Edmunds.com | Inside Line | Auto Observer Your Account | Help | Directory
You are here:
![[F]](http://a332.g.akamai.net/f/332/936/12h/www.edmunds.com/media/townhall/webxicons/site.gif){kind=small}
Forums
Pickups Chevrolet Silverado & GMC Sierra Chevy Silverado and GMC Sierra Stalling Problem
73 messages, Last post on Oct 29, 2009 at 8:44 PM
You are in the Chevrolet Silverado & GMC Sierra Forum. Your Host is kcram
|
Replying to: 45chrome (Dec 20, 2007 7:20 pm) |
|
|
|
Does anyone know what the problem is when the truck stalls at idle, slow speeds or turning. I have heard that new and old trucks have this problem. It doesn't do it all the time. 
|
|
|
|
|
Replying to: chevellessman (Dec 22, 2007 8:20 am) |
|
|
Replying to: bill1971 (Dec 20, 2007 12:51 pm)
|
|
I own a 1998 GM Sierra 5.7L 2wd automatic. My truck intermittently stalls while idiling, city speeds and at highway speeds. The idle stall has started in the colder months ( I live in Canada). I can start the engine right away and it runs perfectly until the next time it stalls. Immediately after the stall my transmission will shift hard going from second to third gear. I have had this checked out by the dealer ship (GM Goodwrench) and it is a faulty Pressure regulating valve (PRV)in the transmission that is faulting. However when I turn the engine off for thirty seconds than start it, the hard shift disappeears but the code remains. The dealership has replace the valve three times and have no idea what is causing the stall. The relevant service history is as follows. Aprill 2007, brought truck in for service and inspection, dealership repaired/replaced the folowing relevant items 1)transmission oil and filter change and flush 2) replace fuel filter 3) changed oil and filter 4)replaced spark plugs, 5)performed semi annual inspection 6)replaced lower intake gasket 7) replaced water pump 8)coolant system change and flush. April 2007, Stalling ocurrred at highway speeds (first time), diagnosis was faulty PRV and repaired. Stalling contiuned intermittently after replacement. August 2007, Brought truck into dealership and they figured it was a weak fuel pump and was replaced, September 2007 stalling of engine continued. NOV. 2007 dealership replaced ignition harness, and stalling continued. Dec. 2007 I replaced the battery and did a thourough cleaning of the battery terminals. Stalling continues and now more often when idling, warm or cold. During idling the engine sputters and surges before it stalls. The dealer ship figures that the stalling and the PRV are two seperate issues. The only code that comes up is the faulty PRV. My local goodwrench service dealer has no idea what may be causing the problem and I am tired of paying them not to fix the problem. Can you give me any ideas of what may be at fault. I realize that there could be many components at fault but would like to know where to start troubleshooting. Sorry for the long rant, more info better than none.
|
|
|
|
|
Replying to: dan125 (Jan 07, 2008 8:58 pm) I have run into this before on a few customers vehicles. Same issue, been to the dealer, numerous things replaced. On that vehicle it was a faulty alternator. Yes, it was charging fine, but the AC voltage was leaking through the regulator and confusing the PCM. Most technicians don't have the test equipment for this test. However, with your problem I would suspect faulty grounds to the transmission and or PCM first. Add some extra ground straps to the chassi, transmission ect. Next, if that doesn't work, disconnect your battery. On the back of the alternator, disconnect the B+, thats the fat 8 gauge cable leading eventually to your battery. Wrap the end of the cable with tape to prevent a short. Unplug the plug on the back of the alternator also. Reconnect the battery and run the engine and see if the problem goes away. Of course the check engine light will come on about the alternator being disconnected. It won't be charging so you cant run it more than 10-15 minutes, but its only a test. If this fails, reconnect everything. Borrow a scan tool from auto zone, and drive around with it plugged into your DLC port. If the problem goes away now, there is a grounding problem with the PCM itself. If this is the case, it is very difficult to trouble shoot. Let me know how it works out. Good luck.
|
|
|
Replying to: mickeymouse2 (Jan 08, 2008 5:46 am)
|
|
I have a 93 Silverado 1500 5.7L. My problem is that the engine wants to surge at low rpm's. It idles fine and runs fine after you get it going. I have already replaced the plugs, wires, distributor cap, ignition coil, rotor button, pcv valve, and fuel filter. Any help would be greatly appreciated.
|
|
|
|
|
Replying to: jchase1 (Aug 06, 2007 10:31 am) |
|
You are here:
Forums
Pickups Chevrolet Silverado & GMC Sierra Chevy Silverado and GMC Sierra Stalling Problem
New? Join Now!
Forum Tools
Search Forums
Browse by Vehicle
2010 GMC Sierra 1500
Browse by Board
Browse by Topic
Today's Chats
