Dash Security Light - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Ironhorse** · 02-04-2008, 09:40 PM

Have a '99 Tahoe bought about a year ago. Just recently when driving the dash board "security" light comes on while driving. Stays on until vehicle is shut off and restarted. May not come on again until another shut down and start sequence. Normally it came on only during start up and then went off. No other issues, Tahoe runs and drives great. Is it a "sticking" relay or ??? Is it an issue I need be concerned with as in take it to the dealer? Bear in mind, I am "old school" and not very up on the newer computer/electronics in todays vehicles.

SkylineNXS · 02-05-2008, 05:02 AM

I drove a 2000 Sierra for my last two years of highschool, and im pretty sure it comes on when the doors are open, i would check all the pins for your doors and such and see if theres a sticky one. It also comes on when the alarm goes off, but im pretty sure you would notice that. Other than that im not sure though, good luck...

BRAD

kaycee · 02-06-2008, 09:52 AM

Hope you can find the problem I am trying to track mine down allso.Mine started out like your then I got in to return home and no start,I waited about 10 min and it started and didn't have a problem for a few weeks then thelight did come on a few times and then it did the no start bit again wait 10 min and then it starts.This is a problem that you have to use a TECH 2 tool to diagnose (dealer) or a wealthy friend.Problem is it still wont pin point the problem but will narrow it down to a few parts to throw at it.I have talked to a few gm techs and they said to change the switch (between key tumbler & BCM) BUT you need the Tech tool to redo the computer code.

**Ironhorse** · 02-09-2008, 08:02 AM

I figured it was probably one of those things that is a "take it to the dealer" type situation. I hate that. Might as well bring the title along with me. I did have an intermittant start situation I posted about but after changing the rotor and cap that seems to have fixed that. It was suggested changing them by a couple board members during some very wet, humid weather. Have not had a problem with that since.

Security light still comes on occasion. ????

kaycee · 02-09-2008, 09:17 AM

Mine does it on the 2001 Silverado 5.3 L so there is a coil to every plug, no cap.I have searched for the switch on line and found it for $94. just need to get the 94. bucks now.GOOD LUCK and keep us posted

**Ironhorse** · 03-02-2008, 07:08 AM

An up-date on the dash "security" light and no start condition. Took the Tahoe to a mech. I've used for several years. Scanner showed an in-correct password to the "theft deterrant". Changed the theft deterrant module, re-programmed and also removed an after market alarm system with remote door locks. So far the security light situation and the no-start condition have not re-turned. Keeping my fingers crossed on this.

02-04-2008, 09:40 PM	#1
Ironhorse Senior Member Join Date: Jul 2001 Location: Wellington, Ks Posts: 10,294	Dash Security Light Have a '99 Tahoe bought about a year ago. Just recently when driving the dash board "security" light comes on while driving. Stays on until vehicle is shut off and restarted. May not come on again until another shut down and start sequence. Normally it came on only during start up and then went off. No other issues, Tahoe runs and drives great. Is it a "sticking" relay or ??? Is it an issue I need be concerned with as in take it to the dealer? Bear in mind, I am "old school" and not very up on the newer computer/electronics in todays vehicles. __________________ 1971 Chevy 1/2T 4x4 LWB 350 V-8 Was sm465-now 350TH/np205 Tilt, Tach, Towhooks Original Truck AM/FM Wellington, Ks

02-05-2008, 05:02 AM	#2
SkylineNXS Registered User Join Date: Oct 2006 Location: Elgin, IL Posts: 658	Re: Dash Security Light I drove a 2000 Sierra for my last two years of highschool, and im pretty sure it comes on when the doors are open, i would check all the pins for your doors and such and see if theres a sticky one. It also comes on when the alarm goes off, but im pretty sure you would notice that. Other than that im not sure though, good luck... BRAD __________________ 2000 GMC Sierra EXT Cab Short 4x4, finally mine... 1966 C10 SWB Fleet, 250 I6, three on the tree.... Previously Owned.... 1987 Chevy R10 "Silverado" (at least the badges were) Short Step 350 700r4.... 1972 Chevy LWB Fleet 350/350 EXTENDED CAB ALL THE WAY! .._..~...-...._...____ .._..-...______\|_\|__\____ ..-..~.\|_(O)__\|_\|__\|_(O)]

02-06-2008, 09:52 AM	#3
kaycee Registered User Join Date: Jan 2000 Location: Wyoming USA Posts: 2,453	Re: Dash Security Light Hope you can find the problem I am trying to track mine down allso.Mine started out like your then I got in to return home and no start,I waited about 10 min and it started and didn't have a problem for a few weeks then thelight did come on a few times and then it did the no start bit again wait 10 min and then it starts.This is a problem that you have to use a TECH 2 tool to diagnose (dealer) or a wealthy friend.Problem is it still wont pin point the problem but will narrow it down to a few parts to throw at it.I have talked to a few gm techs and they said to change the switch (between key tumbler & BCM) BUT you need the Tech tool to redo the computer code. __________________ 2001 Silverado K-1500 2005 FXDWG stage3 69 CHEVY Short/Step 327/4L60 373 posi 63 IMPALA 327/4L60

02-09-2008, 08:02 AM	#4
Ironhorse Senior Member Join Date: Jul 2001 Location: Wellington, Ks Posts: 10,294	Re: Dash Security Light I figured it was probably one of those things that is a "take it to the dealer" type situation. I hate that. Might as well bring the title along with me. I did have an intermittant start situation I posted about but after changing the rotor and cap that seems to have fixed that. It was suggested changing them by a couple board members during some very wet, humid weather. Have not had a problem with that since. Security light still comes on occasion. ???? __________________ 1971 Chevy 1/2T 4x4 LWB 350 V-8 Was sm465-now 350TH/np205 Tilt, Tach, Towhooks Original Truck AM/FM Wellington, Ks

02-09-2008, 09:17 AM	#5
kaycee Registered User Join Date: Jan 2000 Location: Wyoming USA Posts: 2,453	Re: Dash Security Light Mine does it on the 2001 Silverado 5.3 L so there is a coil to every plug, no cap.I have searched for the switch on line and found it for $94. just need to get the 94. bucks now.GOOD LUCK and keep us posted __________________ 2001 Silverado K-1500 2005 FXDWG stage3 69 CHEVY Short/Step 327/4L60 373 posi 63 IMPALA 327/4L60

03-02-2008, 07:08 AM	#6
Ironhorse Senior Member Join Date: Jul 2001 Location: Wellington, Ks Posts: 10,294	Re: Dash Security Light An up-date on the dash "security" light and no start condition. Took the Tahoe to a mech. I've used for several years. Scanner showed an in-correct password to the "theft deterrant". Changed the theft deterrant module, re-programmed and also removed an after market alarm system with remote door locks. So far the security light situation and the no-start condition have not re-turned. Keeping my fingers crossed on this. __________________ 1971 Chevy 1/2T 4x4 LWB 350 V-8 Was sm465-now 350TH/np205 Tilt, Tach, Towhooks Original Truck AM/FM Wellington, Ks



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.