# 2003 Cadillac STS - How to replace switch

**URL:** <https://community.cartalk.com/t/2003-cadillac-sts-how-to-replace-switch/158809>\
**Category:** Maintenance/Repairs\
**Tags:** cadillac\
**Created:** [February 19, 2020, 1:59am UTC](https://community.cartalk.com/t/2003-cadillac-sts-how-to-replace-switch/158809 "2020-02-19T01:59:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![George48](https://avatars.discourse-cdn.com/v4/letter/g/5f8ce5/32.png) [@George48](https://community.cartalk.com/u/George48)\
**Post date:** [February 19, 2020, 1:59am UTC](https://community.cartalk.com/t/2003-cadillac-sts-how-to-replace-switch/158809/1 "2020-02-19T01:59:51Z")

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How to replace headlight switch including twilight sentinel unit?

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**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\
**Post date:** [February 19, 2020, 4:25pm UTC](https://community.cartalk.com/t/2003-cadillac-sts-how-to-replace-switch/158809/2 "2020-02-19T16:25:31Z")

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I like Haynes manuals for info, and there are bad to excellent videos on Youtube for many repairs. Be sure to disconnect the battery at the negative terminal and know how to reset your radio (I use the term advisedly) when you reconnect the battery.