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Chevy Silverado and GMC Sierra Fuel Pump/Fuel System

333 messages,  Last post on Dec 03, 2009 at 12:13 PM

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What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Truck

#271 of 333 Re: Fuel Issue [yadi711] by bruce48532 Apr 21, 2009 (4:34 am)
Replying to: yadi711 (Apr 11, 2009 3:54 pm) Could also be the "fuel pump pressure regulator" same symtoms   I replaced this on my truck. It is located near the throttle body under the hood driver side on the top of the engine. There is a vacuum hose connected to it, if it has fuel in the hose when you pull it off, it is bad.   $60 apx   i can send you a pic showing the location if you email me, tdebatyahoo.com. too bad i cannot attached a pic on this forum">
#272 of 333 Paint issues by eug3 Apr 21, 2009 (4:00 pm)
My 2007 sierra has paint missing where bugs have hit only the plastic parts (ie) mirrors and bumper area. They will not cover under warranty. I have seen the same issue on a 2007 yukon. Anyone have this happen and did GM help?
#273 of 333 Re: '00 z71 hard starting likes its flooded. [bruce48532] by bsgb22a Apr 21, 2009 (5:46 pm)
Replying to: bruce48532 (Apr 21, 2009 4:17 am) I changed my fuel filter the last two times i have changed my oil. Still it fluctuate's back and fourth i hope its not my fuel pump. DO you think it could be the float in my gas tank getting stuck?? Replies to this message: bruce48532 (Oct 04, 2009 7:48 pm)
#274 of 333 Re: '00 z71 hard starting likes its flooded. [bsgb22a] by mickeymouse2 Apr 22, 2009 (9:48 pm)
Replying to: bsgb22a (Apr 20, 2009 6:24 pm) Your fuel guage is electrical. The guage itself is powered in the dash cluster and recieves a ground from the sending unit in the tank. As the float in the tank goes higher due to fuel level, the ground resistance is reduced (a better ground)moving your guage needle. Most likely cause is a mechanic didn't connect an extra ground that is found on GM's to the chassi good enough, or its dirty. On GM it is usually above the tank in front center and is either a clip or rivited ground strap. Simple test is to use a jumper cable and connect it to the metal part of the tank and the negative on the battery and see it this corrects the guage. If it does, you have a grounding problem with the tank. If it doesn't, the sending unit is usually what goes bad.
#275 of 333 Re: Fuel Issue [yadi711] by seafarmer Apr 29, 2009 (4:43 pm)
Replying to: yadi711 (Apr 11, 2009 3:54 pm) I got the dealership to replace my gauge cluster under warranty. There's a special recall on the fuel gauge cluster. It stemmed from a class action lawsuit. E-mail me seafarmerhotmail.com with an appropriate subject line and I'll send you a copy of the class action lawsuit. If someone can find a paste to post it for a good link that would be great for everyone's future reference.
#276 of 333 GMC Sierra 1500 5.7 Pickup HELLLPPPP!!! by ggreco0313 May 05, 2009 (2:11 pm)
I have a 88 GMC Sierra Pickup 5.7 and having a problem with power. On a cold start the truck runs fine, as soon as the engine warms up I have a loss of power. This is throttle body injection and can not figure out what is going on with the truck. This problem is also intermittent and doesn't also happen. I have had it looked at by 3 mechanics and they really dont want to spend the time to figure out the problem. They have tested fuel pressure and said it was fine, but I dont seem to believe they are correct. It feels like the truck is sometimes running on less cylinders, and sometimes when i give it throttle it stalls. This happens at a red light or while driving and accelerate. I am steering over thinking its the fuel pump(maybe there is crud on the inside of fuel tank) but im no mechanic. I would appreciate any help or suggestions if anyone else out there had a similar issue. Replies to this message: seafarmer (May 05, 2009 5:39 pm)
#277 of 333 Re: GMC Sierra 1500 5.7 Pickup HELLLPPPP!!! [ggreco0313] by seafarmer May 05, 2009 (5:39 pm)
Replying to: ggreco0313 (May 05, 2009 2:11 pm) Is this model equipt with a mass air flow sendor? This is a common problem with this age GM products. It's located on the air intake before the air filter. The test is a highly technical 'tap on it' according to Chilton's manual. If the engine sputters or dies, you've got it. Generally a $10's of dollars and 30 minute repair. Quite worth the check.
#278 of 333 98 gmc sierra driveshaft centre support bearing replace by johnboy60 May 17, 2009 (8:28 am)
how do i replace the centre support bearing if i don't have a hydraulic press?
#279 of 333 88 gmc sierra 1500 5.7L V8. by kevbad Jun 14, 2009 (1:16 pm)
takes a little bit to start up and when it is running is sputters like it wants to die. I think there is a problem with the fuel system. when i spray choke and carb cleaner near the TBI it runs normally, so i replaced the main gasket to no avail. then i proceeded to change the fuel filter. I am stumped please help...............
#280 of 333 fuel system problem on 88 GMC sierra 1500. 5.7L V8 by kevbad Jun 14, 2009 (1:21 pm)
engine sputters when running. the main gasket to the TBI was cracked so i changed it to no avail. then i changed the fuel filter with no luck either. I am stumped.... when carb and choke is sprayed to the outside of the TBI near the main gasket the engine runs fine as long as their is a steady spray. so I am stumped....HELP Please?

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