You are here: Forums Pickups Chevrolet Silverado & GMC Sierra Chevy Silverado and GMC Sierra Fuel Pump/Fuel System

Chevy Silverado and GMC Sierra Fuel Pump/Fuel System

337 messages,  Last post on Dec 08, 2009 at 9:01 AM

You are in the Chevrolet Silverado & GMC Sierra Forum. Your Host is kcram

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

#171 of 337 fuel pump fixed by rickbritt Mar 22, 2008 (5:58 pm)
Fixed fuel pump in unusual way. Have a 99 GMC Sierra 1500. Found this website. http://www.myhonestmechanic.com/articles/1999-Nissan-Maxima-engine-wont-start.sh- tml We replaced the fuel filter and then did what it said and it worked   "If the engine turns over and over but won’t start...I would have someone bang on the bottom of the fuel tank with a rubber hammer or block of wood AS you crank the engine over. This can help kick start a weak fuel pump. If you still can’t get it to start...you will need a mechanic and a tow truck I am afraid. There is not much a do-it-yourselfer can really do these days without the proper tools and manuals."   Hope this works for someone else too. It saved us over $300.
#172 of 337 Re: fuel pump problem?? [elamcup] by muddhopperz71 Mar 23, 2008 (7:19 pm)
Replying to: elamcup (Mar 20, 2008 11:04 am) yea, I ended up changing all the fuses and added another gallon of gas and it fired right up and is running really good now.
#173 of 337 Possible fuel pump problem by hydro28 Mar 24, 2008 (12:52 am)
I have a 2002 gmc sierra with a 4.8. It idols rough, it's worse when the engine is cold and spits and sputters when you try to take off. The check engine light is on i took it to auto zone and they first thought it was the mass air flow sensor so i replaced that with no luck. and then they said it was probably the fuel pump. so i replaced the fuel filter and it ran good for a few hours and then went to back to the same as before. Do you think that it is the fuel pump? Replies to this message: obyone (Mar 24, 2008 12:54 pm) muddhopperz71 (Mar 24, 2008 4:51 pm)
#174 of 337 Re: Possible fuel pump problem [hydro28] by obyone Mar 24, 2008 (12:54 pm)
Replying to: hydro28 (Mar 24, 2008 12:52 am) Sounds like it could be your IAC Idle Air Controller. If it's dirty that would probably your culprit.
#175 of 337 Re: Possible fuel pump problem [hydro28] by muddhopperz71 Mar 24, 2008 (4:51 pm)
Replying to: hydro28 (Mar 24, 2008 12:52 am) I had the same kinda problem but it was when the engine was warm. I would have to tap the gas peddle to get the truck to start but if i hadnt drove it for awhile it would start right up. I just changed my fuel pump and it is running great now. The fuel pump cost me 280.00 and I put it on my self with no prob.
#176 of 337 1999 CHEVY TAHOE FUEL PUMP ISSUES by az32guy Mar 27, 2008 (5:57 am)
I have now had 3 fuel pumps in the last 15,000. The OEM fuel pump was replaced with a FG0089 modular fuel pump sending unit. 6 months later it failed and was replaced with a FG0089. 8 months later this one failed and was replaced with a FG0089.   Just 10 days after the 3rd fuel pump was installed the Tahoe turned over but failed to start. After being towed to the shop and the shop tries to start the Tahoe and it starts.   Now I am going crazy I need the vehicle to work.   I do some checking and find there are 2 fuel pumps for 1999 Tahoe's the FG0089 and the FG0090. My VIN # states my vehicle had the OEM FG0090. The shop says there is no difference and they will not replace the current FG0089 because it is testing 58 psi pressure.   What can I do? Replies to this message: mickeymouse2 (Mar 27, 2008 7:14 am)
#177 of 337 Re: 1999 CHEVY TAHOE FUEL PUMP ISSUES [az32guy] by mickeymouse2 Mar 27, 2008 (7:14 am)
Replying to: az32guy (Mar 27, 2008 5:57 am) Sorry about your frustration. To my knowledge, both pump assemblys are the same with an exception of a hose. One is for California emissions and one for Federal. I would focus more on troubleshooting the problem, either pump should work fine.   With this many pump replacements, I think the diagnosis is wrong. Just for info a poor ground to the pump will cause it to go bad early, and also give a false impression of a bad pump. Ground is skipped during checking by fellow techs most of the time. Recomend checking to see that all small ground straps near battery, engine compartment, and chassi have good connection and havent been removed due to some other repair.   Let me explain what has to happen in order for your pump to come on. I will explain it in slow motion because it happens quickly.   When you first turn your key to on (run position) not to the crank position yet. Your pump gets a 2 second prime to pressurize the system. Power from the PCM trips your fuel pump relay for 2 seconds. When your switch reaches the crank position and the PCM see's that the engine is trying to start, it trips the relay again to turn on the pump. If a ground signal from the oil pressure swich is not noticed in 2 seconds, the PCM will turn off your pump.   So this is what has to be done to diagnose this; If it doesn't start but cranks, and the pump isn't coming on. Verify power and ground to the pump. Power wire is usually grey, and ground is usually black in color. Use a digital volt meter or equivalent and hook it to the power wire to the pump and turn the key on. You should see near battery voltage on that wire for 2 seconds. Same proceedure for ground. If both check out, and pump still isn't coming on, bad pump. If there is a ground or power failure then there is some other issue. With this many pump replacements, I suspect a poor grounding some where.
#178 of 337 Chevy fuel pumps by jeffsayers Mar 28, 2008 (4:46 am)
BOO to Chevy for all these darn fuel pump problems. Granted, not every post is truly a problem with this unit, but the failures are widespread.   I have been getting lazy in my years, and all I can say is that I am glad I paid the dealership to replace mine because parts and labor are guaranteed for life. And it's a darn good thing I did because I need to take it in AGAIN! You would think they would put in a sound replacement when their profits are on the line! Replies to this message: mickeymouse2 (Mar 28, 2008 5:42 am) obyone (Mar 28, 2008 8:38 am) az32guy (Mar 28, 2008 10:22 pm)
#179 of 337 Re: Chevy fuel pumps [jeffsayers] by mickeymouse2 Mar 28, 2008 (5:42 am)
Replying to: jeffsayers (Mar 28, 2008 4:46 am) I don't know of any OEM part that is garanteed for life. I also question a life time garantee that includes labor. I suggest you read the fine print. Dealers garantees are usually anywhere from 90 days to one year parts and labor. After market pumps sometimes have a live time warranty. However, I did try a warranty one about a month ago on a customers car and the manufacturer is no longer in business.
#180 of 337 Re: Chevy fuel pumps [jeffsayers] by obyone Mar 28, 2008 (8:38 am)
Replying to: jeffsayers (Mar 28, 2008 4:46 am) Fuel pumps aren't the only problem. Has your window motor blown yet? I see more window problems than fuel problems. I guess GM must agree since they no longer sell the motor and assembly together. To save on warranty costs they are now individual units.

You are here: Forums Pickups Chevrolet Silverado & GMC Sierra Chevy Silverado and GMC Sierra Fuel Pump/Fuel System