So my MC is a 3.4,I bought it a month ago. All the sudden it just decided to start dying on me. Im going 70 mph on the highway and it just shuts off triggering the battery light to pop up in my messenger window on the dash. After a few minutes of struggling with starting it again I just let it sit and than try again a few minutes later and it starts up but rough. The RPMs jump around when it hits 2-3RPM and I give it more gas and it seems to keep going for a bit. There is really no warning. No check engine light pops up so the guys at Oreillys and Auto ZOne were unable to diagnose any problems. I took it to a GM Dealership and they ran the security and computer on the car to no avail. On a hunch based on the fact that the vehicle has 117K miles on it and the fuel pump had never been changed I crossed my fingers and spent the 300 bucks for a new one. I installed it fingers still crossed, and died on the way home. Next I bought a fuel filter. I have yet to install it as my research via online has lead me to believe that the sensors could be the issue as far as the crankshaft is involved, or someone even suggested the MAF. I had auto zone check my battery and alternator to be sure they were working sharp and they are. I use premium fuel. I crank the gas cap till it clicks a few times. I have never ran it out of gas and there was only one previous owner who took extraordinary care of this car. I love my Monte Carlo and want to see it run well and give me a piece of mind. I have also checked the air cleaner not sure if that matters or not. With the check engine light not coming on Im left to playing the wonderful guessing game. I dont want to spend anymore money on this car if I don't have to.

PS previously to having this problem, I took my car into the dealership to have a FOB programmed to the car. The FOB was in the cup holder when I purchased it and assumed it was the original. It didnt work, I bought a new battery for it, it still didnt work, I looked up programming steps, guess what? It didnt work. Hence taking it to the dealer to have them deal with it. they had my car for 45 min or so and than told me that the FOB was not compatible with my car and therefore had to purchase one that was. It was more money than I could afford at the time and passed telling the guy I would come back for it when my finances allowed it. The next day, my car dies. At the time I assumed it was something to do with the pass lock system or security so I returned it to the dealer to see if they could fix it and they explained to me the two ARE not connected. sooo any help would be greatly appreciated. Thank you in Advance!

Engine cranks, I can hear the fuel pump cycle, the security light flashes on once but goes out, I've tried disconnecting the battery, checked fuses...I'm at a loss.

Replaced most sensors and spark plugs and wires but nothing helps what could be causing this

Passenger lays flat when I step on gas.

Sometimes it hardly moves and other times will go all the way to 140mph

Im leaking oil from a small circular spot which looks like it could be an o-ring sealant. It doesn't leak until i turn off my engine. Then it leaks for a little while. How do i know if its the o-ring seal or if its the intake manifold gasket if heard of?

Cars been having over heating problems found a broken black hard hose looks like it had a red o ring seal but can't tell where the other end goes to .anyone know what that hard plastic hose goes to

Hard plastic piece down below I was told the belt tightner snapped off I guess

front and back brakes have been replaced.

Drove from Michigan to Ohio not stopping. Next day went to store shopped and it wouldn't start. Left there over nite and started next morning

It runs rich if unplugged but it does run. Runs well in morning but won't if I have to shut it off. I have replaced ignition , and fuel pump. Had checked for vacuum leaks and it doesn't seem to be that. Any ideas? Thank you

When the Service Vehicle Soon service light come up the day-running lights turns off and headlights turns on. Also, the display of the gears and radio dimmed a lot. This happen intermittent when I turn the car on or when driving. The car computer shows no code. Any ideas.

I asked this of everyone, including manual, repairman, etc. I discovered by myself, that when I left the turn indicator on, it started CHIMING!

It happens at random times even when the car is off and I open the door.

The indicator lights next to the fan speed control and the recirculated or intake air are dim. Think it might have something to do with the switches but not sure. Almost like it has a short somewhere but I'm not sure where to look.

it to run sat all night and this morning did it again took some time got it to finally run what is problem its a 2000 ss

A few days ago my car stopped having steering capabilities. Upon opening the hood I noticed that the belt powering the alternator was moving very slow and the light on the dash showed the red battery indicator. The mechanic replaced the harmonic balancer and a belt. It runs great the battery light went off however the service engine soon light did not. I know that I have a faulty low coolant light that has to be repaired would that make the service engine light stay on because I see no indications of any other problems?

Still have check engine light and loud noise in engine. Light is solid until 30 MPH then flashes. Thinking low compression in cylinder but what is the culprit and estimated cost for repair?

The fluid is a pinkish color