Question about 2002 Oldsmobile Alero

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2002 old alero 3.4L itermittent no start, star and stall

Hi my name is Yas i have a 2002 old alero 3.4L, it all started with the car having a no start, battery was replaced at that point car started up after driving a while all the dash lights and gauges starting coming on and off every so often the the car was shut off and would not start again i replaced the igniton lock cylinder and passlock assy and did the antitheft relearn car started right up but after a few seconds it acts the same erratic dash cluster and will not start after you shut it off always starts right up after the battery is disconnected for a few minutes im thinking the bcm needs to be replaced or reflashed any help would be greatly appreciated this car is driving me nuts

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  • Djackson010 Feb 26, 2009

    I have a 2002 oldmobile alero 3.4l v6..ive had it for 3 years now and it has 89,000 miles on it now. it has been running good even thought ive had to replace the window regulator and the wheel bearing... So far within the past year my passenger side mirror glass has fallen off, the passenger side seat track is broken, and now it doesnt start at first sometimes!!! ive had the key cylinder and ingnition replaced twice in it within the past year adding up to $700. now today when i was driving it stalled completely and the power steering locked up!! i dont know what to do.i hate this car!! it looks good but is a piece of junk!! ill take a grand am gt any day over it

  • Anonymous Apr 06, 2009

    This past weekend the car stalled out on my going 120 kph on the highway!!! WTF this is the second time it's happened to me...taken it in to the dealer see what's going on? I'll posts back if dumb dumbs fix it?

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My daughter has the same problem and has been in contact with GM. The problem is the system, not the battery or fuel pump etc. GM has no direct fix or parts to repair. The battery disconnect/reconnect works best, its what a dealer will do and they reset the computer even though they find no error. Alero is also is prone to bad motor mounts effecting grounding which can cause the same problem. GM replacement mounts are the same as the problem mounts. Battery reset works here too. Since Olds is gone they won't invest, especially now. carry the battery wrench, drive it till you can't stand it any more and then trade in. Look at the net, its full of the same problem in multiple years of that Alero version. Shame its a nice car.

Posted on Apr 08, 2009

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Posted on Jan 02, 2017

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1 Answer

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One of the coil packs or the ignition module is probably bad. Test for spark when cold. If no spark on any coils suspect the ignition module or crank position sensor. If spark is gone on only one coil check the plugs and wires to that coil pack. If theplugs and wires are ok then replace thge coil pack. Don't forget the obvious load test the battery and clean the battery connections. If the check engine light is on run any diagnostic codes and repair

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Look for a light that says SECURITY or ANTITHEFT on the dash. This light could cause this problem. Explained on this link.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

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