The 4 wheel drive with a turn knob control will

A common Siverado problem are ground connections underneath the drivers door. There's a group of 3 or 4 wires that bolt into the frame and the wire that grounds the front diff actuator breaks from stress.

Plenty of inet videos showing location and methods to fix.

Yes. The actuator motor can get stuck on the transfer case. You could wait for warmer weather or try tapping on the actuator with a hammer, lightly, to get it to disengage.

Make sure your brake lights work.
May be bad switch,the cruise control runs through the brake light switch by the brake pedal.

ECS is electronic controlled stability. It works with traction control when it is slippery and it does cause what you describe. It reduces the power to the engine and drive train. IT could be from ice build up on wheel sensors.

this might be important for you to know
Quote:

08-08-49-002: False Triggering of Low Coolant Level Warning Message (Reprogram HVAC Control Module) - (Feb 13, 2008)

Subject:
False Triggering Of Low Coolant Level Warning Message (Reprogram HVAC Control Module)

Models:
2007-2008 Chevrolet Silverado 2500 and 3500 Heavy Duty Series Only
2007-2008 GMC Sierra 2500 and 3500 Heavy Duty Series Only
with 6.6L Diesel Engine (VIN 6 -- RPO LMM)

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Condition
Some customers may comment that a "COOLANT LEVEL LOW ADD COOLANT" message is displayed in the Driver Information Center (DIC) even though the coolant level is normal.

Cause
This condition may be caused by a false reading during off-road driving or in high slush conditions.

Correction
Do This - Reprogram the HVAC control module.
Don't Do This - Do not replace the coolant level sensor, HVAC control module or radiator surge tank.


A revised calibration has been developed to address this condition. Technicians are to reprogram the Heating Ventilation and Air Conditioning (HVAC) control module with the latest software available on TIS2WEB. Refer to the Service Programming System procedures in SI. As always make sure your Tech 2 is updated with the latest software version.


Warranty Information
For vehicles repaired under warranty, use:
Labor: Operation D4707
Description: HVAC Control Head Module or Assembly Reprogramming with SPS
Labor Time: Use Published Labor Operation Time

You'll need to have someone with a scanner check the body computer for trouble codes.
The computer found a problem with the system.

I had a similar problem with my 98 k1500 , turned out the plastic actuator that works like a plunger was stuck and not engaging the 4 wheel drive. Its located in the front of the front diff. easy to replace.--gord

well typically is there is a noise when making a turn its caused by a bad cv-joint but if your having problems with the 4 wheel drive i would look at the linkage to the transfer case and make sure there is not to much play or bent or broke rods and stuff.

When the airbag light is on it means a fault has occurred in the system and the airbag diagnostic monitor has disabled the system, the most common problem that turns the light on is a break in the connection to the steering wheel mounted airbag, this is due to a rotating ribbon contact that breaks under the steering wheel that connects the airbag to the wiring harness and the diagnostic monitor, the part is called th clock spring contact, a coiled up ribbon electrical contact that turns with the wheel

It is due to the cold weather,The fluid is to thick when cold for the actuator to engage the 4wd.

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