2009 Hummer H3 V8-5.3LFACTORY OEM SERVICE PROCEDURE

Control Module: Locations




Front of Vehicle/Engine Compartment Component Views

Rear of the Engine Compartment Components (Left Hand Drive)

Factory service manual diagram



1 - Engine Control Module (ECM)
2 - Transmission Control Module (TCM)
3 - Windshield Wiper Motor
4 - Brake Fluid Reservoir
5 - Electronic Brake Control Module (EBCM) X2
6 - Electronic Brake Control Module (EBCM)
7 - Electronic Brake Control Module (EBCM) X1
8 - Brake Fluid Level Switch
9 - Hood Ajar Switch (N04)
10 - Hood Latch
11 - Engine Control Module (ECM) X3
12 - Engine Control Module (ECM) X2
13 - Engine Control Module (ECM) X1

Rear of Engine Compartment Components (Right Hand Drive)

Factory service manual diagram



1 - Windshield Wiper Motor
2162 - Transmission Control Module (TCM)
3 - Engine Control Module (ECM)
4 - Engine Control Module (ECM) X3
5 - Engine Control Module (ECM) X2
6 - Engine Control Module (ECM) X1
7 - A/C Refrigerant Pressure Sensor
8 - Hood Ajar Switch (N04)
9 - Hood Latch
10 - Brake Fluid Reservoir
11 - Electronic Brake Control Module X2
12 - Electronic Brake Control Module
13 - Electronic Brake Control Module X1
14 - Brake Fluid Level Switch
Factory Service Tools

Use the Manual With the Right Hardware

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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