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How serious is a check engine code for an o2 sensor on a 2005 gmc envoy?
Wiki User
∙ 15y ago
If you have the code you can change the sensor yourself. The sensor is located on the exhaust manifold. It sometimes is related to something else. For complete info and troubleshooting visit our enthusiasts forum at www.trailvoy.com
Wiki User
∙ 15y ago
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