Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSCHEVROLET2018SONIC PREMIER, 4D SEDAN, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 7 (COMPONENT CONNECTOR END VIEWS - K20 X3 LGZ TO K109)COMPONENT CONNECTOR END VIEWSK38A CHASSIS CONTROL MODULE - AUXILIARY
2018 Chevrolet Sonic Premier, 4D Sedan, Standard Trans
K38A Chassis Control Module - Auxiliary
2018 Chevrolet Sonic Premier, 4D Sedan, Standard TransSECTION K38A Chassis Control Module - Auxiliary
WARNING: This page is about a different car, the 2017 GMC Canyon and 2017 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
Connector Part Information
|
Terminal Part Information
| Terminal Type ID | Terminated Lead | Diagnostic Test Probe | Terminal Removal Tool | Service Terminal | Tray Name | Core Crimp | Insulation Crimp |
|---|---|---|---|---|---|---|---|
| I | Not Available | Not Available | Not Available | Not Available | Not Available | Not Available | Not Available |
| Pin | Size | Color | Circuit | Function | Terminal Type ID | Option |
|---|---|---|---|---|---|---|
| 1 | 2.5 | RD/VT | 1940 | Battery Positive Voltage | I | - |
| 2 | - | - | - | Not Occupied | - | - |
| 3 | 0.5 | YL/GN | 7122 | Axle Differential Lock Switch Signal | I | - |
| 4 | 0.5 | GN/RD | 7119 | Axle Differential Lock Mode Switch 5V Reference | I | - |
| 5 - 6 | - | - | - | Not Occupied | - | - |
| 7 | 0.5 | GN/BK | 7118 | Front Axle Differential Lock Low Reference | I | - |
| 8 - 9 | - | - | - | Not Occupied | - | - |
| 10 | 0.5 | VT/BK | 7121 | Rear Axle Differential Lock Low Reference | I | - |
| 11 | 0.5 | YE | 7115 | Rear Axle Differential Lock Indicator Control | I | - |
| 12 | 0.5 | VT/GY | 7117 | Front Axle Differential Lock Indicator Control | I | - |
| 13 | 2.5 | BK | 650 | Ground | I | - |
| 14 | 0.5 | VT/YE | 5985 | Accessory Wakeup Serial Data | I | - |
| 15 | 0.5 | BU/BK | 7116 | Front Axle Differential Lock Control | I | - |
| 16 | 0.5 | BU/RD | 7632 | Integrated Trailer Brake Controller Switch 5V Reference | I | - |
| 17 | 0.5 | BU/WH | 7120 | Rear Axle Differential Lock Control | I | - |
| 18 | 0.5 | BN | 7634 | Integrated Trailer Brake Controller Redundant Manual Apply Signal | I | - |
| 19 | 0.5 | BK/BN | 7631 | Integrated Trailer Brake Controller Switch Low Reference | I | - |
| 20 | 0.5 | YE | 7635 | Integrated Trailer Brake Controller Manual Apply Signal | I | - |
| 21 | 0.5 | GN/BK | 7633 | Integrated Trailer Brake Controller User Gain Signal | I | - |
| 22 | 0.5 | YE/BK | 2224 | Trailer Brake Enable Signal | I | - |
| 23 | 0.5 | WH/BK | 2223 | Trailer Brake Control Signal | I | - |
| 24 | - | - | - | Not Occupied | - | - |
| 25 | 0.15 | VT/GY | 139 | Run/Crank Ignition 1 Voltage | I | - |
| 26 | 0.5 | L-BU | 2500 | High Speed GMLAN Serial Data (+) 1 | I | - |
| 27 | 0.5 | L-BU | 2500 | High Speed GMLAN Serial Data (+) 1 | I | - |
| 28 | 0.5 | WH | 2501 | High Speed GMLAN Serial Data (-) 1 | I | - |
| 29 | 0.5 | WH | 2501 | High Speed GMLAN Serial Data (-) 1 | I | - |
| 30 | 0.5 | GN/VT | 4114 | Local Interconnect Network Serial Data Bus 14 | I | - |
| 31 - 33 | - | - | - | Not Occupied | - | - |
| 34 | 0.5 | GN/BK | 7118 | Front Axle Differential Lock Low Reference | I | - |
| 35 | 0.5 | VT/BK | 7121 | Rear Axle Differential Lock Low Reference | I | - |
| 36 | 0.5 | BU/BL | 7116 | Front Axle Differential Lock Control | I | - |
| 37 | 0.5 | BU/WT | 7120 | Rear Axle Differential Lock Control | I | - |
| 38 | - | - | - | Not Occupied | - | - |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.