Question about Chevrolet TrailBlazer

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My 03 Trailblazer ( 4200- 6cyl) started running rough a couple of weeks ago. The service engine light came on so my wife took it to the local Advance Auto store and they scanned it and the following codes came up. 0172, 0301,0340,0128,and 1345. I replaced the thermostat and the cam position sensor and it didn't help. Any ideas before I torch the thing ?

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I don't know the codes But o2 sensors are a common code thorougher.. call dealer they may give you that these codes mean ..or a manual ..its indispensable..

Posted on Apr 01, 2011

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Posted on Jan 02, 2017

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