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  1. #1
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    Default Questions on body control module replacement

    2001 Buick regal LS problem seams to be cant turn headlights off {ha ha better then no headlights I guess}
    Have tried a few headlight switches no difference.
    High and low beams change so I don't think its the steering column switch
    I don't know if the light sensor ever goes bad that on top of the dash sunlight or dark no difference in the light
    dimming on the cluster or radio.
    So thinking bad body control module so here is the questions
    1 So you can just get used one out of a yard or one from like auto zone?
    2 We have access to a TECH 2 for this year and model is this all we need
    to reprogram the used or new body module to work on the car?

  2. #2
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    Default Re: Questions on body control module replacement

    Body control modules are not a swap computer. Once its mated to a vehicle its locked

    Sent from my SM-G928V using Tapatalk

  3. #3
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    Default Re: Questions on body control module replacement

    so how do you replace it ?

  4. #4
    Solving problems BrandonHall10's Avatar
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    Default Re: Questions on body control module replacement

    Quote Originally Posted by Boone570 View Post
    Body control modules are not a swap computer. Once its mated to a vehicle its locked

    Sent from my SM-G928V using Tapatalk
    I must have gotten really lucky with mine then... Plug and play.

  5. #5
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    Default Re: Questions on body control module replacement

    Must have gotten lucky. Diff bcms have a rpo codelist that need to be correct for the vehicle. And u need either tech 2 or sps to program.

    Sent from my SM-G928V using Tapatalk

  6. #6
    Killa Bee Scottydoggs's Avatar
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    Default Re: Questions on body control module replacement

    if you were to change any of the computer parts it needs to be the same exact part # on it.

    maybe the solar sensor is messed up? its under that black bubble on the dash.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW

  7. #7
    GXP Level Member Turbocharged400sbc's Avatar
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    Default Re: Questions on body control module replacement

    a good quality scanner even an old snap on red brick will be able to tell you whether the BCM is triggering the lights without a headlight input or whether it thinks it's Twilight. etc.
    first swapping the BCM he is correct it does need to have the correct coding for the vehicle options as on the newer cars the BCM is the primary control unit for everything.
    ~James~ Psychotic Gearhead
    projects: 84 Cressida waGN~ 90 LN3 3800, equal length headers, T70, 89 700r4, misc parts,
    1994 Oldsmobile 442 (462ci-4wd-2 engines) L67/4t80e^2,
    00 Turbo Regal 608 fwhp 575ftlbs at 5500rpm, 98 WhippledRiv, 97 GTP

  8. #8
    Solving problems BrandonHall10's Avatar
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    Default Re: Questions on body control module replacement

    Quote Originally Posted by Boone570 View Post
    Must have gotten lucky. Diff bcms have a rpo codelist that need to be correct for the vehicle. And u need either tech 2 or sps to program.

    Sent from my SM-G928V using Tapatalk
    Sorry, it's hard to convey sarcasm in text. Luck was not a factor.

    Certain BCM's need programming and others don't. My car is old enough, the BCM is plug and play. Like Scotty said, the part number must match what you have/ RPO code.

  9. #9
    Killa Bee Scottydoggs's Avatar
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    Default Re: Questions on body control module replacement

    and your know the lights are on a timer too right? they stay one for a minute after you turn off the car unless you pull the light switch to on then turn it off. then the head lights turn off asap for me.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW

  10. #10
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    Default Re: Questions on body control module replacement

    so the correct answer how to replace it is junk yard with same # and use a tech 2??

  11. #11
    GXP Level Member Turbocharged400sbc's Avatar
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    Default Re: Questions on body control module replacement

    what im saying is that ive had ground issues cause lights to stay on since the relay is activated due to backflow of current.

    if you want to just replace the bcm, go ahead....its possible your lights will still be on though if it is a ground/wiring fault.

    a snap on MT2500 (aka the red brick-an old scanner) will be able to talk to the bcm, and find out whether the bcm is seeing lights commanded on/or any other condition thats not normal.

    diagnose, dont just replace.

    but by all means, if you want to drop in a bcm only to find out later that the relay ground rubbed through and the real fix to the problem was 2 cents of electrical tape....

    just sayin'
    ~James~ Psychotic Gearhead
    projects: 84 Cressida waGN~ 90 LN3 3800, equal length headers, T70, 89 700r4, misc parts,
    1994 Oldsmobile 442 (462ci-4wd-2 engines) L67/4t80e^2,
    00 Turbo Regal 608 fwhp 575ftlbs at 5500rpm, 98 WhippledRiv, 97 GTP

  12. #12
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    Default Re: Questions on body control module replacement

    I thank every one for all the help but if I need to end up replacing the BCM what is the exact way its done? same part # from junk yard? and a tech 2 OR?????

  13. #13
    Killa Bee Scottydoggs's Avatar
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    Default Re: Questions on body control module replacement

    i changed mine trying to fix my abs issues. from what i can tell from my own searching is it needs to be from the same year car, and be the exact same part# on the module.

    oh super pita to find the right one too. got mine for morads ebay listings. sadly, it did not fix my issues or cause any new ones.

    you need to pull yours out to get the part# of the sticker, then search high and low for it.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW

  14. #14
    GrandPrix Junkie CrazyGuy03's Avatar
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    Default Re: Questions on body control module replacement

    Any idea if the issue is with the DRL module box under the dash by the hood latch ?
    2003 Buick Regal GSX lots of mods - click here to see latest build - http://www.grandprixforums.net/threa...ld-for-the-gsx

    *For Reference - Does not have a Zack Howard Cam - It's an Intense Stage 3 - Thank You*

  15. #15
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    Default Re: Questions on body control module replacement

    thank you I will check the DRL module but back to the BCM when you go to the parts store and get a
    and says must be flashed on car do you use a TECH 2 ? OR ???
    Any one know ???

    Cardone Remanufactured - Body Control Computer Line: A1 | Part # 73-8970
    $85.99 Each
    Plus Core $85.00
    Add To Cart Add to Shopping List
    Availability

    Ship to Home: Available

    Free Pick Up In-Store: Usually Avail. 2-3 Days

    Find store with item


    • 1 year limited warranty
    • Remanufactured
    • Units Must Be Flashed On The Vehicle
    • Vehicle Specific On-Car Programming Must Be Performed After Install To Prevent Drivability Issues
    • With OE Number: 9388970
    • New Or Remanufactured: Remanufactured

  16. #16
    Killa Bee Scottydoggs's Avatar
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    Default Re: Questions on body control module replacement

    means just that, you need a tech 2 scanner to install it. either a dealer ship, or a shop with a tech 2. and those seem to be hard to find. at least here.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW

  17. #17
    GrandPrix Junkie CrazyGuy03's Avatar
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    Default Re: Questions on body control module replacement

    The DRL module failed in another regal and it caused the brake light not to come
    on and the turn signal also not to work. A few times when the module was being removed and re installed , it caused the headlights to come on by themselves as well
    2003 Buick Regal GSX lots of mods - click here to see latest build - http://www.grandprixforums.net/threa...ld-for-the-gsx

    *For Reference - Does not have a Zack Howard Cam - It's an Intense Stage 3 - Thank You*

  18. #18
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    Default Re: Questions on body control module replacement

    So it seams you can use a junk yard BCM with same # you just need a TECH 2 or a TECH 2 clone out of china at a cost about $325.00 the
    DRL module seams to actual be part of the BCM
    As far as I can tell but I could be wrong

  19. #19
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    Default Re: Questions on body control module replacement

    I am having problems with my BCM. It is causing my Grand Prix's temp gauge to go up. Problem is I have to take it to a dealer that is 40 miles away to get it fixed am and not sure if it is just a gauge error or it will over heat. Can I install the BCM myself and just take it in to be programmed? Will it run if I replace it without programming it?

  20. #20
    GTP Level Member 231FUN's Avatar
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    Default Re: Questions on body control module replacement

    Quote Originally Posted by joeinformed View Post
    I am having problems with my BCM. It is causing my Grand Prix's temp gauge to go up. Problem is I have to take it to a dealer that is 40 miles away to get it fixed am and not sure if it is just a gauge error or it will over heat. Can I install the BCM myself and just take it in to be programmed? Will it run if I replace it without programming it?
    What makes you think it's the BCM and not an issue with the cooling system or coolant temp sensor itself?

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