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Chevy S10 - GMC S15 and Sonoma Fuel Pump and Fuel System

49 messages,  Last post on Nov 16, 2009 at 1:02 PM

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#41 of 49 fuel guage doesn't work anymore by d_metivier Apr 19, 2009 (7:11 am)
i have a 2003 gmc sonoma crew cab ZR5 4x4. i was noticing problems with my fuel guage so i changed the fuel pump and sending unit out. well to my surprise it didn't fix the problem. whether the tank is full or empty, the guage reads empty and the fuel light is on 100% of the time. does anyone know a fix for this? Replies to this message: gonogo (Apr 20, 2009 6:56 am) oldiron (Jun 29, 2009 3:27 pm)
#42 of 49 Re: fuel guage doesn't work anymore [d_metivier] by gonogo Apr 20, 2009 (6:56 am)
Replying to: d_metivier (Apr 19, 2009 7:11 am) Don’t know if this will help but best I have. Full is 250 ohm and empty is 40 ohm. 2 wires come from the sender to pcm. 1 is ppl and other is orn/blk, orn/blk is ground. It goes to SP422 on LH frame rail behind cross member at transmission. Seeing you have empty tank I would trace the orn/blk first for loss of ground. Good luck
#43 of 49 Re: fuel guage doesn't work anymore [d_metivier] by oldiron Jun 29, 2009 (3:27 pm)
Replying to: d_metivier (Apr 19, 2009 7:11 am) Exact same problem on my 4 cylinder manual trans. I found a broken orange wire at a connector right along side the transmission. I think a stick or branch on the road may have cut it since the wire is very tiny. I repaired the wire and the fuel gauge works fine now.
#44 of 49 Re: ? [jdinin] by ridetrue Aug 14, 2009 (9:57 am)
Replying to: jdinin (Nov 26, 2008 4:45 pm) Well at this point we have changed the fuel pump, fuel filter, spark plugs, distributor cap, the spark plug wires, and a handful of sensors. Yet the problem remains for it. I have heard the cat might be the problem.
#45 of 49 Re: 2001 S-10 Fuel Gauge [littleosco] by madeupname4 Oct 10, 2009 (1:25 pm)
Replying to: littleosco (Dec 15, 2008 4:22 pm) yo man those sending units are not that expensive and they are very easy to replace. The whole unit including the fuel pump cost about 300 but if you look around online you can find one for about thirty dollars by itself, and I mean the floater of course for thirty dollars.
#46 of 49 fuel line connection leak by dmartn149 Nov 16, 2009 (1:02 pm)
#47 of 49 fuel line connection leak by dmartn149 Nov 15, 2009 (3:24 pm)
Is anyone out there familiar with Chevy's plastic fuel line connection. I had to be towed home the other day due to a huge fuel leak under the cab. I slid under there today and found the hose to the filter loose. I pushed it back on and it seems really secure. Should I get the connector replaced? Do they wear out? I had parked in some loose gravel earlier, and had a little traction trouble when backing out. Is it possible that a piece of gravel hit the connector just right to unplug it? I hope someone can offer some guidance, as it is my wifes truck, and now she is afraid to drive it. Thanks, Dan Replies to this message: gonogo (Nov 16, 2009 9:11 am) dmartn149 (Nov 16, 2009 1:02 pm)
#48 of 49 Re: fuel line connection leak [dmartn149] by gonogo Nov 16, 2009 (9:11 am)
Replying to: dmartn149 (Nov 15, 2009 3:24 pm) Buy a new filter, install the new filter using the plastic lock clip that comes in the filter kit for the plastic line end. Replies to this message: dmartn149 (Nov 16, 2009 1:02 pm)
#49 of 49 Re: fuel line connection leak [gonogo] by dmartn149 Nov 16, 2009 (1:02 pm)
Replying to: gonogo (Nov 16, 2009 9:11 am) Thanks. I didn't realize that the filters came with a new clip. I have only had the truck about 3mo. It seems tight now and doesn't leak, so maybe whoever changed the filter last time didn't get it plugged in all the way.

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