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.
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HOMESERVICE MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 261 (ELECTRICAL COMPONENT LOCATOR)CONTROL UNITS
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Control Units
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Control Units
WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Blower Motor Control Processor (W/ Auto A/C) | Behind right side of dash, in HVAC module. See Figure . |
| Body Control Module (BCM) | Behind left side of dash, left of steering column. |
| Cruise Control Module (CCM) | Front of left strut tower. |
| Electronic Brake Control Module (EBCM) | At left side of engine compartment, near strut tower. |
| Heated Seat Control Module (Driver) | Below driver's seat. |
| Heated Seat Control Module (Front Passenger) | Below right front seat. |
| Ignition Control Module (ICM) (3.1L VIN J) | Top right side of engine. See Figure . |
| Ignition Control Module (ICM) (3.8L VIN K) | Top front of engine. |
| Ignition Control Module (ICM) (3.8L VIN 1) | Top front of engine. |
| Inflatable Restraint Sensing & Diagnostic Module (SDM) | Below carpet, under right front seat. |
| Powertrain Control Module (PCM) | Left front side of engine compartment, in air cleaner assembly. |
| Radio Antenna Module | On rear window header panel, above headliner. |
| Remote Control Door Lock Receiver (RCDLR) | Behind instrument cluster. |
| Sun Roof Module (Express Open) | Center rear of sun roof. |
| Vehicle Communication Interface Module (VCIM) | On rear of left rear wheelhouse. |
RENDER: 1.0x
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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.