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.
2009 Hummer H3 L5-3.7LFACTORY OEM SERVICE PROCEDURE
Seat Temperature Control Module: Locations
Passenger Compartment/Roof Component Views
Driver Seat Components
1 - Heated Seat Element - Driver Back (KA1)
2 - Seat Lumbar Motor - Driver (AG1)
3 - Heated Seat Element - Driver Cushion (KA1)
4 - J306 (AG1)
5 - J312 (AG1)
6 - Fuse Holder Power Seat (AG1)
7 - X307 (AG1)
8 - X308
9 - Heated Seat Control Module - Driver (KA1)
10 - Inflatable Restraint Seat Position Sensor (SPS) - Driver
11 - Seat Adjuster Motor Assembly - Driver (AG1)
12 - Seat Adjuster Switch - Driver (AG1)
13 - Seat Lumbar Adjuster Switch - Driver (AG1)
14 - Seat Belt Buckle - Driver
Passenger Seat Components
1 - Inflatable Restraint Front Passenger Presence System (PPS) Module
2 - Heated Seat Element - Passenger Cushion (KA1)
3 - Seat Belt Buckle - Passenger X1
4 - Seat Belt Buckle - Passenger X2
5 - X320
6 - X315
7 - X318 (AG2)
8 - J341 (AG2)
9 - J316 (AG2)
10 - Inflatable Restraint Front Passenger Presence System (PPS) Sensor
11 - Inflatable Restraint Seat Position Sensor (SPS) - Passenger
12 - Seat Lumbar Motor - Passenger (AG2)
13 - Heated Seat Element - Passenger Back (KA1)
14 - Heated Seat Control Module - Passenger (KA1)
15 - Seat Adjuster Motor Assembly - Passenger (AG2)
16 - Seat Belt Buckle - Passenger
17 - Seat Lumbar Adjuster Switch - Passenger (AG2)
18 - Seat Adjuster Switch - Passenger (AG2)
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:
- • 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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