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 LOOKUPSDTC INDEXTRANSFER CASE DTCS
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Transfer Case DTCS
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Transfer Case DTCS
TRANSFER CASE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| B0768 | SERVICE 4WD LIGHT CIRCUIT HIGH |
| B2725 | SELECT SWITCH CIRCUIT MALFUNCTION |
| C0300 | REAR SPEED SENSOR MALFUNCTION |
| C0305 | FRONT SPEED SENSOR MALFUNCTION |
| C0308 | SHIFT MOTOR CIRCUIT LOW |
| C0309 | SHIFT MOTOR CIRCUIT HIGH |
| C0310 | SHIFT MOTOR CIRCUIT OPEN |
| C0315 | SHIFT MOTOR GROUND CIRCUIT OPEN |
| C0323 | TRANSFER CASE LOCK CIRCUIT LOW |
| C0324 | TRANSFER CASE LOCK CIRCUIT HIGH |
| C0327 | ENCODER CIRCUIT MALFUNCTION |
| C0357 | PARK/NEUTRAL SWITCH CIRCUIT HIGH |
| C0362 | 4L DISCRETE OUTPUT CIRCUIT HIGH |
| C0367 | FRONT AXLE CONTROL CIRCUIT HIGH |
| C0374 | GENERAL SYSTEM MALFUNCTION |
| C0376 | FRONT/REAR DRIVE SHAFT SPEED MISMATCH |
| C0550 | ECU MALFUNCTION |
| C0611 | VIN INFORMATION ERROR |
| C0895 | DEVICE VOLTAGE MALFUNCTION |
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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.