Tip & How-To about Chevrolet TrailBlazer
When ever you have a check engine light on the first thing to do is to have the computer scanned for codes, these codes will help in finding the problem, when ever the engine or trany or emmisions component fails the computer knows and stores a code or codes and then turns the light on, by scanning the computer and getting the codes, these code will tell you where the problems are with a code #, then with some diagnosing you can pin point the problem. to get the codes a scan tool is needed but most autopart stores will scan and give you the codes for free. so always start with the codes.
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