LS Cooling Issue

[MotoWells]

Wow, first off let me thank you all for your support and willingness to help.

I am running a stock GM harness, with stock settings. Looks like GM recommends to wire the fans direct from the wire provided off fuse block (image from documentation attached).

I am using Dakota digital VHX gauges with the BIM controller, this pulls the data right off the GM ECU through ODB II port.

I am running the stock thermostat.

Bypassed heater with no positive outcome.

Bottom hose is hot, top hose is hot as are both hoses for heater. Sounds like the thermostat is operating properly?

Fans come on but only one speed. Not sure if they can do two stages.

Starting to think the radiator or fans, I will attempt another burp session with an even more aggressive angle. Should I replace the thermostat with lower setting, maybe 160?

One thought, I could pull off the shroud and the two fans that came with the radiator. Put one large fan on and see what happens.


Thanks everyone!