Fuel tank senders
Thread Starter
Racer
Joined: Aug 2002
Posts: 417
Likes: 1
From: Florida
Fuel tank senders
Has GM had a recall or a fix for the sending units on some of the C-5s
My car (2002 C-5 )continues to act retarded even after switching to Amoco (BP) 93 octane and using one bottle of techron + one tank og gas then one bottle of Red Line fuel system cleaner + another tank of gas. The another bottle of Red Line fuel system cleaner + another tank of gas.
My car (2002 C-5 )continues to act retarded even after switching to Amoco (BP) 93 octane and using one bottle of techron + one tank og gas then one bottle of Red Line fuel system cleaner + another tank of gas. The another bottle of Red Line fuel system cleaner + another tank of gas.
Drifting
Joined: Mar 1999
Posts: 1,760
Likes: 12
From: Clemson, SC God's Country!!
Cruise-In I Veteran
I don't know if you are having a probelm similar to mine but when I first start my C5 the gauge reads lower than what I know is in the tank, when its full it reads 3/4, when its 1/4 full it reads almost empty. After driving for about 15 minutes if comes back to normal. Is this the same problem you are having?
I don't know about recalls but I am going to talk to my Chevy dealer later today and will let you know what I find out.
I don't know about recalls but I am going to talk to my Chevy dealer later today and will let you know what I find out.
Last edited by Vettin Man; Mar 25, 2005 at 10:24 AM.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
There are TSB out there that explains the whole bag of worms but NO recalls!! 
Here is something that you can check for free! Examine chassis ground G-401 It is in the rear drivers side wheel well. If you look in between the tire and rear side of the fender wheel you will see a ground stud. This is the ground connection for the sending unit! It gets very dirty and corrodes easily! Use lots of WD-40 and be careful not to break the stud off. if you do it fixable!
Been there!!
Here is a picture of the ground connection! (As you can see, mine broke off and it is replaced with a self tapping screw!
)
Remove the eyelet and clean the frame, eyelet and stud with a wire brush.
See if that solves the problem!
BC
Here is something that you can check for free! Examine chassis ground G-401 It is in the rear drivers side wheel well. If you look in between the tire and rear side of the fender wheel you will see a ground stud. This is the ground connection for the sending unit! It gets very dirty and corrodes easily! Use lots of WD-40 and be careful not to break the stud off. if you do it fixable!
Been there!!Here is a picture of the ground connection! (As you can see, mine broke off and it is replaced with a self tapping screw!
)Remove the eyelet and clean the frame, eyelet and stud with a wire brush.
See if that solves the problem!
BC
Instructor
Joined: Feb 2004
Posts: 235
Likes: 13
From: Raleigh NC
Retard.........
I got my recall notice when GM 1st called for it in my '99. By then, I was having problems. The new sending units didn't help. Soon after replacing, they went back to the usual. Mines would crash near empty after lowering pass 1/2 tank. I made sure all codes were cleared. Even thou they're cleared in the DIC, they may still be there. The reason why I say that, I would plug my Programmer in & it would bring them up. So, I believe the computer sort keeps a history still.
I started using Chevron TechRon concentrated Exclusive Synthetic Formula(120z), resolved my problem. I started by using 1 once a week & backed off to once every 2-3 weeks after a month. No problem since. It's been over 2yrs. My approach was more agressive cause I fill up at once a day or more depending on how I drive.
The other cleaners didn't help what so ever. I don't know why Chevron works, but I've tried others with plus w/o synthetic & they just didn't work. Synthetic works best.
I started using Chevron TechRon concentrated Exclusive Synthetic Formula(120z), resolved my problem. I started by using 1 once a week & backed off to once every 2-3 weeks after a month. No problem since. It's been over 2yrs. My approach was more agressive cause I fill up at once a day or more depending on how I drive.
The other cleaners didn't help what so ever. I don't know why Chevron works, but I've tried others with plus w/o synthetic & they just didn't work. Synthetic works best.
Melting Slicks
Joined: Jul 2003
Posts: 3,427
Likes: 2
From: Fountain Inn, South Carolina
I just started having this problem at 60,000 miles and 6 years 
I guess I'll start by checking the ground... as I am sound proffing the wheel wells this weekend. I'll see if that corrects my problems.
I guess I'll start by checking the ground... as I am sound proffing the wheel wells this weekend. I'll see if that corrects my problems.
