2009 Hummer H3T Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Electrical Component Locator: Miscellaneous

MISCELLANEOUS LOCATION

Component Location
Audio Amplifier (H3) Mounted next to subwoofer. See Figure.
Audio Amplifier (H3T) Mounted next to subwoofer. See Figure.
Battery Left side of engine compartment. See Figure.
Blower Motor Resistor Assembly Attached to bottom of blower. See Figure.
Cellular Microphone Mounted in left front headliner. See Figure.
Cellular, Navigation & Digital Radio Antenna Mounted to right front roof area. See Figure.
Data Link Connector (DLC) Left side of dash. See Figure.
Digital Radio Receiver Right side of dash. See Figure.
Generator (3.7L) At left front of engine. See Figure.
Generator (5.3L) Front of engine. See Figure.
Global Positioning System (GPS) Antenna Behind right dash cluster.
Heater Element Seat Back - Driver (1) In driver seat back. See Figure.
Heater Element Seat Back - Passenger (13) In passenger seat back. See Figure.
Heater Element Seat Cushion - Driver (3) In driver seat bottom. See Figure.
Heater Element Seat Cushion - Passenger (2) In passenger seat bottom. See Figure.
Horn (5) Front of vehicle, behind grill. See Figure.
Ignition Coil 1 (3.7L) In center front of cam cover at No. 1 cylinder. See Figure.
Ignition Coil 1 (5.3L) Top of cylinder head, above cylinder #1. See Figure.
Ignition Coil 2 (3.7L) In center front of cam cover at No. 2 cylinder. See Figure.
Ignition Coil 2 (5.3L) Top of cylinder head, above cylinder #2. See Figure.
Ignition Coil 3 (3.7L) In center front of cam cover at No. 3 cylinder. See Figure.
Ignition Coil 3 (5.3L) Top of cylinder head, above cylinder #3. See Figure.
Ignition Coil 4 (3.7L) In center front of cam cover at No. 4 cylinder. See Figure.
Ignition Coil 4 (5.3L) Top of cylinder head, above cylinder #4. See Figure.
Ignition Coil 5 (3.7L) In center front of cam cover at No. 5 cylinder. See Figure.
Ignition Coil 5 (5.3L) Top of cylinder head, above cylinder #5. See Figure.
Ignition Coil 6 (5.3L) Top of cylinder head, above cylinder #6. See Figure.
Ignition Coil 7 (5.3L) Top of cylinder head, above cylinder #7. See Figure.
Ignition Coil 8 (5.3L) Top of cylinder head, above cylinder #8. See Figure.
Inflatable Restraint Steering Wheel Module Coil (1) Mounted to steering wheel. See Figure.
Seat Belt Pretensioner - LF At left inner "B" pillar. See Figure.
Seat Belt Pretensioner - RF At right inner "B" pillar. See Figure.
Seat Belt Switch - Left Part of seat belt buckle (Driver).
Seat Belt Switch - Right Part of seat belt buckle (Passenger).
Throttle Body (2) Top of engine, mounted on upper air intake manifold. See Figure.
Throttle Body (5.3L) Top of engine. See Figure.
Trailer Connector Mounted on left side of trailer receiver, rear of vehicle. See Figure.
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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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