check your injector and the O ring that goes around the injector. You will need a star bit or a hex bit, mid size to remove the injector, it just pulls out. and unplugs, check for carbon build-up (black residue) and take the O ring off and examine it. This truck has a sensor that tells how much fuel to dispense, if the O ring is damaged, or the injector is clogged by carbon deposits, it may be sending too much or (if O ring is damaged) or not enough, (if build up has it clogged) fuel and then the truck may not stay running, the proper amount of fuel needs to be dispensed to keep it running. You can clean the injector with gasoline and a tooth brush, don't assume it is bad and needs replaced. You can buy the O ring a any hard ware store for about 12cents. This is very common in Chevy trucks from 1990-1999. I had to replace my O ring in my s-14 about 3 times. but 36 cents was better than *80.00 for a new injector, check it out
Probably a stuck solenoid.
Litering
If this happened all at once, check the vacuum lines. A cracked or broken line will cause high or rough idle.
I would not worry to much about this noise when the motor is cold; engines have clearanaces that come together at operating temperature. If this noise happens when the motor is at operating temperature then you might have a problem.
low oil pressure could be one cause cold oil is heavier in viscoity and as it warms it gets thinner, the lifters are not getting the oil inside of them causing them to colaspe try having a new oil pump installed
Ignition Control Module are common to cause this. Loss of spark with heat from the engine, when it cools off, starts up.
It starts by missing and running rough when pulling a load, and worsens until the engine won't run at all.
No
There are several things that can cause your day time running the light relay switch to malfunction in your 2001 Chevy. The most common cause is a loose or corroded ground wire.
Oil pump failure?
Probably a stuck solenoid.
There can be several things that will cause your 2003 Chevy Malibu to run rough and not shift into fourth here. The probable cause is a lack of fuel. Due to a bad fuel injector.
If it starts but doesn't stay running after you release the key from the start position, it means your ignition switch is bad. Not a huge expense.
failed relay
check the fueses check fueses
Vehicle running hot? and fan trying to cool it down Bad temperature sensor?
only if running the air.