99 Tahoe Gas Gauge Shaking and Inaccurate Reading

Username	Mail: Vibrating fuel judge needle. (Topic#232327)
Wrangler Correspondent Posts: 137 Historic period: 59 Loc: Fundamental WA. land Reg: 03-29-07 User Info Send Individual Topic View Contour	12-26-09 07:13 PM - Postal service#1830939 I posted this some time agone (mebee a year agone) then forgot to cheque back and at present I can't find my original postal service then I gotta enquire again. The fuel guage needle on my '98 K 1500 has been vibrating for near six months at present. What I'm wondering is, is this but the sending unit going haywire or is this some kind of early alarm pointing to the impending fuel pump doom to come? I was only wondering if it "ways anything"!??!!! If information technology don't go, chrome it! Email Report

355Cheyenne Senior Member Posts: 3790 Loc: Northern MN Reg: 10-27-04 User Info Ship Private Topic View Profile	12-26-09 08:50 PM - Mail#1830978 In response to Wrangler the sending unit for that year is a big old module with the fuel pump and a board that is your fuel sensor. the board is breaking downwardly in the fuel. Unfortunately you tin can't buy the board and supervene upon but have to replace the whole sending unit. but information technology has no direct correlation as to the wellness of your pump... 98 Silverado k1500 4x4 350 Electronic mail Study
Da Burb Member Posts: 109 Historic period: 52 Loc: Melbourne, Commonwealth of australia Reg: 08-31-04 User Info Ship Private Topic View Profile	12-27-09 12:55 AM - Post#1831037 In response to 355Cheyenne Sorry...I disagree. Firstly....you can at present purchase the sending unit on its own. Secondly....it's more a case of the stepper motor in the guage going bad which is causing the needle to act whacky. I've replaced multiple pumps (complete modules) and my guage still acts like a Bustling Bird. Best wishes from 'Down-Nether'. Howard 98K1500, 4L80E, Whipple SC, Mercruiser Marine Intake, Hydroboost, 99+ 0411 PCM, Tuned by me with EFILive. Electronic mail Report
someotherguy Senior Moderator Posts: 29543 Loc: Texas Reg: 08-01-03 User Info Ship Private Topic View Profile	12-27-09 04:45 AM - Post#1831055 In response to Da Burb Aye; I've seen posts where people take replaced their pump/sender with new and that's when the problem started! With the integrated pump/sender assembly there is a 3 digit code and mention in the parts listings of an RFI filter; I've always wondered if the hummingbird needles were the effect of choosing the wrong code for the vehicle. Howard...I haven't seen the integrated style sender separately, tin can you provide some links to places that sell them? I've noticed that the pump sure looks like you lot can pop it out and supersede it (and I do believe I've seen people mail service that they have done this, maybe y'all likewise) - but last fourth dimension I needed to supplant one and I fought with the hoses that appeared to be somehow bonded to the pump, I simply said screwit since I had a '97 model pump and tank handy - and the quick-connects had already been hacked off the truck anyway past a previous owner. Richard 06 Silverado ISS / 06 Silverado SS / 06 300C SRT8 Email Report
355Cheyenne Senior Member Posts: 3790 Loc: Northern MN Reg: 10-27-04 User Info Send Private Topic View Profile	12-27-09 11:46 AM - Post#1831228 In response to someotherguy surprised to hear you guys say that. I have stock-still the described problem twice. once on my 98 and once on my 2000 venture by replacing the board on the sending unit of measurement. Although I could run across how the approximate could be bad. 98 Silverado k1500 4x4 350 Email Report
someotherguy Senior Moderator Posts: 29543 Loc: Texas Reg: 08-01-03 User Info Send Private Topic View Profile	12-27-09 12:fourteen PM - Post#1831239 In response to 355Cheyenne What I've read surprises me likewise; when someone says their fuel pump went bad and they supplant the whole assembly, pump/sender since it's the newer integrated unit, and And then the gas gauge trouble starts? With all make new parts other than the wiring and the guess, it's puzzling to me. Certainly in those scenarios information technology wasn't the wiring or the gauge since the trouble didn't be prior to the pump/sender change, correct? Richard 06 Silverado ISS / 06 Silverado SS / 06 300C SRT8 Electronic mail Report
Bill One thousand.b Senior Member Posts: 4517 Loc: upstate NY Reg: x-24-05 User Info Send Private Topic View Contour	12-27-09 01:28 PM - Mail service#1831278 In response to someotherguy The '99 van I sold a couple weeks back did that. What's odd is it didn't do it when I drove it home, and so subsequently I found the wires that went to a rear heater laying on the dash frame causing a short that gave me no dash lights and taped them up, it started with the vibrating. Those who can, do. Those who can't, criticize it on the net. Driving 2002 Express 2500 2002 Limited 2500 extended 1988 G20 conversion 1993 GMC 3500 dually Plus cars for swap and sale & aye, I one time tried a frame swap on a 51 Chevy. Email Study
355Cheyenne Senior Fellow member Posts: 3790 Loc: Northern MN Reg: x-27-04 User Info Send Private Topic View Profile	12-27-09 05:04 PM - Post#1831388 In response to someotherguy x-iv Richard. Makes me wonder now to, because the ii vehicles I stock-still before that did this had the sending unit replaced at some point, and I went to the junk yard and got factory boards and spliced them in which solved the issue... 98 Silverado k1500 4x4 350 Electronic mail Report
Wrangler Contributor Posts: 137 Historic period: 59 Loc: Central WA. state Reg: 03-29-07 User Info Send Individual Topic View Profile	12-27-09 07:11 PM - Post#1831464 In response to 355Cheyenne Wow, seems to be some interesting things going on in our fuel tanks. If it don't go, chrome it! Email Study
someotherguy Senior Moderator Posts: 29543 Loc: Texas Reg: 08-01-03 User Info Send Individual Topic View Profile	12-27-09 07:19 PM - Post#1831469 In response to Wrangler It'due south true; in that location'south some weird, wild stuff going on but while we contend near what'due south causing information technology, you tin can at least be reassured that it's not direct tied to the pump itself, so not to worry. Richard 06 Silverado ISS / 06 Silverado SS / 06 300C SRT8 Email Report
Wrangler Contributor Posts: 137 Age: 59 Loc: Central WA. state Reg: 03-29-07 User Info Transport Private Topic View Profile	12-28-09 07:49 AM - Post#1831659 In response to someotherguy Cool! If it don't become, chrome information technology! Electronic mail Report
4_Speed_Dave Senior Fellow member Posts: 550 Loc: Southington, CT, USA Reg: ten-26-02 User Info Send Private Topic View Profile	12-28-09 05:00 PM - Postal service#1831948 In response to Wrangler It isn't the fuel tank sending unit of measurement. I have an Aux in bed fuel tank with sender. I can switch betwixt ii tanks with two pumps and different fuel level sending units depending on what tank I am using at the time. The fuel gauge does the aforementioned thing no matter what tank I am using. Information technology is in the guauge on the dash not the sending unit of measurement in the pumps. I tin switch dorsum and forth on the fly and the gauge will read the level in the tank I'm on and will nonetheless be flickering around. Dave 4 Speeds Forever!! 69 Nova , Jerico DR-4 Ford 9" / 5.00's Dave'south 69 Nova Email Report
Da Burb Member Posts: 109 Age: 52 Loc: Melbourne, Commonwealth of australia Reg: 08-31-04 User Info Send Individual Topic View Profile	01-03-10 11:06 AM - Post#1835249 In response to someotherguy Sorry it took a while. http://cgi.ebay.ca/NEW-FUEL-LEVEL-SENSOR- SK1003-xix... Best wishes from 'Down-Nether'. Howard 98K1500, 4L80E, Whipple SC, Mercruiser Marine Intake, Hydroboost, 99+ 0411 PCM, Tuned by me with EFILive. Electronic mail Report
someotherguy Senior Moderator Posts: 29543 Loc: Texas Reg: 08-01-03 User Info Transport Private Topic View Profile	01-03-10 eleven:38 AM - Post#1835262 In response to Da Burb Cheers for the link Howard; dainty to see it'due south a real deal Ac Delco part. Wish they'd put a picture of the bodily item instead of just the box - I'm guessing it's the "plastic trash can" just minus the pump? I'd also guess if they have it available for the SUV's it must be available for the trucks, too? Richard 06 Silverado ISS / 06 Silverado SS / 06 300C SRT8 Email Written report
355Cheyenne Senior Member Posts: 3790 Loc: Northern MN Reg: ten-27-04 User Info Send Private Topic View Profile	01-03-10 04:49 PM - Post#1835438 In response to someotherguy non to stirr the waters her only I was showing a friend this thread on my phone and he has been a gm service tech for almost 20 years, currently the service manager and he says whenever they exercise a service on a newer vehicle with this issue is has been a sending unit and that he thinks varnish builds up on the sensor pins that ride the board. he thinks if the problem happens after a new sending unit of measurement that it was lacking. I am just proverb what a guy with experience thinks... You are welcome to disagree. I have no proof on paper and so I cant back it up. 98 Silverado k1500 4x4 350 Email Report
Da Burb Member Posts: 109 Age: 52 Loc: Melbourne, Australia Reg: 08-31-04 User Info Ship Private Topic View Contour	01-04-10 02:55 AM - Post#1835671 In response to 355Cheyenne This is the pic I found...which apparently goes with this unit. As for GM tech's....I take little faith in them...but it may simply be here. All-time wishes from 'Down-Under'. Howard 98K1500, 4L80E, Whipple SC, Mercruiser Marine Intake, Hydroboost, 99+ 0411 PCM, Tuned by me with EFILive. E-mail Report
355Cheyenne Senior Fellow member Posts: 3790 Loc: Northern MN Reg: x-27-04 User Info Transport Private Topic View Contour	01-04-ten 05:45 AM - Mail service#1835717 In response to Da Burb Well just to recap here, the office you are showing here is the part you are proverb is not going to fix the trouble, and this is what I am maxim is the problem. Just desire to make certain we are talking the same thing. 98 Silverado k1500 4x4 350 Edited by 355Cheyenne on 01-04-10 05:47 AM. Reason for edit: No reason given. E-mail Study
someotherguy Senior Moderator Posts: 29543 Loc: Texas Reg: 08-01-03 User Info Send Private Topic View Contour	01-04-ten 07:06 AM - Post#1835752 In response to 355Cheyenne Howard - OK, so no trash tin can, just quite literally the sender itself. 355 - I'chiliad not debating what your tech friend is saying. I haven't tried to troubleshoot 1 of these myself yet. The last ane I had that did it was my '96 GMC which I sold several years ago, and information technology wasn't bad enough to carp me. (Well, the '98 3500HD I drove for work did it too but my boss was a total cheapass and would never spend coin on something that wasn't completely cleaved and keeping the truck from moving.) Simply going from what I've seen others post, it seems similar it began for some people after they replaced the pump/sender assembly, and to a betoken I just might agree with your tech friend that information technology may accept been the wrong sender. Since at that place'southward the 3 digit code that seems related to the RFI filter or whether it has i, I tin can see how someone might go the wrong sender. Richard 06 Silverado ISS / 06 Silverado SS / 06 300C SRT8 Electronic mail Study
355Cheyenne Senior Fellow member Posts: 3790 Loc: Northern MN Reg: ten-27-04 User Info Send Individual Topic View Profile	01-04-x 08:33 AM - Post#1835793 In response to someotherguy Richard, No problem, I don't want to steer any one in the incorrect direction either and I could see how information technology could exist at the gauge side. Now my feel, I accept fixed ii vehicles with this problem by replacing the part he showed in a higher place, that sensor (sending unit of measurement) and I have a GM mechanic that says he has washed a million(exaggerated) with the same method. And so I gauge I am just going off my feel and gut feeling, But results always vary and I will admit I am often wrong. I respect anybody'due south opinion equally long as they take a valid point. Da Burb has a valid point as do y'all and so I am not saying anyone is wrong, merely but feel that my experiences lean me in another direction. 98 Silverado k1500 4x4 350 E-mail Report
Da Burb Fellow member Posts: 109 Age: 52 Loc: Melbourne, Australia Reg: 08-31-04 User Info Send Individual Topic View Profile	01-04-10 10:thirteen AM - Mail#1835845 In response to 355Cheyenne Simply for the sake of information technology....here's the advert for the in a higher place motion picture. http://cgi.ebay.ca/FUEL-LEVEL-SENSOR-KIT- SUBURBAN-... True...I don't believe this detail will fix the problem. Information technology may set up a 'jumpy' needle issue...but not the 'hummingbird' syndrome. Best wishes from 'Down-Under'. Howard 98K1500, 4L80E, Whipple SC, Mercruiser Marine Intake, Hydroboost, 99+ 0411 PCM, Tuned by me with EFILive. Email Written report