I have a 1995 GT. When I start it in the morning, I turn on the key and let it sit until the car chimes stop before I try to start. If I don't the car cranks a long time before it starts. When it finally does, it runs like it is loaded up and runs rough until I pump the accelerator to clear it out. When the car sits for a while and I try this, some times it works fine other times it loads up again. The car is like new with only 38000 on the odometer. Weak fuel pump?

Is your Impala a 2000, 2001, or 2002? This seems to be a common problem in those model years...much like its predecessor the GM VATS (Vehicle Anti-Theft System). While the VATS had a permanent (albeit unapproved) solution, no suck workaround appears to be available for the Passlock system. Some websites offer a correction "module" that looks to be a hit-or-miss solution. I did find the following procedure on a forum, and it seems to be reliable. Here goes:
If your car has been sitting while you were at work or home or in the store, and you are coming out to leave, follow steps 1-6.

If you just had the SECURITY SYSTEM lock you out of the ignition system, you will have to wait the 10 minutes for it to reset and allow the ignition control module to interact with the system. Once the 10 minutes have passed from the ACTIVE SECURITY STATUS, follow steps 1-6. Do not try to shortcut this as it wont work.

If it is raining, you can close your door, just not all the way. Close it all the way and open the door latch without pushing the door open. This will keep you dry.

+++++STEPS+++++ 1.) OPEN YOUR DRIVERS DOOR AND SIT DOWN. 2.) PLACE KEY IN IGNITION, WAIT FOR CHIME. (3 seconds is what I usually wait) 3.) TURN IGNITION 1 CLICK RIGHT (TO THE ACC POSITION) AND STOP! Do not continue to ON and START yet. WAIT ATLEAST 5 SECONDS 4.) AFTER 5 seconds has passed, TURN KEY TO ON and STOP, DO NOT CONTINUE TO START YET! 5.) WAIT AND WATCH. With your drivers door open, here is what you will see and hear = Your notification will signal DOOR ADJAR, then the BATTERY light, then the SECURITY light, during which you will hear the chime sound as if you just started the car. 6.) AFTER YOU SEE THE SECURITY light switch back to DOOR ADJAR or Battery, and after the CHIME has stopped, you can turn the key to start and voila!

It has worked every time for me and 5 of my friends. This whole process takes about 20-30 seconds, but it sure as hell beats 30 minutes, as GM refuses to compensate my time lost to their vehicle\'s design flaws.

RECAP: 1.) Open driver door, sit down 2.) Insert key in ignition, wait for chime 3.) Once chime starts wait 3 seconds 4.) Turn key to ACC position WAIT atleast 5 seconds 5.) After 5 seconds turn key to the ON postion and wait for the security light to switch back to Battery or DOOR adjar, and the chime to stop (Do not try to START if the chime is still sounding) 6.) Once chime stops and Security light has passed, You may now complete the turn to START and it will start.

Note: This is not a permanent workaround, but it will buy you some time, I can almost guarantee it will work for most if not all people, almost all the time.

My first two guesses would be a dead cell in the battery or a dirty cable end. The dirty cable connection could cause a high level of resistance.

If the chime includes the cab light staying on as well:
There is a door switch in both the driver and passenger side doors that needs attention. I too had this problem. Solution: squirt wd40 onto the switch located near the door latch on both driver and passenger side.

Let the car sit undisturbed for 10 - 15 minutes, then try to start it. Check the owners manual if you have it. Sometimes, on various cars letting them sit awhile will allow the system to reset itself. On others sometimes rapidly turning the key from off to on, without turning to start 3 to 8 times within 10 seconds and then on the last turn to the on position leave it there until the horn chirps, at that point turn the key directly to start, or turn off first and turn to start. If all this fails, a GM dealer can reset the system.

this could be a few things fuel pump getting weak or your alarm could of activated itself and it disables the fuel to the engine, I would try reseting the built in alarm system. first put the key in the ignition and turn on till all the lights come on and let it sit 10 minutes with the key on, then after the 10 minutes is over turn the key to the off position and wait 3 seconds and then try to start. if it starts which is possible because grand ams and olds aleros are bad for the security system locking up by them self. Hope this helps.

Is the theft light flashing while your trying to start it? Try a different key,maybe the theft unit in the key got damaged. Has to be one that came with the car. Also if someone has a code scanner, you will see a code like p1260 theft detected if it can read your key.

Section 13-09: Gauges, Warning Devices — Chime System 1996 Windstar Workshop Manual
DESCRIPTION AND OPERATION Warning Chime Systems Three distinct sounds are used to indicate the area of concern. Seat belt warning generates 1 chime per second
key-in-ignition generates 2 chimes per second
headlight on generates 4 chimes per second.
Key-In-Ignition Warning The key-in-ignition warning will sound when the driver's front door (20125) is opened with the key in the ignition switch. It will continue to sound until the key is removed, the front door is closed, the ignition switch is turned to START or the vehicle speed is over 24 kmh (15 mph).

Safety Belt Warning When the ignition switch is turned to RUN or START from OFF or ACC, the chime will sound for six seconds or until the safety belt is buckled.

• The safety belt warning indicator lamp (10C859) will activate for 60 seconds or until the driver's safety belt is fastened. Both the chime and lamp activate at the same time.

Anytime the ignition switch is released from START and returns to RUN while the safety belt lamp or chime is activated, the safety belt warning lamp or chime will remain activated until either the timing sequence has been executed, or the safety belt is buckled.

Headlamp Switch On Warning The chime will be activated if the headlamps or parking lamps are ON, the key is not in the ignition and the driver's door is opened. The chime will sound at a rate of four per second.

Hi
There is a switch in the seat belt latch whe your sitting in the seat this will ba the part o the right side, see if something went into the latch part? or the switch is bad i think you have to replace the belt to fix the switch
RD

Do the interior chimes and headlights turn on when you turn the key in the ignition???? We have a 95 Riv that gave us the same problem. Occassionally we have to put the key in the ignition, turn it on, move the steering column up and down (sometimes roughly) until the chimes etc. come on (some security thing) then the car will start.

Check for current leakage.. I suggest you start from the DVD player connection and trace back to the main power supply.
Please let me know the Audio and DVD player Brand and models...