Yes, the ignition on a trailblazer can cause head lights to work improperly.
If you brake lights are not working on your trailblazer it could be due to a number of reasons. Your fuse could be blown, or your light may no longer work.
most likely is a faulty chime switch,or a faulty ignition switch
It enables you to see if all the warning lights are functioning properly. Since they're just ordinairy light bulbs, some of them could stop working over time.
Could be either a bad ignition switch or a bad voltage regulator (not opening circuit on shut-down)
The outside temperature may be stuck on your Chevy Trailblazer because the thermometer may not be working properly. You can buy a new part from the manufacturer, but depending on the year, it could be expensive.
have your battery and alternator checked but first check to see if switch for your dash lights are just turned to dim
If your side lights stay on when your ignition is off on a Granada Scorpio Costworth, it could indicate a wiring malfunction. You should also check the fuses.
This could be tricky as it may require the airbag to be disabled. I have not heard of this particular problem however somebody on our enthusiasts forum may be able to help! www.trailvoy.com all the answers for your Trailblazer
this could be due to a bad ground Wire running in the ignition
Suggest to the dealer there may be a TSB for the ignition switch. Seems to be related to crazy guages and "No Start" conditions.
If a 1987 Chevy Suburban has lights and horn, but no ignition, gauges, radio, or interior lights it could be a ground wire problem. It is possible that there is a short somewhere. Also check the dome light for a possible water leak in the headliner.
It could be as simple as the brakelight switch. www.trailvoy.com All the answers for your Envoy and Trailblazer