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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 904 (SEAT HEATING SYSTEM AND SEAT COOLING SYSTEM)
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Section 904 (Seat Heating System And Seat Cooling System)
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Section 904 (Seat Heating System And Seat Cooling System)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic Wiring Diagrams
- Heated/Cooled Seat Wiring Schematics
- Heated Seat- Driver (AN3 without KB6) Wiring Schematics
- Heated Seat- Passenger (AN3 without KB6) Wiring Schematics
- Heated/Cooled Seat Module Power and Ground (KB6) Wiring Schematics
- Heated/Cooled Seat- Driver (Z75 with KB6) Wiring Schematics
- Heated/Cooled Seat- Passenger (Z75 with KB6) Wiring Schematics
- Heated/Cooled Seat- Driver (X88 or Z88, with KB6) Wiring Schematics
- Heated/Cooled Seat- Passenger (X88 or Z88, with KB6) Wiring Schematics
- Heated Seat- Rear (KA6) Wiring Schematics
- Heated Seat- Rear (KA6 with HP2) Wiring Schematics
- Heated Seat- Driver (KA1) Wiring Schematics
- Heated Seat- Passenger (KA1) Wiring Schematics
- Heated Seat - Driver (SPO Heated Seats) Wiring Schematics
- Heated Seat - Passenger (SPO Heated Seats) Wiring Schematics
- Heated/Cooled Seat Wiring Schematics
- Diagnostic Information and Procedures
- Diagnostic Code Index
- DTC B1925 or B2170 (w/o HP2 with Memory)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B1925 or B2170 (Rear Seat)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B1925 or B2170 (HP2 or Dealer Installed, w/o Memory)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B1935 or B2180 (w/o HP2 with Memory)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B1935 or B2180 (HP2 w/o Memory)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B1935 or B2180 (Dealer Installed)
- DTC B2345 (w/o HP2 with Memory)
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B2345 (HP2 w/o Memory)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B2345 (Rear Seat)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B2345 (Dealer Installed)
- DTC B2425 or B2430 (w/o HP2 with Memory)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B2425 or B2430 (HP2 w/o Memory)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B2425 or B2430 (Rear Seat)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B2425 or B2430 (Dealer Installed)
- DTC B2435 or B2440 (w/o HP2 with Memory)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B2435 or B2440 (HP2 or Dealer Installed w/o Memory)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B2508 or B2509 (w/o HP2 with Memory)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B2508 or B2509 (HP2 w/o Memory)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B2508 or B2509 (Rear Seat)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B2508 or B2509 (Dealer Installed)
- Symptoms - Seat Heating and Cooling
- Heated Seat Inoperative (Chevrolet or GMC, KA1)
- Heated Seat Inoperative (Cadillac, KA1)
- Heated Seat Inoperative - Rear
- Heated/Cooled Seats Inoperative (Cadillac, KB6)
- Heated/Cooled Seats Inoperative (Chevrolet or GMC, KB6)
- Repair Instructions
- Front Seat Heater Switch Replacement
- Front Seat Heater Control Module Replacement (with HP2)
- Driver or Passenger Seat Back Cushion Heater Replacement (Tahoe with HP2)
- Driver or Passenger Seat Back Cushion Heater Replacement (without HP2)
- Driver or Passenger Seat Back Cushion Heater Replacement (Escalade with HP2)
- Driver or Passenger Seat Cushion Heater Replacement (with HP2)
- Driver or Passenger Seat Cushion Heater Replacement (without HP2)
- Rear Seat Heater Control Module Replacement
- Rear Seat Cushion Heater Replacement
- Driver or Passenger Seat Back Ventilation Heating and Cooling Blower Replacement
- Driver or Passenger Seat Cushion Ventilation Heating and Cooling Blower Replacement
- Driver Seat Cushion Ventilation Heating and Cooling Module Replacement
- Passenger Seat Cushion Ventilation Heating and Cooling Module Replacement
- Description and Operation
- Heated Seats Description and Operation (KA1)
- Heated Seats Description and Operation (KA6)
- Heated/Cooled Seats Description and Operation
- Notes
- Seat Ventilation Heating and Cooling Module Power and Ground
- Seat Ventilation Heating and Cooling Module
- Air Circulation
- Climate Control Seat System
- Memory Seat Module
- Modes of Operation
- Heated/Cooled Seat Switches and HVAC Control Module (Escalade)
- Heated/Cooled Seat Switch and Door Lock/Window Switch (Chevrolet and GMC)
- Temperature Sensors
- Heated Seat Operation
- Cooled Seat Operation and Blower Motors
RENDER: 1.0x
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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.