WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Electronic Brake Control Module (JL4) Connector End View

Courtesy of GENERAL MOTORS CORP.

Electronic Brake Control Module (JL4) Connector Parts Information

Connector Part Information

OEM: 13548538
Service: 19115671
Description: 33-Way F 0.64 GT280 Series Sealed (BK)

Terminal Part Information

Pins: 1, 13, 25, 38
Terminal/Tray: 15304720/19
Core/Insulation Crimp: 4/5
Release Tool/Test Probe: 15315247/J-35616-4A (PU)

Pins: 2-4, 6, 8-12, 14-16, 18-21, 24, 26-35, 37
Terminal/Tray: 7116-3703-02/14
Core/Insulation Crimp: 9/9
Release Tool/Test Probe: J-38125-215/J-35616-64B (L-BU)

Electronic Brake Control Module (JL4) Connector Terminal Identification

Pin	Wire Color	Circuit No.	Function
1	3 RD/BK	442	Battery Positive Voltage
2	0.5 GY	6044	5-Volt Reference
3	0.5 TN/BK	7334	Power Brake Booster Low Control
4	0.5 L-GN	6043	Steering Angle Sensor Signal
5	-	-	Not Used
6	0.5 D-GN	872	Right Front Wheel Speed Sensor Signal
7	-	-	Not Available
8	0.5 YE	6046	Steering Angle Sensor Phase A
9	0.5 GY	6044	5-Volt Reference
10	0.5 OG	6030	Brake Booster Vacuum Sensor Signal
11	0.5 D-GN/WH	817	Vehicle Speed Signal
12	0.5 OG/BK	6045	Low Reference
13	3 BK	2150	Ground
14	0.5 YE	2501	High Speed GMLAN Serial Data Bus-
15	0.5 TN	2501	High Speed GMLAN Serial Data Bus-
16	0.5 PU/WH	7333	Power Brake Booster High Control
17	-	-	Not Available
18	0.5 GY/WH	7065	Wheel Speed Sensor Supply Voltage Right Front
19	0.5 GY/BK	7128	Wheel Speed Sensor Supply Voltage Right Rear
20	0.5 TN	884	Left Rear Wheel Speed Sensor Signal
21	0.5 GY/WH	7064	Wheel Speed Sensor Supply Voltage Left Front
22-23	-	-	Not Available
24	0.5 L-GN/BK	6432	CAN Bus Low Serial Data
25	2 RD	1640	Battery Positive Voltage
26	0.5 YE/BK	2500	High Speed GMLAN Serial Data Bus+
27	0.5 TN/BK	2500	High Speed GMLAN Serial Data Bus+
28	0.5 YE/BK	6032	Low Reference
29	0.5 D-BU	6047	Steering Angle Sensor Phase B
30	0.5 TN	6048	Steering Angle Sensor Phase C
31	0.5 BN	882	Right Rear Wheel Speed Sensor Signal
32	0.5 D-GN	2087	5-Volt Reference
33	0.5 GY/BK	7127	Wheel Speed Sensor Supply Voltage Left Rear
34	0.5 L-BU/BK	830	Left Front Wheel Speed Sensor Signal
35	0.5 L-BU	5986	Serial Data Communication Enable
36	-	-	Not Available
37	0.5 TN/WH	6433	CAN Bus High Serial Data
38	3 BK	2150	Ground

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

Electronic Brake Control Module (JL4)

Use the Manual With the Right Hardware

When to See a Mechanic