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 MANUALSCHEVROLET2001SUBURBAN C1500REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 3 (TRANSFER CASE - NVG 236/246-NP8 (TWO SPEED AUTOMATIC) - SERVICE, REPAIR AND DIAGNOSTICS)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2001 Chevrolet Suburban C1500
Diagnostic Code Index
2001 Chevrolet Suburban C1500SECTION Diagnostic Code Index
WARNING: This page is about a different variant/trim than selected.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B2725 | System Detects Voltage Level Outside Range Produced When No Buttons Are Depressed |
| DTC C0300 | Rear Propshaft Input Indicates A Speed Low When Class 2 Data Bus Exceeds 10 MPH |
| DTC C0305 | Front Propshaft Input Indicates A Speed Low When Class 2 Data Bus Exceeds 10 MPH |
| DTC C0308 | Transfer Case Shift Control Module Senses Low Voltage Return In Motor Control A Or Motor Control B When High Voltage Is Expected |
| DTC C0309 | Transfer Case Shift Control Module Senses High Voltage In Motor Control A Or Motor Control B Circuits When Low Voltage Is Expected |
| DTC C0310 | Open In Motor Control A Or Motor Control B Circuits, Or Open Motor |
| DTC C0315 | Open In Module Ground Circuit |
| DTC C0323 | Open Lock Control Circuit Or Open Lock Feed |
| DTC C0324 | Shorted Lock Solenoid Coil, Or Lock Control Circuit Shorted To 12 V |
| DTC C0327 | Open, Short To Ground, Or A Short To Voltage In Encoder Feed Circuit, An Open In Signal Ground Circuit, An Open, Short To Ground, Or Short To Voltage In Encoder Channel Circuits |
| DTC C0362 | Transfer Case Shift Control Module Problem, Or Short To Voltage On 4WD LO Circuit |
| DTC C0367 | Shorted Actuator, Or Short To 12 V On Front Axle Control Circuit |
| DTC C0374 | Transfer Case Shift Control Module Unable To Correct Sensed Slip |
| DTC C0376 | Greater Than 20% Difference In Speed Sensor Inputs |
| DTC C0387 | Transfer Case Unable To Successfully Complete Shift To Requested Mode Or Range |
| DTC C0550 | Module Checksum Error, Or ROM/RAM Problem |
| DTC C0611 | Transfer Case Shift Control Module Did Not Receive A Valid VIN Digit For Correct Vehicle Application |
RENDER: 1.0x
NO RELATED
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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.