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 DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSELECTRICAL COMPONENT LOCATIONSELECTRICAL COMPONENT LOCATORCONTROL UNITS
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Control Units
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Control Units
CONTROL UNITS
| Component | Component Location |
|---|---|
| Accelerator Pedal Position Module (6.5L VIN F & S) | Part of accelerator pedal. |
| Air Bag Driver Inflator Module | At top of steering column. |
| Audio Alarm Module | On convenience center. |
| Automatic Transfer Case Control Module | Behind left side of dash. |
| Auxiliary Heater & A/C Control Switch Module (Front) | In front of overhead console. |
| Auxiliary Heater & A/C Control Switch Module (Rear) | In rear of overhead console molding, in headliner. |
| Auxiliary Heater & A/C Logic Module | In rear of overhead console molding, in headliner. |
| Cruise Control Module | In left rear of engine compartment, on firewall. |
| Daytime Running Lamp (DRL) Module | Behind left side of dash, taped to panel wiring harness. |
| Door Lock Control Module | In front of left rear wheelhouse. |
| Electronic Brake Control Module (EBCM) | On left side of engine compartment. |
| Electronic Variable Orifice (EVO)/ Passlock Control Module | Under center of dash. |
| Fuel Pump Balance Module | Inside left side frame rail. |
| Fuel Solenoid Driver (6.5L VIN F & S) | On injection pump, on top front of engine. See Figure. |
| Glow Plug Control Module (6.5L VIN F & S) | On left rear of intake manifold. |
| Heated Seat Module | Under each respective power seat. |
| Ignition Control Module (4.3L VIN W) | On right side, rear of engine. See Figure. |
| Ignition Control Module (5.0L VIN M & 5.7L VIN R) | On right side, rear of engine. See Figure. |
| Ignition Control Module (7.4L VIN J) | On right side, rear of engine. See Figure. |
| Inflatable Restraint Sensing and Diagnostic Module | Under driver's seat carpet. |
| Interior Lamp Control Module | Under center of dash. |
| Low Coolant Level Indicator Module (6.5L VIN F & S) | Behind center of dash. |
| Powertrain Control Module (PCM) (6.5L VIN F & S) | Behind right side of dash, near blower motor. See Figure. |
| Remote Control Door Lock Receiver | Behind center of dash. |
| Transfer Case Control Module (TCCM) | Under dash, on steering column support bracket. |
| Vehicle Control Module (VCM) (4.3L VIN W) | On left side of engine compartment. See Figure. |
| Vehicle Control Module (VCM) (5.0L VIN M & 5.7L VIN R) | On left side of engine compartment. See Figure. |
| Vehicle Control Module (VCM) (7.4L VIN J) | On left side of engine compartment. See Figure. |
| Wiper Motor Module (Front) | On firewall, behind wiper motor. |
| Wiper Motor Module (Rear) | On lower inner center of rear window. |
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.