I have a 2000 Pontiac Grand Am 3400.. wouldn't start one day at all so replaced batt, starter & alternator. Once driven all lights come on and then power loss happens and car shuts down. Jumping only allows it to start for a moment then the car stalls out and no power? What could be wrong? Pls Help? Ty

first most GM OEM systems will need to recognize the key first and foremost ,to do that you will need to roll window down on driver door,turn the key to the run position and with engine NOT running leave the key on for 10 minutes exactly ..then turn ignition off then try to start engine. if original system is working engine should start normally

If the resistor bypass doesn't solve it, another remedy could be a plug-in type engine block heater- I mean plug into household current. It keeps the engine coolant warm in the block. Every other car here in Montana uses one-works great for those below zero nights. When the wife pulls into work, just run an extension line and keep the car plugged in till time to go. Other than that, IDK, sounds like you've covered it pretty well as far as solutions.

Could be lose wire on alternator if light come on check belts

Used parts such as starters and altinators don't last. It might **** but it sounds like you need to buy a new starter,altinator, and battery. Or just start with buying one at a time.

sounds to me like a siezed up ac unit.. it would not spin while all other pulleys spin... thus causing the broken belt.. hope that helps you

Its a solenoid...it engages the bendix and truck starts...bendix should retract because power to it gets shut off by ignition switch going to "run".

Only way bendix would stay engaged or get a signal to keep turning ???
Bad contacts in ignition switch...maybe ??
Start relay in under hood power distribution panel has hot or welded contacts ?

I've gotta think about this one...hope this gives some help...

Hi
Pop into to your local garage and have a diagnostic test carried out.
Listen to the advise given. It may save you lots of money, especially if you start the "guessing" game.
It does sound like a part may be blocked or failed though, but the sytem needs to be tested thoroughly first.
Good luck
Roger

if the light for security is flashing yes it will not start

there is a starter relay by the battery atachted to the radiator suport if the batt was changed resintly it may of been knock off the retainer and pulled wires out of the connector try that and is the security light on ?

Everytime you replace the starter? how many starters have you replaced? Why are you replacing starters? May be you need to start buying quality parts. The Starter has nothing to do with the battery light. DO NOT DISCONNECT THE BATTERY WHILE THE ENGINE IS RUNNING. That can whipe out the engine computer.