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Thread: LMM: Temps when towing
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Old 07-23-2018, 08:21 PM   #12 (permalink)
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oldschoolbowtie's Avatar
Join Date: Jun 2017
Location: Orlando Fl
Posts: 911

Originally Posted by RailRiderHD View Post
Anyone? I had the clutch fan changes and coolant flushed and it was even worse on the tow home got up to 233 and i let off because i was scared of overheating? Is this normal? I thought fan kicked on at 228
This is why GM built a "buffer" into the factory temp indication on dash. The truck is a monster and when towing some variation in temperature is normal. I watched the CTS 2 go from 205 to 225 and factory needle didn't move but say a millimeter or so. 230 on a grade or running hard aint gonna hurt as long as it comes back when you let off.

The clutch fan is not a precision instrumented piece of gear.

The other issue is there is a lot of hot coolant in the ole Duramax so it takes a minute to turn it back

when its cool make sure its got all the air vented out and is full

I am not thinking you have an issue especially if ambient temps are warm and you run hard or have a tune

make sure the stack is clean


2007.5 3500HD Silverado LTZ
Kennedy Custom Tune Banks Intake and 4 " exhaust, Air Dog 150, Leveled front end, aftermarket upper control arms, tie rod end sleeves, bypass oil filter, Pusher 3" "hot side" charger tube, aFe Turbo inlet pipe, PPE deep Trans Pan with temp gage, 2 low mod for front differential disable, PACBRAKE 5000# Air Bags with remote on board air...otherwise stock

1953 Chevy truck 496 2 NOS kits ...otherwise stock

1927 Roadster 383 2 NOS kits chassis car (street legal)// otherwise stock

Last edited by oldschoolbowtie; 07-23-2018 at 08:22 PM. Reason: sp-1
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