Question about 2007 Chevrolet TrailBlazer SS
This is a fault in the fan speed sensor circuit. You may need to check the connector or replace this sensor. Remember to have someone clear the computer. Some defects will clear automatically and others need time or a scanner to clear.
Posted on Feb 23, 2012
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Posted on Jan 02, 2017
SOURCE: 2004 trailblazer, 2 wheel drive.
A couple of things come to mind. Double check the wiring at the fan clutch, check the whole harness, there is a known problem wth chaffing there. Is it a Dorman brand fan clutch? These have been known to be bad out of the box. The other thing that could be wrong is the actual speed sensor on the new fan clutch. Hope some of this helps.
Posted on May 31, 2011
This an indication of the fan clutch gone bad or a problem with the wiring harness. The computer controls the speed of the fan by engaging the clutch, without the speed sensor signal being present, the computer can't control the speed so the fan will only spin slowly. If you are driving in very hot weather or heavy traffic, you may encounter an overheating condition.
Posted on Aug 01, 2011
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