I know you said the security light isn't on but it sounds like an anti theft issue. Read this over I think its what your looking for Do It Yourself GM Security bypass
SOURCE: 1998 GMC Sierra radio and display stays on all the time
First of all...does your truck have the retained accessory power (RAP)? If it does, the radio would always stay on with the key off until you open the drivers door. If it does have RAP and the door pin on the drivers door has went bad, then the truck doesn't know that you opened the door and continues to allow accessory power (although it would still cut off after about 20 minutes). If the interior lights come on when you open the door, then the pin is ok. If the lights come on, it could be the RAP relay. If it has gone bad, it is possible it is stuck supplying power and needs replacing. The relay should be labeled in the fuse panel, and there should be other relays in the panel with the same part number. You can swap a relay for the RAP relay and see if it fixes the problem...if it does fix it swap the relays back and replace the RAP relay. If the truck doesn't have RAP then it is possible the problem is in the radio..if you have a friend with a GM car or truck close to the same year you could swap radios and see if that fixes your problem...should be pretty simple. pull the cover off the dash, it just clips on, take out a couple screws that hold in the radio, unplug it and plug in the other radio. sorry so long winded...hope this helps you somewhat.
SOURCE: Replace 2005 GMC Sierra Daytime Running Lights...
Open the hood, and in the top right and left corners of the primary headlamps you'll see two pins (L shaped) swing them out (towards the front of the truck) and lift out. This allows you to remove the upper headlamp assembly. You can then remove the lower assembly by pushing outwards on the plastic clip that is hooked into a metal clip. Once it's out you just turn the bulb to remove it.
It's much easier if you unhook the leads to the upper assembly's bulbes so you can set the whole thing aside.
SOURCE: 99 GMC Sierra Pickup: Crank but no start. starts
The theft light issue is a good observation. Have you replaced the key tumbler or an ignition component lately? Has there been a lightning storm close very recently?
What the flashing security light is indicating is an attempt to relearn the key you are using.
Turn the key to run position, allow light to flash for 10 minutes, when light stops flashing turn ignition to OFF position for 5 seconds, turn ignition to run position and start over. Do this for 3 consecutive cycles, the the theft system will relearn the key cylinder code and store it once again.
Try that first before you go any further.
Let me know what you find.
Regards,
SOURCE: 2005 Mazda3. Radio display light died, radio
Remove the 15A fuse labeled room clean it and put back. This fixed my 2005 Mazda 3 radio display.
SOURCE: can't find relay for radiator cooling fan on 2005 GMC sierra
Go to Autozone.com and sign up and register your truck for FREE. Then you can scroll down to the Diagrams section which also has Fusebox and Powerbox layouts.
The Relays are usually in the Powerboxes under the hood. Sometimes the horn relay is identical to other important relays like your cooling fan relay.
If the layout shows this is true and the part numbers on the case of the part matches, then you can switch the relays and see if the fan works or the horn works.
The diagrams are also for the chassis and will help you trace the wires by color and will indicate through the wiring pattern of whether the relay is in the Powerbox or next to the fan.
77 views
Usually answered in minutes!
×