This is VERY interesting....post ECU reset....

Knightfall · July 21, 2017

So I disconnected the negative power cable on the ECU for about 15-20 minutes....I start the truck up, and:

1. I got the "open, then close driver window notification"

2. My temp says it's 32 outside. It's almost 80. Yes it says it's in F.

3. My radio never used to show song/station data. Now it does.

Thoughts? Any idea to fix the thermostat?

DCazares · July 21, 2017

it will fix itself, give it time to adjust.

Sierra706 · July 21, 2017

So I disconnected the negative power cable on the ECU for about 15-20 minutes....I start the truck up, and:

1. I got the "open, then close driver window notification"

2. My temp says it's 32 outside. It's almost 80. Yes it says it's in F.

3. My radio never used to show song/station data. Now it does.

Thoughts? Any idea to fix the thermostat?

Temp will auto adjust after driving

Sent from my iPhone using Tapatalk

dagwood2001 · July 21, 2017

Yea the temp thing is wierd. Only vehicle I've ever owned in my life that you had to drive around for 5-10 minutes before the ambient temp adjusted. Been that way on all 3 of my Silverados........

Oh, just out of curiosity if your screen didn't show song/station info before, what did it show? One little thing like that I've noticed is it mine only shows the Album artwork from my itunes if it's hardwire connected.........

Edited July 21, 2017 by dagwood2001

Knightfall · July 22, 2017

Yea the temp thing is wierd. Only vehicle I've ever owned in my life that you had to drive around for 5-10 minutes before the ambient temp adjusted. Been that way on all 3 of my Silverados........

Oh, just out of curiosity if your screen didn't show song/station info before, what did it show? One little thing like that I've noticed is it mine only shows the Album artwork from my itunes if it's hardwire connected.........

It just showed the numerical station, like 100.7 FM or something similar. Now below it it'll show song and artist and station name. I drove to the store and back, about 10 minutes each way, and it still was stuck on 32. I'll give it more time though. My main concern was the "lower and raise window" alert, which I read somewhere was a sign of an electrical problem? When I was placing the cable back on the post, it DID spark a little bit as I fitted it on and a tiny bit of what might be corrosion (size of maybe a big grain of sand) appeared on top of the post. I've never played with a car battery until now so I'm a little paranoid.

Silverado Steve · July 22, 2017

I believe you have to drive hwy speeds for 10-15 min for the display to correct itself according to the manual.

tbarn · July 22, 2017

The window motor/bcm needs to relearn stops. I assume you have a left side auto up/down.

Knightfall · July 22, 2017

Yeah, I have auto windows. Today the temp worked but had to reset the date an time. This is all very interesting. Very curious to see if my random little glitches ever happen again.