[Anti_Rice_Guy]

Originally Posted by blk95formula

thats really odd....ive never heard of this before....is the temp. reading accurate? it is possible you are getting a false temp reading.....just a possibility

Must be at least somewhat accurate, because when it says it's overheating the check coolant light comes on, and the engine lets off way more heat waves/heat in general than under normal operation.

Originally Posted by Stevoone

Looked around on google a little, most people are talking about a HD clutch fan and some others are talking about the air shrouds. Someone mentioned a service bulletin but I don't have access to GM Service Information anymore.

The thermostat is on the water-pump assembly and the temp sensor is on the drivers side head. Is it possible that the engine is heating up unevenly? When you run with the plow and the increased load on the engine the block/heads may be heating up too fast to trip the thermostat. Not positive how you would fix that. lower temp thermostat, block heater or just continue to warm the truck up before you use it with the plow.

Interesting.

I'm going to try what Adam said about the fan tomorrow when the plow is on for the coming snowstorm.