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With a scan tool.
The same as you do in the 1968 Buick Wildcat
Running light does not work what is the problem
where is the daytime running light relay located on a 2002 chevy cavalier
The diagnostic code 410, on your 2004 Chevrolet trailblazer, is a reference to a vacuum hose problem. Check the vacuum hoses to make sure they are all connected.
Time to change your oil in your engine!
probably an o2 sensor go to a shop or advance and have the light checked
i changed the running light bulbs (3 of 4 are out) on Chevy 2005 trailblazer, and they still don't come light up?
See this thread. http://forums.trailvoy.com/showthread.php?t=51217
check wiring harness also check for any possable leakage
It comes on when you need to change the oil.
The Chevrolet Colorado brake light switch is quite simple to change. The brake light switch simply plugs in and out.