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1996 Yukon fuel pump?

- GMC-Yukon XL
Forum Post
02/25/09 18:04
josh

1996 Yukon fuel pump?

our Yukon has died on us twice now. We had it towed to the house and the driver said try hitting the gas tank with a mallet to see if starts. It tried to start and after a few whacks it started and we drove it for a day. On the way home I noticed itacted like it was going to die so I gassed it and made it home. I replaced the fuel filter and it won't start again. My uncle said he had a similar issue and replaced an o2 sensor but there are no codes. Please help! Thanks.
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This post has a total of 22 replies. Your feedback, comments, opinions and questions are welcome and encouraged.

This forum post has messages dated from 02/25/09 through 03/20/12, please be sure to read all the messages. If you feel it is old or outdated, please follow up with a question or comment and someone may be able to update it, or reply with newer information if you have it.

1
02/26/09 01:59
ty

only way to know for sure is to hook a fuel pressure tester to the shrader valve (the valve on the fuel rail that looks like the valve you put air in the tires with) and find out if the fuel pressure is within specs. (i believe its supposed to be 35 to 45psi). for a quick test, the next time it wont start, just press on the shrader valve core and see if anything squirts out of it. no pressure, no working pump. any REAL shop should be able to diagnose a fuel pump in about a half hour.

good luck

ty

2
03/16/09 23:24
Francisco

Josh, I have a similar problem on my yukon, Iīm almost shure that itīs a problem with the fuel filter so I will replaced it.

Could yo please tell me where is it on the yukon? At the tank or at the chassis above the driver seat??

Thanks!

3
04/24/09 20:00
Dan

Have a 1996 Yukon that started a little hard one day. That evening it would not start at all anymore. I suspect fuel pump and have tried the mallet on the fuel tank. No luck. Also have checked and replaced relay. It works yet no start. I used to be able to hear a whine like the pump when the key was turned on but no more. Suspect possibly fuel pump but curious what else may cause this. Willing to try all ideas. Again tried to slap the tank with mallet and it makes absolutely no difference.

THanks,

Dan

4
06/06/09 14:58
Wes

1996 GMC van; 5.7 Vortec motor. No power getting to fuel pump. Relay and fuse both good. Was running fine on highway. Refused to start after 10 minute rest stop. Help please!
5
06/29/09 02:20
Terry Panec

I have a 1996 GMC Suburban and a 1999 GMC Yukon. First, if the fuel filter clogs, the fuel pump will fail. You should replace it at least once a year. That said, I have replaced the fuel pump in the 1996 Suburban once, and I am replacing the fuel pump in the 1999 Yukon for the third time. The first two were OEM replacments, the one I am in the process of replacing is a kit, which includes a new pigtail wiring harness. It changes the connector from a square to an inline row of contacts. There seems to be an issue with the original connector.
6
09/10/09 15:56
Bill

96 Yukon SLT 5.7, 4WD with 120000 miles. Engine turns over but won't start. This has happened twice now after I filled up with gas. I tend to squeeze in as much fuel as possible. After I fill up I then drive about 30 miles. It will restart all day long, but once it sits overnight, it wonít start. Iíve heard that over filling the fuel tank could possibly cause these symptoms.

When it does run, it runs great.

Iíve done all the usual within the last 2000 miles; new plugs, plugwires, rotor, cap, O2 sensors, coolant temp sensor, and fuel filter. Had injectors cleaned at the GM dealer. The fuel pump relay failed and was replaced. Just replaced a leaky water pump.

When I turn the key on, I hear the fuel pump running (a soft humming sound) for about 2 seconds.

Thanks for your time and expertise.

7
11/17/09 12:51
Mike

I have the same issue here on a 97 yukon.

THANKS FOR ANY HELP!!!

6 Bill (68.220.92.160) - Thu Sep 10 15:56:54 2009

96 Yukon SLT 5.7, 4WD with 120000 miles. Engine turns over but won't start. This has happened twice now after I filled up with gas. I tend to squeeze in as much fuel as possible. After I fill up I then drive about 30 miles. It will restart all day long, but once it sits overnight, it wonít start. Iíve heard that over filling the fuel tank could possibly cause these symptoms.

When it does run, it runs great.

Iíve done all the usual within the last 2000 miles; new plugs, plugwires, rotor, cap, O2 sensors, coolant temp sensor, and fuel filter. Had injectors cleaned at the GM dealer. The fuel pump relay failed and was replaced. Just replaced a leaky water pump.

When I turn the key on, I hear the fuel pump running (a soft humming sound) for about 2 seconds.

Thanks for your time and expertise.

8
01/06/10 12:46
wade

ISSUE COULD DEFINITELY BE A FUEL PUMP, EVEN THOUGH YOU CAN HEAR IT WHIRL WHEN THE KEY COMES ON. IF THE PUMP DOES NOT WHIRL, THEN CHEC THE MAIN GROUNDS UNDER THE HOOD. THE GROUND STRAPS DETERIORATE AFTER TIME AND TURN TO DUST. IT TOOK FOREVER TO FIND THIS AND ONLY AFTER REPLACING FUEL FILTERS AND PUMPS. THE PRESSURE ON A 5.7L HAS TO BE 60LBS AND A BAD GROUND WILL GIVE YOU 40 BUT THAT IS NOT ENOUGH. THE FUEL PUMP GROUNDS TO THE FRAME, CHECK THAT GROUND BUT ALSO THE STRAP ON THE FRAME NEAR THE STARTER.
9
01/25/10 19:55
michael brock

95 gmc yukon wants to die when you give it a lot of gas, im able to bring the rpm's up if i go real slow thouhg. already replaced cat, any info helps.
10
01/31/10 18:30
agent00kevin

I had the same issue with no fuel pump sound, no start. Its definitely not working, and it didnt a a few days ago. I messed with the battery, took it out, put it in, no good. It suddenly decided to stat for no reason, and was fine for about 1 week. Now I drove it home from where I am working 7 hrs away, and it wont start again. No fuel pump sound, no start. Pour gas in the TB, it fires and coughs and sputters. Im going to replace the relay though I believe its fine after testing, since its cheap and easy.

Next, I will lower the tank enough to check the connections as they are very well known to go bad. If I cannot get the pump to run then, I will finish disconnecting everything and drop the tank.

BUT- I am going to CUT an access panel in the floorboard and make sure that in the future its much easier. I little weather strip and 4 fasteners and slap the carpet back on top - next time, its 1/2 the work or less :)

11
03/09/10 19:23
Jeff

Need help with my 1996 GMC yukon. The service engine light wint go out. I tested it and said it was a bad injector. Any ideal on what to do how to change them
12
03/09/10 19:24
Jeff

Need help with my 1996 GMC yukon. The service engine light want go out. I tested it and said it was a bad injector. Any ideal on what to do how to change them
13
04/08/10 22:46
Lisa Kumha

Have a 2008 Yukon XL. Drove it to Florida from Chattanooga (about 9 hours). Drove fine until we got there. Unpacked, went back to truck, wouldn't start on first try, engine would turn over, but no start. Started on second try, no problem. This same scenario has happened every time we have started the truck since then. It always starts on second try, but what could be the problem? Don't want to get ripped off at dealer.

Thanks for any help.

14
05/09/10 22:08
Greg

Where is the fuel filter on a 1997 GMC yukon located?
15
07/18/10 13:31
Mike

Hello,

I have a 1997 suburban 2 wheel drive- the fuel pump went out at 110, miles and I replaced it ( completely ) and it ran fine - at 170, miles I pulled up into the drive way at my house and when I came back to start it the next day it would not start. No fuel, seemed like the same problem as before so I got a new fuel pump and installed it. The fuel guage is pegged all the way past full - seems to have no power to the fuel pump - checked the fuel pump relay and it seemed fine - got a new one anyway. I have cleaned the wire harness end - checked the ground - added more ground wires to the frame and engine. It will start if I manually put gas in the carb but the pump will not come on.

My question is what do I do next? is there a fuse I am missing that could have went out? why is the fuel guage pegged like it has current to it and it does not go down even when the trucks off or with the battery disconnected?

Thanks if you can help - and thanks for your time even if you can't.

Mike.

I hope some one can help.. LOl I am really at the end of my rope with this thing.

16
08/14/10 09:46
Robert Kotick

I am also having the same starting problems after the car has been sitting overnight only. Once you get it started, it will start all day. It is a 96 GMC Suburban 5.7 Votec model. I wnated to check the fuel pressure as suggested, however I don't have a schreifer valve on mine. I just have 2 hard lines that that feed into the rear of the throttle body assembly with a securing clamp. How would I go about checking thew pressure on this set-up. I am guessing that one line is fuel flow in and the other is over-flow return line to the tank.

Thanks for any insight. - Bob

17
10/18/10 12:08
bets209@yahoo.com

i have a 1996 yukon it would turnover but wouldnt stay on unless i gassed it up, this all happened when i drove it passed the reserved gas. so i changed the fuel filter it was clogged real dirty now the truck starts and stays on but it dont sound like its still getting the suffeciant gas becauyse it idles up and down / what could it be ? if it is a bad pump would the truck turn on ?
18
10/18/10 12:11
tim

How many fuel filters is there on a 96' 4x4 yukon gmc?
19
03/28/11 06:25
JOJO

I ALSO HAVE A 1997 GMC YUKON. IT WONT START AND I HAVE HAD THE FUEL PUMP REPLACED TWICE. I AM VERY ANGRY. IT DOESN'T MAKE THE WHIRLING SOUND THAT IT SHOULD. SO I FIGURE ITS THE FUEL PUMP AGAIN. WHAT CAN I DO. I HAVE PAID A MECHANIC TWICE TO REPLACE IT

I AM A SINGLE MOTHER AND CAN'T AFFORD THIS. HELP ME PLEASE!!!!!!

20
04/01/11 08:31
big joe

i have a 1996 gmc yukon 4 wheel drive.There is a humming sound that comes when you turn the switch on and also when the vehicle is running.Its loud too.I think its the fuel pump.Could I be right?Please let me know.
21
10/04/11 10:58
G.W.N.
Thank author of this post/comment"big joe"

I am having the same problem now with my 96 Yukon, wondering if you

found a solution for yours?

22
03/20/12 19:40
Minneapolis
Thank author of this post/comment"1997 Yukon Fuel Pump / Relay sticking"

I have spent over a thousand dollars trying to fix this Yukon. It did not start last June and left my husband stranded at the gas ststaion, and we were out of town. We found a local mechanic and they said that it was the fuel pump, o.k. $750.00 later we get a new fuel pump and we get home. Next day it would not start, we called road side assistance and had it towed back to the mechanic and because we were out of town it was past free miles and we paid 130.00 to have it towed back to the mechanic, a week later we get the car back, and we were told that a new one was put in and a new relay as well, but were only charged for the relay. So when we first bought this used vehicle, I remembered that their were a bunch of relays in the console, so the mechanic told me the next time this happens, change the relay. So we went on a lil road trip last January this year in a snow storm with two Saint Bernards and the car died on us on I94 5 miles to Madison WI. we sat their for a few minutes and it started again, we got off the highway and went to a gas station, fueled up and it would not start, so I told my husband about the relays and we were back on the road again, got to Zion, IL. and back to Minnesota. Early February, i came home from the Dr.s and waiting for the hubby outside it died, I opened the hood and tapped the relay and it started, got back in the car and as soon as I shut the door it died again, again I opened the hood and tapped the relay got her running again, and as soon as I sat in the car and closed the door, Boom she died again, but this time when I opened the hood I smelled burnt wires, so enough was enough and we seen that the wire harness fuse junction box was cracked, so we assumed that that needed to be replaced, and had it towed to the dealer and they replaced the whole wire harness fuse junction box, and then they also did a lower intake gasket wrong and blew my motor..... I now have a new motor and just picked it up today and it is doing the same thing with the relay to the fuel pump. WTH is wrong with this fricken car, I have NEVER had so many problems with any other used car we have bought. It took me two months of my disablity checks to get the new motor, and after paying Luther Motors 1300.00 to do the wire harness fuse junction box and it's still doing the same thing.
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    GMC Yukon XL '1996 Yukon fuel pump?'