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.
2003 Hummer H2FACTORY OEM SERVICE PROCEDURE
Data Link Connector (DLC)
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Data Link Connector (DLC) Connector Parts Information
Connector Part Information
|
Data Link Connector (DLC) Connector Terminal Identification
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| 1 | D-GN | 5060 | Low Speed GM LAN Serial Data (U32/U2K) |
| 2 | PU | 1807 | Class 2 Serial Data |
| 3 | - | - | Not Used |
| 4 | BK | 550 | Ground |
| 5 | BK/WH | 151 | Ground |
| 6 | TN/WH | 2500 | CAN High (HP7) |
| 7 | BN/WH | 2960 | Keyword Serial Data (Except HP7) |
| 8-11 | - | - | Not Used |
| 12 | WH/BK | 5043 | Keyword Serial Data (Except HP7) |
| 13 | - | - | Not Used |
| 14 | TN | 2501 | CAN Low (HP7) |
| 15 | - | - | Not Used |
| 16 | OG | 340 | 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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