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 MANUALSCHEVROLET2000CAB & CHASSIS C2500, 6.5 F, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 921 (TRANSFER CASE - NVG 233-NP1 (TWO SPEED SELECTABLE))
2000 Chevrolet Cab & Chassis C2500, 6.5 F, Automatic
Section 921 (Transfer Case - NVG 233-NP1 (Two Speed SELECTABLE))
2000 Chevrolet Cab & Chassis C2500, 6.5 F, AutomaticSECTION Section 921 (Transfer Case - NVG 233-NP1 (Two Speed SELECTABLE))
WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Transfer Case
- Diagnostic System Check - Transfer Case
- Diagnostic Trouble Code (DTC) Displaying
- Diagnostic Trouble Code (DTC) Clearing
- Diagnostic Trouble Code (DTC) List
- DTC 001
- DTC 002
- DTC 003
- DTC 004
- Symptoms - Transfer Case
- Transfer Case Will Not Complete a Mode or Range Shift
- Transfer Case Shift Control Switch Inoperative or 4 Low Indicator Stuck On
- Transfer Case Shift Control Switch Indicator Always On - Two or More
- Transfer Case Shift Control Switch Indicator Inoperative - One or More
- Transfer Case Shift Control Switch Indicator Flashes and Returns to Original Mode
- Transfer Case Popping Noise
- Transfer Case Whine or Rumble Noise
- Transfer Case Growl or Grinding Noise
- Transfer Case Clunk in 2HI Only
- Transfer Case Clunk in 4HI
- Transfer Case Clunk in 4LO
- Transfer Case Shudder or Binding
- Transfer Case Will Not Shift
- Transfer Case Jumps Out of Gear
- Transfer Case Leak Diagnosis
- Repair Instructions
- Transfer Case Shield Replacement
- Transfer Case Fluid Replacement
- Transfer Case Vacuum Switch Replacement
- Transfer Case Motor/Encoder Replacement
- Transfer Case Speed Sensor Replacement
- Transfer Case Output Shaft Seal Replacement - Front
- Transfer Case Output Shaft Seal Replacement - Rear
- Transfer Case Assembly 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.