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)
2001 Chevrolet Suburban C1500
Section 3 (Transfer Case - NVG 236/246-NP8 (Two Speed Automatic) - Service, Repair And Diagnostics)
2001 Chevrolet Suburban C1500SECTION Section 3 (Transfer Case - NVG 236/246-NP8 (Two Speed Automatic) - Service, Repair And Diagnostics)
WARNING: This page is about a different variant/trim than selected.
- Specifications
- Schematic Wiring Diagrams
- Component Locator
- Transfer Case Control Component Views
- Transfer Case Control Connector End Views
- Propshaft Speed Sensor - Front
- Propshaft Speed Sensor - Rear
- Front Axle Actuator
- Transfer Case Shift Control Module - C1
- Transfer Case Shift Control Module - C2
- Transfer Case Shift Control Switch - C1
- Transfer Case Shift Control Switch - C2
- Transfer Case - C1 (Encoder Motor)
- Transfer Case - C2 (Encoder Motor)
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Transfer Case
- Diagnostic System Check - Transfer Case
- Transfer Case Mechanical System Diagnosis
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Code Index
- Diagnostic Trouble Code (DTC) List
- DTC B2725
- DTC C0300
- DTC C0305
- DTC C0308
- DTC C0309
- DTC C0310
- DTC C0315
- DTC C0323
- DTC C0324
- DTC C0327
- DTC C0362
- DTC C0367
- DTC C0374
- DTC C0376
- DTC C0387
- DTC C0550
- DTC C0611
- Symptoms - Transfer Case
- Front Axle Will Not Engage
- Front Axle Will Not Disengage
- Transfer Case Will Not Complete a Mode or Range Shift
- Transfer Case Shift Control Switch Inoperative
- No Correction for Slip in All-Wheel Drive Mode
- Service Indicator Always On
- Service Indicator Inoperative
- Transfer Case Shift Control Switch Indicator Always On - Two or More
- Transfer Case Shift Control Switch Indicator Flashes, then Returns to Previous Mode
- Transfer Case Shift Control Switch Indicators Flash Continuously 15 Seconds or More
- Transfer Case Shift Control Switch Indicator Inoperative - One or More
- Repair Instructions
- Transfer Case Shield Replacement
- Transfer Case Fluid Replacement
- Transfer Case Motor/Encoder Replacement
- Transfer Case Speed Sensor Replacement (Front)
- Transfer Case Speed Sensor Replacement (Right Rear)
- Transfer Case Speed Sensor Replacement (Left Rear)
- Front Output Shaft Seal Replacement
- Rear Output Shaft Seal Replacement
- Transfer Case Assembly Replacement
- Input Shaft Seal Replacement
- Transfer Case Adapter Replacement
- Transfer Case Shift Control Switch Replacement
- Transfer Case Shift Control Module Replacement
- Description and Operation
- Special Tools and Equipment
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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.