2002 Chevrolet Trailblazer 4.2l Service 4x4 - 4WD Not Working - U1000, C0374, C0379, C0550

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Today we have a 2002 Chevrolet Trailblazer 4.2l 4x4 that has a Service 4WD message on the dash and the 4WD does not work. Let's see if we can figure out what is going on with this vehicle.

Codes:
u1000 - Critical Operating Parameter Has Not Been Associated
C0374 - Unable To Correct Sensed Wheel Slip
C0379 - Front Axle Control Circuit Short To Ground, Short To Voltage, Or An Open Circuit
C0550 - Critical Operational Parameters Stored In EEPROM Have Failed, Checksum Error

Tools Used:
Launch x431 Pro Mini 3.0:
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Support Group:   / 370367330293683  

Snap-on Zeus
https://www.snapon.com/EN/US/Diagnost...

CarDAQ Plus 3
https://www.aeswave.com/CarDAQ-Plus-3...

0:00 Intro
0:30 Code Scan
4:30 Looking At Live Data
7:00 Bidirectionally Controlling The Transfer Case
10:00 Turning The 4WD Light On
10:50 Trying To Control The Front Differential Lock
12:30 Looking In Repair Information At The TSB For C0550
13:35 Following The TSB And Removing The Fuse
15:10 Checking For Changes
16:08 Checking Wiring Diagrams
17:24 Bidirectionally Controlling The Transfer case Motor
19:58 New Dorman 599-113 Transfer case Module
20:50 New Module Installed
21:56 Scanning For Codes
23:36 Trying To Control The New Module
26:16 Reprogramming The Transfer Case Module With SPS
35:14 Testing To See If Reprogramming Worked!
36:26 Test Driving The Vehicle
38:06 Scanning For Codes!