P0495 Fan Speed Too High Code - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

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  #1  
Old 12-10-2012, 09:40 AM
Royalwapiti Royalwapiti is offline
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2006 Chevy TrailBlazer LS EXT
Cranberry Red Metallic 4.2L I6 4X4
Join Date: Jan 2011
Location: IA
Posts: 68
P0495 Fan Speed Too High Code

I have a an 06 with 71,000 miles. Was towing a small aluminum trailer with a ATV on it (total weight 1,100 lbs) across New Mexico, lots of mountains and hills. My tranny would kickdown to a lower gear a sometimes I would be hitting 5000 rpms. I did not use cruise control so i could control the kickdowns, I would just slow down as I went up hills instead of maintain speed. I do not know the rpms when it kicked on. My check engine light came on but it spit out this code, P0495 Fan Speed Too High. I reset it in Guymon OK and 300 miles later in Kansas it came back on.

I reset it again now that I am home not towing a trailer. 75 miles around the city and it has not come back on.

Some history

I towed the trailer to Arizona in August heat and had my AC worked on while there. No issues. I came home without the trailer and had a tranny cooler added. The guy poked my radiator while doing it, so I got a brand new radiator. I assume he didn't touch my fan.

The temps during my latest drive was 30-50 degrees F so no AC was on and the Defrost was not on.

Is this the beginnings of the infamous Trailblazer Fan Clutch failure? I thought this was only the 02-03 models.
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  #2  
Old 12-10-2012, 10:09 AM
Ray Dockrey's Avatar
Ray Dockrey Ray Dockrey is offline
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2009 Chrysler PT Cruiser
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That would be my thoughts. And even though the fan clutch got an update it is still prone to failure. You could always go to the later years fan clutch. It is just the regular old fan clutch. It will set the light but you could have a tune done by PCM4less and they can turn the light off.
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  #3  
Old 12-11-2012, 08:36 AM
Royalwapiti Royalwapiti is offline
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2006 Chevy TrailBlazer LS EXT
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Thanks Ray.
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