Fueling & Injection - 98 ls1 fuel level sender question

i'm a little on the fence and need some help.

my fuel level sensor is bad, as is my fuel pump. the check valve in the pump is bad, pressure and volume are low.

i have full bolt ons and a Fast92/NW92 setup and plan on H/C swap soon so i should be beyond or at the limit of the factory pump. i'd like to install a racetronix F98 performance pump and wiring kit but then i'm still without a working fuel gauge, or i could buy a complete aftermarket fuel pump module with sender but would still have to upgrade the pump.

so i'm basically wondering if there is ANY way to replace the sender without buying a complete module. i'm having no luck.

same thing happended to me......i have a 98 and bought the racetronix pump and harness from lonnies for 200.....i then had to go to the dealership for the sending unit.......hard to find piece.....actually was cheaper than i thought at 150, but had to get it from an out of state dealership

how long ago was that? i have found the delco part number and SOME online retailers show it in stock but do not give a description nor show a picture, just a part number with a price, so i am worried its not the right part.

if i can find the sending unit i'd rather do it that way to get the upgraded pump, and end up being cheaper than an aftermarket module at the same time.

DO NOT GET A PART LIKE THIS FROM GMPARTSGIANT OR GMPARTS DIRECT!!!!!! these sending units are hard to come by and those two websites do not guarantee accuracy....plus if it was wrong, i heard it is nearly impossible to contact someone for a refund.......i did this a year ago.......call your local dealer....then theycan tell you which dealer in the US has it

thats why i asked how long ago it was. it almost seems obsolete as an individual part, yet SOMEONE has to be manufacturing them since they come on every delco and aftermarket fuel pump module.

i might just pull the assembly this week and see if i can repair it. most likely just build up on the contacts or play in the hanger. occasionally i get a good reading, but normally not.

Can anyone post a GOOD photo if the the 98 fuel sending unit.
I am familiar with the 4th gen fuel pump module but not the 98. What ohm is the 98 fuel level sensor.

i can post pictures later today.

thats why i asked how long ago it was. it almost seems obsolete as an individual part, yet SOMEONE has to be manufacturing them since they come on every delco and aftermarket fuel pump module.

i might just pull the assembly this week and see if i can repair it. most likely just build up on the contacts or play in the hanger. occasionally i get a good reading, but normally not.

just call the dealer like i did and tell them that u need a fuel sending unit...they canget u one

thats the plan, just didnt have time today.

talked to several local GM dealers today and ALL of them say this part is discontinued, and no longer available through them.

so i fixed my fuel gauge today, FINALLY. and it was actually VERY simple.

i am a full service automotive tech for a living, so i literally do a half dozen GM fuel pump modules a week some weeks, and have a ton of them laying around. i noticed a BUNCH of them had the same attachment setup as my cars sending unit (the way it attaches to the module), so i started checking the resistance of a few of them and found one that was appr. 50ohms empty and 260ohms full (what the original one is supposed to be). this particular one was identical to my OEM one with the exception of the float arm and the connector. the sender was originally from a 1999 pontiac sunfire, and apparently there is an aftermarket (dorman) replacement part for these so they are readily available.

making it fit my module was easy since it mounted the same, so i cut the plug and soldered my plug to it (you cant wire it wrong) and stuck my float arm in the sender and thats it, perfectly working fuel gauge.

i went the extra step and diagnosed mine and found the contacts no longer mating to the strip because of excessive free play in the float arm bushing, so when the float arm was flexing it was pulling the contacts away from the strip. bent the contacts back into the strip and it worked flawlessly but with the bushing flex i decided to keep the sunfire sender in because it had no flex. i did use a pencil eraser to clean the contact strip surface of any buildup even though it was working fine, i figure it could only help.

i can now order a racetronix or walbro pump!!!!!!

hope this helps someone else.

Did you take photos?

no i'm not the type of person to take pictures and do a write up and all that stuff. i just like to get things done.

really is no need for pictures though, if you are competant enough to get the module out the tank you should be able to solder or atleast butt connect 2 wires and swap a float arm.

i'll report back after i get through a full tank to make sure the sweep is fine across the entire gauge.

Racetronix has a l99 for 99-02 fuel level sender for $50 looks just like the 98 but the ohms read the same but go the clock wise or counter clock wise to the 98. Wouldn't switching the two wires around fix this? If not can someone explain I don't want to pay $300 for a hole sending unit

Racetronix has a l99 for 99-02 fuel level sender for $50 looks just like the 98 but the ohms read the same but go the clock wise or counter clock wise to the 98. Wouldn't switching the two wires around fix this? If not can someone explain I don't want to pay $300 for a hole sending unit

We already explained to you in an e-mail that switching the wires will not work. It is a resistor not a diode or battery. The only solution is to be able to change the direction so that the resistance goes up and down in the proper direction.