Matt, welcome to the forum. Please check where you're posting before doing so. I moved your post to an appropriate section.

 

Many of us run an OBD-II gauge to see what the dash is actually telling us. The gauges are for general info not accuracy. My engine coolant gauge will show 180 when my iDash shows 118. Once the engine gets to normal operating temp, the gauges are closer. Also, with the variable output oil pump, the needle would be swinging wildly if the increment was 0-60. It changes quite a bit based on need.

As for the elevated idle, I have mine on but have yet to see it hit 1050-1100 even on these cold mornings (teens). It does increase but I'm generally seeing 850-900 rpm. The engine heat doesn't build quickly at idle and takes a mile of driving or so to get above 120. I hate scraping, too, but I'll be doing that in a couple of hours.

 

I don't believe that the 3.0 elevated idle goes to same 1050 that the 6.6 goes to.

Mine seems to go to about 900 or 950.

3.0L supplement talks about increased idle speeds that can vary between 600 and 1000.

3.0 supplement:
Under certain conditions the engine idle speed can vary or be elevated.
Change in idle speed is normal and does not indicate a problem. Normal
conditions that can raise idle speed are low voltage, DPF regeneration,
air conditioning compressor loads, and engine warmup. These speeds
can range from approximately 600 to 1000 rpm.

 

At 9F this morning it did hit 1000 rpm idle for the first time. After a 16 mile drive to work, the coolant temp was only 178. Usually, it’s 210 long before I get there. Be glad when this crap goes away.

 

Can the iDash show more than one coolant temp sensor?

There must be several, so that truck can manage the coolant valve.

 

Can the iDash show more than one coolant temp sensor?

There must be several, so that truck can manage the coolant valve.

There are three listed under the 3.0 profile...Engine Coolant Temp, ECT1 and ECT2. But Engine Coolant Temp and ECT1 are the same sensor. There is a difference between ECT1 and ECT2. ECT2 ramps up quickly and is much higher (20-40 degs) than ECT1. And that was just on a 5 miles trip back home from Cabelas. While ECT1 stayed close to 200-210, ECT2 was up in the 240's while at highway speeds. Dropped to 220's at a stop. Outside air temp was 30-32.

 

do they come with a winter front like the 6.6?

 

No winter front, but they do have active shutters.

 

There is one suggestion I have about this elevated ide,,, actually 2 first I wish that would stop over thinking simple things. One being, let the inside cab heater come on like they use to when remote started. I can assure you that 32 degrees on up of engine temp will atheist start defrosting the windows all around if the heater was on. So GM !!! NEXT update turn it on and let us deal with real weather!! Simple fix!! Secondly why not put in the screen under the underthought elevated idle choice, a few options like elevated to say 800, or 1000, or 1150 or so, so we can get moving. All can be done with a simple program,, imagine that, a real fix!

 

Why do you not use the remote start?