Tip for fuel guage problems. - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-06-2005, 07:59 PM   #1
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Default Tip for fuel guage problems.

My guage has been doing that "You're on the gas so you have a full tank, oh wait now you're braking so it'* empty" thing for a while. So I was looking into where the sender grounds. G403 and G102. G102 was easy enough as it'* on the lower bolt of the ICM bracket. But cleaning that didn't fix it. After about 10 minutes flipping pages in the FSM I found G403 in the back of the car. If you open the trunk and look in there, Up under that wavy plastic peice on the back of the seat, over on the passenger side, You'll notice G403 as the only wire terminating with the rest of them going through the floor there at P403. I cleaned G403 and my guage is perfect.
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Old 08-07-2005, 03:52 AM   #2
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Thanks, Dame, for the tip. Every little bit helps.
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Old 08-07-2005, 10:20 AM   #3
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Dame...very good info. Can you please describe the location of G403 a little more for us. I couldn't really figure the exact location and this sounds like a big one for many people.
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Old 08-09-2005, 03:38 AM   #4
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Okay.

On the passenger side of the trunk, on the floor. About 4" from the strut tower.

The back of the seat is covered by that plastic sheet, where it meets the floor of the trunk it has kind of a wavy profile. Flip that up and it'* right there. You could literally stick your hand through the seat and touch it.

It'* one of those blade type connections. There'* about 20 other wires going through the grommet there (P403) to power the fuel pump and things.
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