Go to AutoZone, when you purchase the bulbs, they'll install for free
Along the frame rail on the drivers side of the vehicle just a head of the fuel tank.
Yes, the ignition on a trailblazer can cause head lights to work improperly.
HOW DO I CHANGE LIGHT BULBS
take that head light out and look at the connection to see if the prongs are corroded and not making a good contact. or check for a bad ground or no juice at the plug
To change your Durango's tail light, first make sure to have a flat head screw driver and a new bulb. You will then open your trunk and remove the screws to the tail light, swap out the bulbs and replace the housing case.
change a headlight on a 1997 plymoth voyager
To change the front head light you need to unscrew the screws to remove the protective casing. Once the protective casing has been removed the front head light bulb can be replaced with a new one.
how to change the rear tail light bulb on a 2004 Nissan maxima
Down the center of the head under the intake box. You have to remove each coil with one 10mm bolt and then the plugs are easily accessed.
To change the front head light you need to unscrew the screws to remove the protective casing. Once the protective casing has been removed the front head light bulb can be replaced with a new one.
I made a video on how to change the head lights in my jetta This is for a 2006 jetta tdi, but other years apply http://www.truezombielife.com/2006-jetta-head-light-replacement/