Why are the lights flickering on my GMC Sierra?
Why are the lights flickering on my GMC Sierra? Keep in mind that some minor flickering is normal and is due to the changes in output voltage of the alternator as controlled by the PCM. This vehicle had a swing in voltage of up to .8 (eight tenths) of a volt. That is not normal. Where is the blinker on a 2003 Silverado? Should fix your issue. don't forget, the 2003 Silverado had an extra 194 bulb on the side of the tail lamp as a side marker light.. everybody forgets that one. Yep, they have small bulbs in the...