opinion is it's much easier to slide the bed back than drop the tank. Living in Phoenix, you probably don't even know what rust or seized bolts are. Shouldn't be bad at all for you.



I completely removed my box, but I also undercoated the frame at that time, too. I bet sliding it back would work great.

I think the bed bolts are the bolts that I priced at the dealer and found them to be very expensive. I used those plastic push pins that normally hold up hood insulation to pad the box and the frame when I put it back together.

Also, I would recommend buying a new seal and retaining ring for the pump. I don't recall if the AC Delco pump came with the seal or not, but it did not come with the ring. That delayed me in replacing the pump because my original was quite rusty, and I had to wait for it to be ordered, after I had already waited for the pump. You may find that yours is rusty even though you're in AZ since it's on top of the fuel tank, and will collect dirt, which will in turn hold moisture. I filled that area with grease as a rust preventative.


99 K3500 RCLB


 
rockfangd 
"5th Year" Gold Supporting Member
Posts: 2454
rockfangd
Age: 32
Loc: Utica ny
Reg: 04-13-10
06-12-18 07:30 PM - Post#2736774    
    In response to 454cid

change that pump asap. It likely had a bad connection and the resistance killed the windings in the pump.
Burnt plugs are very common on GMs of this era

Old School GM fan FOREVER


 
bowtie44s 
Valued Contributor
Posts: 3988
bowtie44s
Age: 35
Loc: wv
Reg: 08-29-12
06-12-18 08:16 PM - Post#2736782    
    In response to 454cid

  • 454cid Said:
I completely removed my box



It took me a minute to figure out what you were talking about, then I remembered some places up north call the bed a box.


Jeff

'88 Chevy K3500, aluminum head roller cam 511in³ stroker 10.5:1 compression, 96 NV 4500, 94-98 grille, 305/70-16 (33x12) BF Goodrich KM2s, 91 cluster swap


 
454cid 
Valued Contributor
Posts: 2920

Age: 45
Loc: West Michigan
Reg: 02-18-12
06-12-18 09:51 PM - Post#2736791    
    In response to bowtie44s

  • bowtie44s Said:
  • 454cid Said:
I completely removed my box



It took me a minute to figure out what you were talking about, then I remembered some places up north call the bed a box.




Really? I thought that was fairly universal. I guess it's like when I read someone calling there cap something like a "topper".

I sleep in my bed, I haul stuff in the box :-)


99 K3500 RCLB


 
Junkyardwarrior 
Contributor
Posts: 331

Loc: Yuma AZ
Reg: 02-25-15
06-12-18 10:27 PM - Post#2736792    
    In response to 454cid

Not gonna lie there is a lot of language that I want to use right now that isn't appropriate for this particular platform... I REALLY don't want to have to replace the pump. But as it is, I would rather not lose the damn thing going up a mountain in west Texas.

"8 cylinders of why the f&@% not" - me


 
454cid 
Valued Contributor
Posts: 2920

Age: 45
Loc: West Michigan
Reg: 02-18-12
06-13-18 12:23 AM - Post#2736796    
    In response to Junkyardwarrior

  • Junkyardwarrior Said:
Not gonna lie there is a lot of language that I want to use right now that isn't appropriate for this particular platform... I REALLY don't want to have to replace the pump. But as it is, I would rather not lose the damn thing going up a mountain in west Texas.



It's not that big of a deal when pulling the box. You don't have to drop the tank, you don't have to siphon gas, you can stand up while connecting hoses and wires. It might take some fiddling to get the fuel lines disconnected. I bought two sets of the tools to disconnect them, and I think I still had to break one of the original connectors on the old pump.

The box is eight bolts, plus you'll need to disconnect your tail lights and fuel filler. I don't remember if I had the bumper off or not... if you leave it on you'll have to lift the box over the bumper. You may want to remove it so save your paint. There were four of us that lifted mine off. When putting the box back on, you might want a person handling the filler hose so it doesn't get caught on the boxside...I tried to have my sister do that. Unfortunately, she had no idea what I was talking about, and it caught the boxside :-(


99 K3500 RCLB


 
Keith_Knox 
Moderator and "16th Year" Gold Supporting Member
Posts: 5925
Keith_Knox
Age: 76
Loc: Napa, Ca USA
Reg: 04-02-00
06-13-18 08:21 AM - Post#2736823    
    In response to 454cid

I removed the bed on my 92 S10, by lifting it off with my cherry picker. I took it of and put it back on by my self. Think it only had 4 bolts tho.

1948 Chevy Fleetmaster Coupe Purchased 6/2010. Stock with rebuilt 52 216 installed May 1966.
1946 Chevy 1/2 ton pickup, stock. Purchased 11/18/17.
1962 Ranchero Purchased 4/2017 221 V8 Automatic.
2013 F150 Crew Cab


 
Junkyardwarrior 
Contributor
Posts: 331

Loc: Yuma AZ
Reg: 02-25-15
06-13-18 09:23 AM - Post#2736830    
    In response to 454cid

It's not doing the work that gets me. It's paying for the pump with all the other stuff I have to replace on it and my Nova right now before I move. Seems like every issue wants to show up at once, when I need them the least.

"8 cylinders of why the f&@% not" - me


 
someotherguy 
Moderator
Posts: 28718
someotherguy
Age: 48
Loc: Texas
Reg: 08-01-03
06-13-18 10:04 AM - Post#2736834    
    In response to Junkyardwarrior

Your 1999 model uses an all-in-one pump contraption with the sending unit in a plastic bucket. I call it the plastic trash can pump. Your best bet is to stick to good names like AC Delco or Delphi; ignore the rest, especially Airtex.

Keep in mind it's easy to spec the wrong pump for this truck being a 1999 classic model; you may be better off using 1998 as your model year when looking up parts. The 1999 redesign truck uses a completely different setup.

Pay attention to the code letters on top of your existing pump; you'll need it to buy the correct new pump.

Richard

06 Silverado ISS / 06 Silverado SS / 06 300C SRT8


 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17185
grumpyvette
Age: 70
Loc: FLORIDA USA
Reg: 03-16-01
06-13-18 01:55 PM - Post#2736850    
    In response to someotherguy

Id just point out that in most O.E.M, in the fuel tank electric fuel pumps are cooled by sloshing fuel, if you let the tank regularly get below about 1/4 full the pump spends more time not being cooled to ideal levels and statistically it tends to wear out a bit faster, Id also point out that adding several ounces of Marvel Mystery Oil to each fill-up seems to help reduce wear issues and varnish and rust problems inside the fuel tank
look at the pictures in this thread carefully, similar too this,
the electric fuel pump is located in the lower 1/4 of the tank too insure its cooled by sloshing fuel


http://garage.grumpysperformance.com/index.php?thr...

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


Edited by grumpyvette on 06-13-18 02:18 PM. Reason for edit: No reason given.

 
454cid 
Valued Contributor
Posts: 2920

Age: 45
Loc: West Michigan
Reg: 02-18-12
06-13-18 05:00 PM - Post#2736876    
    In response to someotherguy

  • someotherguy Said:
Your 1999 model uses an all-in-one pump contraption with the sending unit in a plastic bucket. I call it the plastic trash can pump. Your best bet is to stick to good names like AC Delco or Delphi; ignore the rest, especially Airtex.



What's your feeling on this? Only $38 from Rockauto. It's listed for my 99.

Link



99 K3500 RCLB


 
someotherguy 
Moderator
Posts: 28718
someotherguy
Age: 48
Loc: Texas
Reg: 08-01-03
06-13-18 05:19 PM - Post#2736879    
    In response to 454cid

There's a similar offering from AC Delco and I'd buy that before I would ever trust some no-name pump.

I used to recommend the pump-only fix kit for the plastic trash can assembly, because back in the day the assembly was $300! It's half the price now so it only makes sense to go ahead and replace the whole thing while you're in there, so you get a new sender while you're at it. No sense having to drop the tank twice.

Richard

06 Silverado ISS / 06 Silverado SS / 06 300C SRT8


 
bowtie44s 
Valued Contributor
Posts: 3988
bowtie44s
Age: 35
Loc: wv
Reg: 08-29-12
06-13-18 05:57 PM - Post#2736883    
    In response to someotherguy

  • someotherguy Said:
There's a similar offering from AC Delco and I'd buy that before I would ever trust some no-name pump.



^ I agree with that 100%!

Jeff

'88 Chevy K3500, aluminum head roller cam 511in³ stroker 10.5:1 compression, 96 NV 4500, 94-98 grille, 305/70-16 (33x12) BF Goodrich KM2s, 91 cluster swap


 
454cid 
Valued Contributor
Posts: 2920

Age: 45
Loc: West Michigan
Reg: 02-18-12
06-13-18 06:24 PM - Post#2736890    
    In response to someotherguy

  • someotherguy Said:
There's a similar offering from AC Delco and I'd buy that before I would ever trust some no-name pump.



I didn't know AC Delco had one... it's not listed for my truck on Rockauto, that I see. It's possible they just don't have it, Though.


99 K3500 RCLB


 
Stinky 
Senior Member
Posts: 1602

Loc: Whitewater, CO
Reg: 05-25-01
06-16-18 07:58 AM - Post#2737157    
    In response to 454cid

This is $148
https://www.rockauto.com/en/moreinfo.php?pk=148154...

They also have an AC at 138

Carter starts at 108

Something I like about the RA catalog is that you can click on the PN and it will show you the cross over.



 
Junkyardwarrior 
Contributor
Posts: 331

Loc: Yuma AZ
Reg: 02-25-15
07-06-18 10:33 AM - Post#2739185    
    In response to Stinky

Out of all the weird stuff I swear. My battery completely died last weekend out of nowhere. Now that I've replaced said battery, my fuel gauge doesn't move nearly as much, my lights are a lot brighter (to include my LED bars), and now the pump doesn't complain nearly as loudly as it did. There is still a light whine when it's been going a while, but not the death scream it had before.

"8 cylinders of why the f&@% not" - me


 
Junkyardwarrior 
Contributor
Posts: 331

Loc: Yuma AZ
Reg: 02-25-15
07-06-18 10:34 AM - Post#2739186    
    In response to Junkyardwarrior

Also, my truck may be a 99, but it is still a GMT-400. It's a Sierra "classic".

"8 cylinders of why the f&@% not" - me


 
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