Hummer H3 P0856 C0240 SRV 4WD Fault Brakes Traction Stability Repair Help - FIXED

Hummer H3 2009 with Ghost.
Starts and Runs, but errors in first couple of minutes resulting in errors recorded. Vehicle perfectly fine after. Reproducible on every start. No power loss or other issues after the error state.
When you start the H3, ABS and Brake lights come on. The items that don't work during the initial minues upon start are:
Brake lights (except for the center brake light), Blinkers, Windshield wipers, AC/Heat blower fan, and several dash controls like 4x4 buttons.
After about a minute or so (after startup), everything starts working and the dash lights disappear (errors) and the H3 then works without a problem. Rarely, although it happens, it's only the first minute after vehicle start. It has in the past done this during driving.
I have cleared codes and they come back. The brakes have also been purged, refilled, and bled. The battery is new and the battery cables have been cleaned properly.
I have pulled the ECBM cables and the BCM cables to reseat them while checking for any corrosion. Although perfect, I still sprayed with recommended electrical contact cleaner, but no difference observed.
Code scanner confirmed wheel speed sensors are working via live view. Seen a Range Rover with nearly same indications, but everything was resolved with the rear left speed sensor for $20 on amazon.
Any ideas?
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Yes - As strange as it might sound, replacing the stock battery connectors resolved the issues. This seems to be a common issue; however, the stock connectors were perfect (cleaned and no corrosion) and the battery terminals were perfectly cleaned as well. Once replacing the connectors with cheap $10 amazon connectors, the vehicle has had no more issues.

[@VoltageGoat]

Suggestions have been: Front Wheel hubs (speed sensors) - We have confirmed they are working and live data from the scanner shows speed as we drive. So, they are not open/shorted. A landrover tech said it could be intermittant; however, the problem would only throw codes if going more than 4mph. So, these errors make send IF moving the vehicle; however, the code is immediate on start up and happens 100% of the time (without moving).
Another suggestion was PCM/ECM; however, contacting 2 different companies that program/replace them indicated that the PCM would only affect the engine driveability and not the lights, horns, turn signals, a/c, etc.
BCM suspect. Have removed, reattached, cleaned contacts, reseated both cables several time, and found G320 (pulling passenger seat) and removed/cleaned/reattached. Problem still remains.

[@jacklopez6937]

Did you ever find the problem

[@VoltageGoat]

Yes - only as of last week. As strange as it might sound, replacing the stock battery connectors resolved the issues. This seems to be a common issue; however, the stock connectors were perfect (cleaned and no corrosion) and the battery terminals were perfectly cleaned as well. Once replacing the connectors with cheap $10 amazon connectors, the vehicle has had no more issues.

[@jacklopez6937]

@@VoltageGoatthank you very much I’ll give it a try

[@alakrang.7775]

I have the codes for stability track , abs , brake fluid….. this problem started after I replace a front passenger caliper , but when rains the water come in to the interior and wet the floor….. what do you think????

[@alakrang.7775]

Any answer?

[@sheltonberry8382]

​@alakrang.7775 I have the issue with ABS and stab control system when it rains. I have a sunroof. Any suggestions?