Engine stalling?

Have you checked fuel pump pressure? Has the check engine light ever come on?

This guide can help us

https://www.2carpros.com/articles/engine-stalls

Please run down this guide and report back.

No I haven't checked the pressure ,and no the check engine light has never come on just confuses me why this only happens in the spring/summer

That is odd. THe reason I asked about the engine light is because I question the temp sensor. It tells the computer the ambient temp and coolant temp. From that, the computer decides how rich or lean to make the fuel mixture. For example, if it is 50 degrees outside and the computer thinks it is -40, the fuel mixture will be too rich for the engine to run properly.

yea I've had the truck to 3 different GM dealers with no results just seem to be "throwing parts" at it in attempt to hopefully by a small chance of luck fix it , but at this point whatever gets the job done. I appreciate your time if you get anymore ideas I'm willing to try it

Driving 65 mph, heard a popping sound and when i was giving it gas nothing was happening and i seen my rpms drop to 0 and my power steering stopped working and now i cant get it to start back up, i dont see any fluids leaking anywhere all my electrical is still working also. Could it be the alternator or is this an engine problem ?

I'm not sure about the noise, did you check accessory belt, under the hood. If it cranks good but won't start, have a helper crank it while you visually check for spark at the plugs. If spark everywhere, check fuel pressure. Start with the basics.

I parked the vehicle running fine and replaced the steering column to try and eliminate the noise I experienced when turning to the right. After replacing the column and installing my old ignition tumblers for my key, the engine turns over fine tries to run and the second you let of the key the engine dies. checked fuel pressure 60 lbs. good spark it seems, and the fuel pump runs and their is good fuel quantity . checked all the fuses and relays they test good MAP sensor when unpluged has no effect on the situation. could it be in the BCM.

is there a security light on? is you ingnition switch lined up properly? you may have it off a tooth and thats why it shut off when you let off the key?

no security light on and no codes, double checked the lineup of the tumblers it seems to be fine.

not the tumblers, the ingnition switch it self.

Im sorry thats what I meant the only way I could get the ing switch in or out is to be in only one position if I rotate the slot inside the column the switch will not go back in , it seem to only go in one way.

with it where it is at now, can you remove the key in the lock position .

No the switch will not come out of the column.

Im sorry the key only comes out in the off position no other . Could this be a BCM issue not recognizing the Hall effect sensor in the new steering column ????

i think there is a problemin the ingnition switch

Found out the problem the new column has a hall effect switch that the BCM looks at for security purposes and it was not recogonized so it went into the security mode with now display on the dash. I tore the column appart and replaced the new column switch with the old hall effect sensor and it started right up. the only other way to fix the problem was to go to someone that had a tech II programmer and reprogram the BCM, The truck would not run so I would have had a towing bill on top of the programming charge.

thanks for the support.

I have a 99 Silverado 5.3 198k miles, and was trying to diagnose a problem where it would run fine when you accel slowly, but the minute you apply any load it would back-fire. 7 people have attempted to find the problem, and failed. I bought a small scanner, and it came up bad crank sensor. I replaced the crank sensor, and now it will turn over, catch, but dies right away. I still get a EGR low voltage on key on, but that has never effected starting to this point. I have replaced the following in trying to get the original problem fixed. New: Fuel pump, TPS, plugs, wires, fuel cap, fuel regulator. Cleaned: EGR, PCV, MAP, MAF. Desperate for help thanks you.

Install a fuel pressure gauge to be sure it is keeping the pump running. Also need to check for spark, to see what it is losing when it dies and we can go from there

fuel guage installed all pressure was normal before installing the crank sensor. That was one of the first suspects, "thinking fualty fuel pump" It was about 53 at key-on, then varied at about 60 at high RPM. WIll check spark next. Thanks for the suggestions.

1999 Silverado 5.3 V8
The other day on my way to work, my truck died. I stopped, and restarted it, and it kept going for two more blocks before dying at an intersection. It will crank strongly, and sometimes it'll start but it won't stay running. It sounds like it's either starving for air or starving for gas. The fuel filter was old so I replaced it, I've Triple Checked the fuses under the hood and inside the cab. The Fuel pressure regulator seems to be okay, and the fuel pump IS engaging. We've checked the plugs, fuses, Fuel pump, regulator, and filter. When it DOES turn over, it'll run fine for a few seconds, untill it starts to sputter and die. Sometimes right when it's about to die, it'll rev back up to normal idle. Completely Dumbfounded. I did remove the new filter today to see if the gas is the filter is discolored, and it's as normal as can be. Any help would be greatly appreciated.

Check the fuel pressure if its within specs and test the fuel pump and oil pressure sending unit-

Fuel pressure is fine. Fuel pump tested okay. Truck threw only one code P0108, MAP. Replaced MAP Sensor, Truck started at first crank (For a change), and died again...

Clean out the idle air control valve and also the EGR valve and the MAF sensor with an electronc cleaner CRC and see what happens

will codes P0171 and P0174 keep a 1999 silverado 5.3 engine from starting. Will a defective MAF keep thee truck from starting. It died at red light and would crank but not start.

check for fuel pump running and spark at plugs.

No, they won't prevent it from running but they are an indication that the engine was running to lean and likely starving for fuel meaning the fuel pressure was likely low. This engine requires a minimum of 55PSI to run and bad fuel pumps are common.

it could also blew a timing belt possibly but id check the fuel and spark firsr

NO, it can't "blew" a timing belt because it doesn't even have one.

One day I was driving down the road in the truck and it sputtered out and died. No security light came on nor has it ever except for when I open the door which is normal. It will turn over but won't start. It will crank for a second when you pour has in the throttle body. I checked the fuel pump and every line connected to it and it's all good. Can you help me figure out what it is? It's urgent it's my only transportation and I need to get it back running asap.

check fuel pressure with a gauge should be 60-66 psi, these had an issue with the harness at tank and had to be replaced with about a foot of harness with new connections as well as pump. Delco supplies it with their pumps and a few others do as well.

in my truck you can be going down th road driving just fine but after 10 or 15 miles it just losses all power.the veicle wont die its just when you hit the gas nothing happens it just slows down untill it stops.you can pull over and let the truck sit for about 5 minutes and it will drive fine for another 10 or 15 miles and it does it again.

Check engine light come on during the problem.
Have you had truck checked for trouble codes?
If no codes you may contamination in fuel tank. When you start out pickup screen is clean but after driving debris clogs it up truck starves for fuel. Let it debris fall away clears pickup you drive off process starts all over.
Good luck let me know