# Alero stereo system

**URL:** <https://community.cartalk.com/t/alero-stereo-system/53734>\
**Category:** Maintenance/Repairs\
**Tags:** alero, oldsmobile\
**Created:** [August 18, 2010, 1:25am UTC](https://community.cartalk.com/t/alero-stereo-system/53734 "2010-08-18T01:25:13Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![slipknot](https://avatars.discourse-cdn.com/v4/letter/s/cdc98d/32.png) [@slipknot](https://community.cartalk.com/u/slipknot)\
**Post date:** [August 18, 2010, 1:25am UTC](https://community.cartalk.com/t/alero-stereo-system/53734/1 "2010-08-18T01:25:13Z")

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I JUST BOUGHT A 2000 OLDSMOBILE ALERO AND THE STEREO READS LOC OND THE SCREEN AND WILL NOT TURN ON,PLAY C.D’S ETC. CAN ANYONE TELL ME WHAT MIGHT BE WRONG?

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**Author:** ![edb1961](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/edb1961/32/122_2.png) [@edb1961](https://community.cartalk.com/u/edb1961)\
**Post date:** [August 18, 2010, 3:05am UTC](https://community.cartalk.com/t/alero-stereo-system/53734/2 "2010-08-18T03:05:29Z")

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GM stereos used a code to lock out the stereo as a theft protection system. Google “gm stereo unlock” for instructions on how to unlock the stereo. Here’s a sample site. The Owner’s Manual (if you have it) will provide more info.

> **[How to Get GM Delco Radio Unlock Codes When Display Says LOC](https://itstillruns.com/gm-codes-display-says-loc-5574057.html)**
>
> Does your GM car or truck Radio display LOC and does not turn on? Chevrolet, Buick, Pontiac, GMC, Cadillac, Oldsmobile vehicles used a theft system to lock the radio when power is lost. This system was used from the ealy 1990's to the early 2000's.

I have the same setup on a 2000 Blazer, I’ve never set a code to lock the stereo and have not had any problems.

Ed B.

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**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\
**Post date:** [August 18, 2010, 10:05am UTC](https://community.cartalk.com/t/alero-stereo-system/53734/3 "2010-08-18T10:05:36Z")

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Hint: Loose the ALL CAPS. It makes reading your message more difficult. There is a reason you don’t see newspapers and books using ALL CAPS.

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**Author:** ![TXdealer](https://avatars.discourse-cdn.com/v4/letter/t/50afbb/32.png) [@TXdealer](https://community.cartalk.com/u/TXdealer)\
**Post date:** [August 18, 2010, 1:18pm UTC](https://community.cartalk.com/t/alero-stereo-system/53734/4 "2010-08-18T13:18:25Z")

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The radio may also be locked if it is not the original radio to the car. Most newer GM radios have to be re-programed with a dealer scanner(tech 2) if they are installed into a different car.