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.
2021 GMC Terrain SLFACTORY OEM SERVICE PROCEDURE
K39 Liftgate Control Module X2 (TB5)
Connector Part Information
|
Terminal Part Information
| Terminal Type ID | Terminated Lead | Diagnostic Test Probe | Terminal Removal Tool |
|---|---|---|---|
| I | Not required | J-35616-4A (PU) | No Tool Required |
| Pin | Size | Color | Circuit | Function | Terminal Type ID | Option |
|---|---|---|---|---|---|---|
| 1 | 1 | BU / GY | 4682 | Rear Closure Cinch Latch Motor Release Control | I | - |
| 2 | 1 | BN | 4681 | Rear Closure Cinch Latch Motor Cinch Control | I | - |
| 3 | - | - | - | Not Occupied | - | - |
| 4 | 0.35 0.5 |
RD / GN RD / GN |
2440 2440 |
Battery Positive Voltage Battery Positive Voltage |
I I |
TB5-TC2-UEU UEU |
| 5 | - | - | - | Not Occupied | - | - |
| 6 | 2.5 | BK | 2550 | Ground | I | (TC2/TB5) |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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