WARNING: This page is about a different car, the 2007 Saturn Ion Red Line, 2007 Saturn Ion 3, and 2007 Saturn Ion 2. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Data Link Connector (DLC) Connector End View

Courtesy of GENERAL MOTORS CORP.

Data Link Connector (DLC) Connector & Terminal Parts Information

Connector Part Information

OEM: 179631-1
Service: See Catalog
Description: 16-Way F (WH)

Terminal Part Information

Pins: 1, 2, 4, 5, 16
Terminal/Tray: 776001-1/16
Core/Insulation Crimp: E/C
Release Tool/Test Probe: 15315247/J-35616-2A (GY)

Pins: 6, 14
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit

Data Link Connector (DLC) Terminal Identification

Pin	Wire Color	Circuit No.	Function
1	D-GN	5060	Low Speed GMLAN Serial Data
2	PU	1807	Class 2 Serial Data
3	-	-	Not Used
4	BK	550	Ground
5	BK/WH	151	Ground
6	TN/WH	2500	High Speed GM LAN Serial Data Bus+ (2.2L, 2.4L)
7-13	-	-	Not Used
14	TN	2501	High Speed GM LAN Serial Data Bus- (2.2L, 2.4L)
15	-	-	Not Used
16	OG	40	Battery Positive Voltage

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.

Safety Warning

Data Link Connector (DLC)

Use the Manual With the Right Hardware

When to See a Mechanic

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