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Chevy Express/GMC Savana: Starting/Stalling Problems

45 messages,  Last post on Oct 27, 2009 at 5:40 AM

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What is this discussion about? Chevrolet Express, GMC Savana, GMC Savana Cargo, Van

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#36 of 45 Re: Vans that start and then fail [speedzone3] by lmfh Jan 05, 2008 (3:05 pm)
Replying to: speedzone3 (Dec 10, 2007 9:35 pm) Sorry speedzone3, but we have not even tried to fix it. We understand the PassLock system is messed up somewhere along the line, but to check everything in the system at a dealership would cost way too much time and money for us too. This article explains the problem and all the points where it could go wrong and it made my brain hurt to think of the possibilities for loss of contact, corrosion, etc. We use our van as a family vehicle and a Scout Troop vehicle and have just gotten used to the idea that we go turn the dumb van on 15 minutes ahead of time. We have 156,000 miles on it and like most Savana vans, it's still going strong except for that stupid PassLock security system issue. Hope you find a solution to your problem since it's your livelihood on the line. Good Luck. Replies to this message: speedzone3 (Jan 05, 2008 9:28 pm)
#37 of 45 Re: Vans that start and then fail [lmfh] by speedzone3 Jan 05, 2008 (9:28 pm)
Replying to: lmfh (Jan 05, 2008 3:05 pm) You mentioned an article that explains the problems and points. Is this anything you can email or fax? Please email if possible.
#38 of 45 Express van won't start = FIXED! by amsoil314802 Oct 16, 2008 (6:34 am)
my company van would not start. few minutes later van started. took to nearest garage and noticed SECURITY light was on dash. garage owner said key and/or key ignition cylinder is worn so computer thinks i'm trying to steal van so computer cuts off fuel injectors. went to dealership but their computers were down so i could not get new key. took a chance with backup key. later that evening van would not start AT ALL and i was stranded. got tow back to house. later installed NEW ignition key cylinder AND NEW key cut from van VIN code from dealership. turned key to run position and let sit for at least 20 minutes so computer could re-calibrate to new key/cylinder. van starts up and runs fine. hope that helps!
#39 of 45 Re: Won't Stay Started [vhazel] by wheelman1952 Oct 17, 2008 (7:07 pm)
Replying to: vhazel (Sep 25, 2006 4:01 am) i have a 1996 chevy exspress van.i have had a hard start problem for over a year and a half..last summer,a gm dealer tried to pull that crap.about it being the fuel pump.i did not go along with that.found out that my battery post.was shorting.cleaned and reinstalled.but now right after,the summer draught.when it started raining,my van started the deal.when it gets wet.it does not want to start.well i park now where the front,end is on dry ground,it started today in the rain.the crank trigger is up front.on the crank shaft.the wires are good on mind.but what else could it be.a sensor.some where.there are wheel sensors,transmission speed sensor..park the front on dry ground,no grass.
#40 of 45 Intermittent fuel pump by motownturns50 Apr 09, 2009 (5:03 am)
I have a '99 Savana 4.3 with a fuel pump that works intermittently. When it works, it pumps like a fire truck, but most of the time it's dead. My fuel gauge corresponds to the fuel pump. If my gauge is working, so does the fuel pump. If the gauge doesn't come off "E", the fuel pump doesn't work. Generally, after sitting, the gauge/pump combo is more likely to work. I would like to condemn the in-tank fuel pump/gauge assembly and replace it, but I can't because it could be something farther up the electrical chain and $300 is too-expensive of a trouble shoot. Any ideas?
#41 of 45 problems by 1320jon Apr 09, 2009 (1:26 pm)
motown, your problem almost certainly is in the tank. The only common between is the ground. You may not even need a new assembly. If you do, the pump should be about 100$, and the fp sending unit is probably good. You would more then likely accidentally fix the bad ground by replacing the pump. The pumps are pretty easy to do once the tank is almost out of fuel. The assembly unbolts from the top with 8 mm nuts and a few fuel lines and vents, and a return.   As for the other problems in this thread, I noticed that in the later models, like 04 and up there is a water/splash/drip cover over the pcm. My 03 doesnt have it, but I live in the desert so it has not been a problem. It might just be missing it, as mine was used and was in a front end accident before I got it.   For everyone in moist climates, its probably a good idea to remove grounds every now and then and wire brush the contact area then put back together.
#42 of 45 GMC Savanna Van (Won't start when Hot) by igsg8tor Jun 15, 2009 (10:20 am)
OK I'm new here so bare with me he as I describe my dilemma to you all!   I have had this ongoing problem with my Van for about a year it runs fine when cold but after it runs for about 5 to 10 min's and you shut it off it will not restart. I have had many people try and figure it out and have spent many hours working on there suggestions, and spent to much money on things that didn't work. So far I have changed the fuel pump and filter, change the Ignition Control Module and Camshaft Position Sensor, and removed the (2) Catalytic Converters to check for blockage and still the same thing! I have now turned to you all for help I hope someone has had this problem fixed.   you can start it when hot if you step on gas pedal but it will stall out when you let up on it, on another note when it runs the speed o is very erratic (but I think that is a sensor) and not what is causing the not starting when hot problem. Replies to this message: elliotg (Sep 30, 2009 9:47 pm)
#43 of 45 Re: GMC Savanna Van (Won't start when Hot) [igsg8tor] by elliotg Sep 30, 2009 (9:47 pm)
Replying to: igsg8tor (Jun 15, 2009 10:20 am) Hi, I have the same problem. Can start if giving it lot's of gas, then let off it dies. Had the speedo jumping around just the other day too.   Did you figure out what the problem was?
#44 of 45 Chevy 2002 express van with 5.7 liter engine will not start by van3500 Oct 26, 2009 (7:27 am)
Van died on the road, had it towed to garage, $500 later with new distributor (top bearing was worn) rotor and cap it ran fine. Drove home, 4 miles. An hour later engine would not start, no spark, I have a spark tester. Spark came back engine started, drove to job site, shut off and engine would not restart, no spark, later engine started. Drove home.   Saturday, engine started and ran fine for short trips. Sunday I used "Auto-tap" OBDII tester, no codes, replaced the crank position sensor, monitored engine. Restarted engine approximately 10 to 15 times with no problem. Monitored with Auto-tap, no codes, tracked ignition voltage, 14 volts steady, drove around the block, flogged it ran fine. Sunday evening, drove 0.2 miles, died, no spark, no gauges, no idiot lights, only light on dash is "ABS" light. Will check for bad fuse. Fuse is good.   Monday, plugged in Auto-tap, gauges and warning lights functioned and engine started. Removed gauge fuse, engine will start and shuts down in about 3 seconds. Will now look for a loose wire, call my GM dealer and see if there are any service bulletins for this problem. Replies to this message: van3500 (Oct 27, 2009 5:40 am)
#45 of 45 Re: Chevy 2002 express van with 5.7 liter engine will not start [van3500] by van3500 Oct 27, 2009 (5:40 am)
Replying to: van3500 (Oct 26, 2009 7:27 am) Monday afternoon: At the Chevy dealer's I talked to the service writer, he asked a mechanic to talk to me, his thoughts, loose wire or bad connector. Especially after the engine stopped there were no codes. The event causing the problem happened and simulated the key being turned off. He recommended checking each wire, looking for a loose connection.   I talked to a friend that works at a truck garage. When I mentioned plugging the OBDII tester in and the warning / status lights came on he said I had a bad ground. I found a loose ground wire at the thermostat housing, Tightened the ground and the van is running fine. I will monitor for a few days until my confidence in the van returns.   I hope this helps others.

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