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.
2006 GMC Sierra 1500, 2D Pickup, 5.3 Z, 4WD, Part TimeFACTORY OEM SERVICE PROCEDURE
Data Link Connector Connector End View (DLC)
Data Link Connector (DLC)
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | - | - | Not Used |
| 2 | PU | 1132 | DLC Class 2 Serial Data |
| 3 | - | - | Not Used |
| 4 | BK | 1050 | Ground |
| 5 | BK/WH | 1851 | Ground |
| 6 | - | - | Not Used - w/o HP2 |
| TN/WH | 2500 | High Speed GM LAN Serial Data (+) - HP2 | |
| 7-13 | - | - | Not Used |
| 14 | - | - | Not Used - w/o HP2 |
| TN | 2501 | High Speed GM LAN Serial Data (-) - HP2 | |
| 15 | - | - | Not Used |
| 16 | OG | 640 | Battery Positive Voltage |
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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