Question about 2004 Hummer H2
Scan the ECM (computer) with a OBD 2 Scanner to see if there are any stored codes. If you have a bad "Knock Sensor" a code for it should be stored and you'll know. If there is a code stored for it, replace the sensor, CLEAR the code from the ECM and you'l be ok. But!!! If there are other codes, do the proper repairs to fix them too...
Posted on Sep 04, 2010
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Posted on Jan 02, 2017
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