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Old 06-26-2018, 08:34 AM
autojoe autojoe is offline
Join Date: Oct 2012
Posts: 56
autojoe Congratulations!  Your peers have given you enough reputation to put you into the fist level!

Default Viscous fan solus ultra

Looking for data pids and bi directional controls on a 2008 Chevy trailblazer 4.2 I think software is 17.4.
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Old 06-27-2018, 05:38 AM
Witsend Witsend is offline
Join Date: Nov 2012
Posts: 2,941
Witsend Made it to level 2!  Looks like you are on your way to becoming famous


You would think by 2008 that something as important as getting good air flow through a radiator that GM would monitor viscous fan clutch fan speed it would show an actual fan rpm and a desired fan rpm and % error that should not be above a certain threshold. Seems like a more important idea to have add 10 years ago than I phone App capability.
If there is a slight movement felt in the assembly theTurd might ultimately need the waterpump though. I had a 4.2 Envoy that belonged to MrsDiagnosis
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