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.
2007 Hummer H3 L5-3.7LFACTORY OEM SERVICE PROCEDURE
Information Bus: Locations
Data Communication Component Views
Behind Right Front Kick Panel
1 - Body Control Module (BCM)
2 - Body Control Module (BCM) C1 (Body Harness)
3 - Body Control Module (BCM) C2 (I/P Harness)
4 - C204 I/P Harness to Body Harness
I/P Harness Components
1 - C203 I/P Harness to HVAC Module Harness
2 - C205 I/P Harness to HVAC Module Harness
3 - Body Control Module (BCM) Connector
4 - C204 I/P Harness to Body Harness
5 - Trailer Blunt-Cut Harness Wires
6 - Data Link Connector (DLC)
7 - C208 I/P Harness to Body Harness
8 - C200 I/P Harness to Body Harness
9 - C207 I/P Harness to Body Harness
10 - C201 I/P Harness to Steering Column Harness
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.