Well, after all that has gone on in this thread, when it's all said and done, the canbus bulb solved the dimming problem!! hahaha!! I have tested it by leaving a regular bulb in one of the lights and the other to the canbus bulb, the regular one comes on dim but as soon as you turn the canbus one on, then it will go bright!! I have tested this 3 times tonight and it has worked flawless everytime!!
So....... for whomever reads this thread and wants to get LED's for their truck and don't wanna have the dimming problem on the dome lights that can be turned on manually with their separate buttons on the light itself, get the canbus version of the bulb you need for that light!! So in my case in my denali, I needed to get (4) canbus style 194 bulbs (2 for the front dome lights and 2 for the second row) and if I wanted to fix my vanity mirror dimming problem I would need to get canbus style festoon bulbs for them!!
So, to sum it all up, to get a dim free truck interior when switching to LED's, be sure to order the Canbus style bulbs for any lights that you can manually switch on separate from the rest and get the regular ones for everything else!!
