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 MANUALSCHEVROLET2012CHEVY EXPRESS G2500, VAN PASSENGER, 4.8L ENG VIN AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 624 (MANUAL TRANSMISSION - ZF S6-650)
2012 Chevrolet Chevy Express G2500, Van Passenger, 4.8L Eng VIN A
Section 624 (Manual Transmission - ZF S6-650)
2012 Chevrolet Chevy Express G2500, Van Passenger, 4.8L Eng VIN ASECTION Section 624 (Manual Transmission - ZF S6-650)
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. 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-Manual Transmission
- Diagnostic System Check-Manual Transmission
- Transmission Scan Tool Data List
- Transmission Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) Type Definitions
- Diagnostic Trouble Code (DTC) List/Type
- DTC P0500 (8.1L): Vehicle Speed
- DTC P0500 (6.6L): Vehicle Speed
- DTC P0704 (8.1L): 7 Changes In Vehicle Speed Without PCM Detecting A Clutch Pedal Transition
- DTC P0833 (6.6L): 7 Changes In Vehicle Speed Without PCM Detecting A Clutch Pedal Transition
- Symptoms-Manual Transmission
- Transmission Shifts Hard
- Gear Clash When Shifting Gears
- Transmission Noisy
- Transmission Does Not Shift into One Gear
- Transmission Locked in One Gear
- Transmission Jumps Out of Gear
- Clunk on Acceleration or Deceleration
- Transmission Fluid Leak Diagnosis
- Repair Instructions
- Transmission Fluid Replacement
- Control Lever and/or Boot Replacement
- Shift Lever Assembly Replacement
- Vehicle Speed Sensor (VSS) Replacement
- Transmission Mount Replacement
- Transmission Input Shaft Seal Replacement
- Transmission Output Shaft Seal Replacement
- Backup Lamp Switch Replacement
- Transmission Replacement
- Description and Operation
- Special Tools and Equipment
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Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.