Engine stalls while driving?

I have a 2001, Chevy 3500 dually w/8 liter engine. It has a very random ignition problem. Here are the details. To start the check engine light is not on. The problem is at random times the engine won't start, the starter turns but it won't start, if you take the key out and wait a second sometimes it starts again sometime it doesn't. It has a remote to lock and unlock. I have pushed the remotes unlock button when this has happened and it started, sometimes it doesn't. I have also shook the ignition switch and it has started, sometimes it doesn't. I have also just taken the key out and put it back in and it started sometimes it doesn't. I took it and had it put on a diag w/ no code. When it is running it runs great. Here is the kicker, I was driving it the other day and it stalled at 45 mph, it was the first time this happened. I coasted to the side of the road, turned on my hazards, took the key out, pushed unlock on the remote, and it started. The other thing is the cruise control stop working when I tried to use it right after this. I am getting ready to take my horse on a road trip. I can't have a truck that won't start with horse stuck in a trailer. Any help you can give will just make my new year.
Extra details for this truck are as follows:
1. It pulls a 2 horse trailer w/ brakes
2. It is also wire for a 5TH wheel
3. It has 18300 miles on the engine
4. The engine gets regular oil changes and well kept
thanks John

The fuel pump is les than 6 months old. Last month I had the fuel system checked and fuel filter replace with a complete tune up.

My 2001 Silverado has a 5.3 liter engine and it stalls or dies for no apparent reason at low idle. This is an intermittent problem where it may not stall for a week and then it may stall 4-5 times in one day. The RPM speed at an idle or stop light sometimes dips too low, under 500 RPM. I have had the truck into the dealer several times and they can not determine the cause. They even put a black box recording device to monitor various parameters of the enging and could not determine a cause. I have asked other dealerships' service departments the same question and no one has an explaination. There is never any engine lights or codes that come up and the engine always restarts with no problems. I have changed the fuel filter with no change in perfomance. This happens most often I have noticed after the engined has been warmed up for the day. Any suggestions on the cause of this problem would be appreciated.

I have a 2500 HD which stalls while driving, at a stop, and occasionally won't start. This occurs randomly and to start the truck it has to sit a minute and it starts right up and goes. I sometimes have to release the gas cap and replace it and it starts right up. There's no common thing that seems to trigger it. I've taken it in and had numerous parts, sensors and maintenance but it continues to stall. It seems to be a gas problem but I don't know. No codes come up that relate to it.

REPLACE THE FUEL FILTER

It has an 8.1 liter engine. I've replaced fuel filter (twice) and the pressure regulator. I haven't notice a gas smell under the hood.

Hi,
I am having a problem with my 01 Chevy Silverado. I bought the truck used in August and a few weeks into having it the truck stalled for no reason. I dismissed it as a freak accident and moved on. Then it started to stall more and more. I began to notice that before it stalls I can hear the engine and see the RPM's go up and down up and down eventually stalling itself out. If I tried to start it RIGHT AFTER it stalls then it has a little trouble, but if I let it sit for a minute or two it starts right back up and runs perfectly normal like nothing even happened. I began to think it might be my air filter sensor or my fuel pump. I got the air filter sensor cleaned and it still stalls. Due to the price I am apprehensive to get the fuel pump changed because I am not experiencing many symptoms of a bad fuel pump. I began to so a little research and found something called he Crankshaft Position Sensor (CPS). I looked at all the symptoms and they pretty much match up. It has a little trouble starting but it never had a no-start situation, the exhaust smells a little funny after the stall out, and when I do get it started up after it runs like nothing ever happened to it. I do not experience any backfiring and the check engine light is not on. I believe this is the problem. I just want to make sure an experienced mechanic can tell me if that may be the problem or is there something else I can
check?
Thank you!

Yes only at idle. That's why I don't think its the fuel pump. Although my definition of idle is right when I take my foot off the gas. So Ill be going say 40 MPH then take my foot off the pedal and the RPM's would start going up and down. It usually doesn't just start doing it randomly sitting at a stop sign or something. Or at least hasn't yet.

Thanks!

2001 SILVERADO, Z714WD.
When the weather is normal the truck runs great. When the weather turns below freezing, the engine will start fine, but stall unless I press the gas. This happens when I go to warm it up in the morning. Also the Heat only works on setting 4 and 5, not 1, 2 or 3. Any suggestions on these?

Your fan on your heater only working on 4 and 5 speed is the fan resistor needs replacing, eventually it will only work on high if not replaced.

Runs great but stalls as soon as you hit brakes.