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Re: dash light do not come on but lights do for drl on...
DRL (Daytime Running Lights) will come on any time you start your car.
The dash lights do not come on, unless your headlights turn on. Either by a daylight sensor or if you manually turn them on by the switch.
So even though your headlights are on with the DRL, if you notice the tail lights do not come on (just like the dash lights don't).
To test if your dash lights do work, turn your headlight switch on. You should the the tail lights and dash lights come on.
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It is located in the underhood fuse/relay box , marked DRL 10 amp fuse ! Also if that is good check the DRL relay in the same fuse/relay box .Your light sensor could also be bad .
The daytime running lamps (DRL) will operate when the ignition switch is in the RUN position, for automatic transmissions (A/T), the gear selector is not in the PARK position, the headlamp switch is in the AUTO position, and for manual transmissions (M/T), the park brake is released. When these conditions have been met and the ambient light sensor indicates daytime conditions, the DRL will illuminate. The ambient light sensor is a light sensitive transistor that varies its voltage signal to the body control module (BCM) in response to changes to the outside (ambient) light level. When the BCM receives this signal it will either turn on the DRL or the headlamps for auto headlamp operation. Any function or condition that turns on the headlights will cancel the daytime running lamps operation. The DRL can be manually turned OFF by depressing the AHL/DRL switch in the headlamp switch
Do you know that on inside of fuse box lid it shows what fuse is what .
The DRL 10-amp fuse in the underhood fuse block supplies battery positive voltage to the DRL relay switch contacts and relay coil. When the BCM energizes the DRL relay , the DRL receive voltage on the DRL supply voltage circuit.
You need to buy a new DRL Resistor, about $85 dealer only of course. It's located on drivers side front wheel well I believe it was towards the front bumper. The part is ceramic, just change it out. Mine did the same exact thing and this will fix it!
there are 2 ways to do this, use a scan tool ($50 for a basic one) to reset the light, the other is to disconnect the battery for 5-10 minutes, be advised if the problem is not corrected that set the light the light will come back on in about 20 miles, also if the system is not ready u will fail smog, this means they (person doing the smog) know there was a problem.
most headlight switches are pop in style that u just pop out of the dash and gently undo the electrical connector and replace it in reverse order, however all GM cars have individual relays for the lights so You may want to try a new relay first.