# Security light **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** jimmy, gmc\ **Created:** [February 19, 2010, 6:25pm UTC](https://community.cartalk.com/t/security-light/44760 "2010-02-19T18:25:13Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![kelly2020](https://avatars.discourse-cdn.com/v4/letter/k/7ab992/32.png) [@kelly2020](https://community.cartalk.com/u/kelly2020)\ **Post date:** [February 19, 2010, 6:25pm UTC](https://community.cartalk.com/t/security-light/44760/1 "2010-02-19T18:25:13Z")
My car will not start sometimes the security light comes on and it will not start until 12 hr. later. It happens only once a week. I took it to the dealer and they put a new ignition switch but that did not work No one knows why ---
**Author:** ![ignoramus9](https://avatars.discourse-cdn.com/v4/letter/i/d07c76/32.png) [@ignoramus9](https://community.cartalk.com/u/ignoramus9)\ **Post date:** [February 19, 2010, 7:44pm UTC](https://community.cartalk.com/t/security-light/44760/2 "2010-02-19T19:44:18Z")
Wow, that is really weird. ---
**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:** [February 19, 2010, 8:40pm UTC](https://community.cartalk.com/t/security-light/44760/3 "2010-02-19T20:40:57Z")
only once a week If mine did that once a week, I would not call it ONLY. Once every five years, might get an “only” from me. ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [February 19, 2010, 11:20pm UTC](https://community.cartalk.com/t/security-light/44760/4 "2010-02-19T23:20:33Z")
It’s a longshot, but try replacing the key. You don’t say what year your vehicle is, but GM used to use a system that checked the resistance of the circuit through the key, and wear and/or crud could affect the resistance of the path sufficiently to create intermittant problems.