Question about 2005 GMC Sierra 2500HD 4WD
Changed both knock sensors and the harness and clear codes, but then engine light comes back on after driving for about 20 minutes, with same codes 327 and 332.
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Posted on Jan 02, 2017
SOURCE: engine light/ knocking sensor
The knock sensor is for the timing advance on your envoy. It will not be related to your sparkplugs. Your knock sensor will be screwed into the engine block, or under the intake depending on model. The V8 engine is under the intake.
Posted on Apr 30, 2009
on my 1990 gmc its right be hind the starter its round and has a one wire plug becarful some have left hand treades and coolant willbe comn out i would do it while it was cold
Posted on May 31, 2009
SOURCE: 2003 GMC Sonoma 81000 miles
CODE PO155 - HO2S 21 BANK 2 SENSOR 1 HEATER CIRCUIT MALFUNCTION CONDITIONS.CHECK O2 SENSOR FUSE AND WIRING CRCUIT BEFORE BUYING A NEW HO2S.IF SENSOR BAD REPLACE IT.THEN YOU CAN CLEAR THE CODE.
Posted on Aug 19, 2011
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