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Chevy Silverado and GMC Sierra Stalling Problem



  • I have a 1998 GMC Sierra ( 4.3 ) It also starts and idles fine , even in cold weather ... but after 6 - 8 miles.. it starts to bog down ... new fuel filter ... same result ... the fuel pump whines all the time ... but only runs 2 -4 sec. on key on ( normal ) some say fuel pump whine is not a problem run it till it quits ... others say after several miles fuel pump motor gets hot & falls in output pressure , like any elec. motor ... but it won't quit ... make sense ?????
  • Truck is finally running fine. After all the things I tried on it with no luck. I decided to try some gas treatment. I used seafoam in my gas and still no luck. So I tried it in my oil and I probably drove it 2 miles and suddenly the problem quit. I have not been able to recreate the problem since. Don't know if that fixed the problem but it's gone and thats all I'm worried about.
  • mikeusmcmikeusmc Posts: 1
    WOW thanks a lot i had no idea what it could be. I am a diesel mechanic so i am not so good with wires and censers crap. hopefully this will fix the problem.
  • I have a 2001 sierra 2500hd that has been stalling out over the last 4 or 5 weeks. 2 times already engine cuts out and then restarts itself, and the last time it took 5 minutes to get it to start after shopping. at first i thought it was a vapor lock, so i would open up the case cap, and then it would start, but now that doesn't even help. if i have gmc run diagnostic on it, will it bring up a traceble code for the crank sensor. even though gmc is having a recall on this problem, my vin number is not encluded, the local gmc dealer said they would put it on the computer, and if it brings up this code, that gmc said they will fix it as a good well, but if not i will have to pay,
  • padassopadasso Posts: 3
    Hi diesel106, Mine was the crank sensor. It went on for about 3 years. Stalling & stopping. Shut off key & restart. No traceable codes. Then it started stalling everyday & finally a code came on. They still didn't know for sure from the code but it hasn't stalled once since replacing the crank sensor. (Sept07 to present.) I have not heard about a recall. Mine is a 2002 GMC 2500hd with the 8100 engine. If you have any info on the recall please let me know. Thanks, Stu
  • i found the recall on the gm recall no. 06083, this one is for the 2001 sierra 2500hd 8.1, i'm not sure about 2002. hope this helps, and thanks for the information, mine hasn't started stalling everyday yet, but I am hoping the times it has that there is a traceable code so they will fix it under the recall.
  • hbjayhbjay Posts: 1
    i have a 2003 silverado 1500 v8 4.8l engine the other day it was running fine went to girlfriends house for couple hours then when i went to leave it started stalling on fine till i let off gas to stop or turn then it dies but can start the engine again with no problem and it will run till i let off gas new plugs ,wires and alternator but still does it.also no warning lights come on or nothing any ideas would be greatly appreciated thank you.
  • highflowhighflow Posts: 1
    I have an 03 Silverado with the 6.0l auto and recently have developed this problem. When I apply full throttle from a standing start and my speed increase passes 120kmh the truck acts like the fuel is shut off and dies. I usually have to sit on the side of the road for a few minuets before the truck will restart. No codes come up and Installed new fuel pump and filter. Does anyone have any suggestions.
  • drake75drake75 Posts: 3
    I have a 2003 gmc sierra 1500 4wd with 4.8L engine. My truck stalls more frequently when turning at low rpms but will also stall sitting at a stop. At a stop, the truck will surge before it stalls. I have been told it could be the fuel pump but I am not sure. Any ideas?
  • No trouble codes? Fuel pressure is a likely cause. Hook up a pressure guage and see if the pressure drops below 55psi during the stall. Other likely causes are an extreemly dirty throttle body, or a malfunctioning idle air control valve. Start with checking the fuel pressure, Vortec's are very fuel pressure sensative. Injecters will not spray fuel unless there is at least 55psi at the rail.
  • mo29mo29 Posts: 1
    I have a 93 chevy silverado and the other day was idling fine then the truck just died. I had a little trouble turning it back on. Drove fine the rest of the day. Next day drove it to work and on the corner turned off again. No warning lights come on but if you leave it off for a couple of hours truck turns on again but turns off when you drive it. Any help would be greatly appreciated.
  • i have a 94 silverado. it starts right up, runs great, but when i stop at a red light or stop sign, id stalls, sometimes it does this 10 times a day, others not once. i changed the fuel filter already and sprayed throttle body cleaner but didnt get to run it enough to see if the cleaner made a difference, any help would be greatly appreciated. thanks
  • jumlahjumlah Posts: 1
    I have a 1998 2500 sierra that I bought used.. Automatic. 256,000K I had the rad changed and the original manifold gasket changed at the same time a few months ago. After the work was done, I noticed a hesitation in the "power band" almost like the engine was misfiring. It was very subtle and easy to miss. there is no hesitation while moving up through the gears until I hit about 90 km/hr (3rd gear), this usually corresponds to about 2000 to 2500 rpm. after that when I reach about 100 to 110 km/hr, and the RPM drops to about 2000 RPM to 2200 RPM (Overdrive) and there is another hesitation. It happens no other time. there are no Codes or check engine light. I also notice after the work was done the engine runs at a lower RPM while idling, and sometimes when I am in reverse and begin to give the engine a shot of gas it almost stall out. It did at least once.

    I thought at first the mechanic may have messed up the timing so I brought it back. they double checked and everything was OK. They even checked injection ports and cleaned them. The problem continued, I took it to a transmission shop to see if it was a tranny problem, again no codes, the mechanic took it for a drive and was convinced that there was NOT a problem with the transmission or it's mechanical operation. The transmission was rebuilt about 76,000KM ago, and has only been on light duty. The transmission mechanic thought that it might be related to the ignition. Well, I don't know when the plugs were changed last and the truck has remote start that is no longer able to start the truck. The characteristic of the "hesitation" has not changed and continues to happen at the exact place and time while driving it.

    I am at a loss as to what is happening. I would rather not spend ton of money trying to find the problem. Since there are no codes it is kinda hard to pinpoint. I appreciate any assistance I can get on this matter.

  • A lot of miles on this truck. Here is what to look for. I understand mechanics have checked this, but maybe they over looked the obvious.

    Low idle than normal may be the key to this. Check fuel pressure, and throttle body for carbon build up. IAC (idle air control) valve may be malfunctioning and not setting a code(pintal may be stuck in wrong position) I have run into this after manifold has been removed. Pintal position will not set codes for IAC, only electrical malfunctions of the IAC will. Pintal spring may be coked with sludge, impeeding correct relearn proceedure. Recommend cylinder balance test. Verify each cylinder is contributing on its power stroke. If this vehicle was brought to me, this is where I would start.

    Keep in mind that my first rule to repair is to fix the obvious first, it might be related. I would focus on the low idle issue first. Even though timing has been checked, check it again by someone else. Timing cannot be accurately checked or set if your idle is below specs. Timing and idle are related. Your emission sticker under the hood will show the specs for timing at what idle rpm. Low idle retards timing, while a higher than normal idle advances timing.
  • lrichy3lrichy3 Posts: 1
    I have 03 sierra that i bought new, for the last year and a half it stalls when i come to a stop or turning. It runs fine when it is cold. After it warms up the rpm's drop down to about 550 and it has a miss. It's driving me crazy!! I put new plugs and wires on it,checked the fuel pressure. It's fine.Put new K&N air filter on,the throttlebody is clean. It does not have an IAC valve they only had them up to 02,it has one big electrical unit in the side of the throttlebody and nothing else!! ANY HELP WITH THIS I WOULD REALLY APPRECIATE IT!!!!
  • Hmmm, sounds like its starving for fuel only when warmed up. Check the output voltage signal from your upstream O2 sensors. They should be switching back and fourth between 600-900 mili volts within 1 second. If you don't know how to do this try a propane enritchment test. Take a propane torch(don't light it) and give your engine some extra fuel (propane) when it is warm and see if it smooths out. Just put the end of the torch into the air intake. If it runs worse, than your problem is too much fuel. Look for vacum leaks, and exhuast leaks, these will fool your O2's into sending a lean signal to the PCM wich inturn dumps extra fuel in there. Too much for the engine to burn up.
  • I was having the problems that some were having on here with the truck stalling at low rpm maneuvers. It wasn't the alt or battery, I put a new fuel filter on, still nothing, finally i got some cleaners and cleaned out the MAF sensors and the TB, by the way was loaded with carbon build up. I haven't have any luck with finding the IAC valve though, its not bolted on the TB like most, unless it is attached, meaning riveted on the TB, however since the cleaning it has ran fine, the test drive around the block was a success! If anyone knows where and how to get to the IAC valve shoot me an email, i really would like to clean that as well!
  • neelaviatneelaviat Posts: 2
    Hey, I have 2001 Chevy 2500HD Duramax w/ 200,000 plus miles.
    It's been a great truck, but... engine stalls when I use the turn signal to change lanes on the highway, or when coming out of a slow turn when the blinker arm returns. I can't duplicate this by wiggling the blinker arm. I have to put truck in N, and usually restarts first try. I can feel the truck hesitate or bump while changing lanes on the highway (70-80 MPH) if it doesn't stall completely. THANKS for any help. No codes being stored.
  • 2doorhoe2doorhoe Posts: 1
    had the same thing happen, replaced the harmonic balancer ran like new
  • neelaviatneelaviat Posts: 2
    Did you experience this while using the blinkers? Or @ idle? Thanks.
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