Cooling fan speed high

Asked by Rachel Jul 09, 2018 at 10:58 PM about the 2005 Chevrolet Trailblazer LT 4WD

Question type: Maintenance & Repair

I was hauling a trailer from Chicago to middle of Michigan and I have a 2005
Trailblazer. It was great 90% of the trip. When I got about 45 mins out from
my destination my check engine light came on. Pulled over to Auto Zone and
they tested it and came up the code of "Cooling fan speed high"...there were
no suggestions to fix it. After a couple of hours I was getting back on the
expressway to come back to Chicago and the light went off. Then when I
was about 10 mins from home it came back on. I was wondering if it is
because on both occasions I was doing between 80-90 mph for a couple of
hours or if I need to replace my relay for the fan? The car was off for over 12
hours and the light is still on when I turn my car on. I need to go back to
Michigan Friday and come home Sunday.

2 Answers
11,615

FJ4072 answered 6 years ago

Your fan clutch is going out. When the light is on the fan is loud right?

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Susan answered 5 years ago

Just replaced mine it is a pain. Disconnected the battery to do it now my lights dont work. was told it is that my cpm needs reset now and auto zone says it is against the law so I have to pay some mechanic an arm and a leg to stroke my wallet.

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