Silverado 1500 2WD V8-6.0L Hybrid (2009)
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Heated Seats Description and Operation (See: Description and Operation/Heated Seats Description and Operation)
Electrical Information Reference
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Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics)
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Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics)
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Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics)
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Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Ignition ON, observe the appropriate scan tool Driver Door Switch or Passenger Door Switch parameters listed below while pressing and releasing
the appropriate switch. The readings should change between Inactive and Active.
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Seat Back Heat Mode Sw.
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Seat Heat Mode Sw.
‹› If not the specified values, refer to the Heated Seat Switch component test. If the heated seat switch tests normal, replace the appropriate door
lock/window switch.
2. If all scan tool parameters test normal and there are no DTCs set, replace the MSM.
3. If all heated seat functions operate normal and the heated seat switch indicators do not illuminate, refer to the Heated Seat Switch Indicators
component test.
Component Testing
Heated Seat Switch
1. Ignition OFF, disconnect the X4 harness connector at the appropriate door lock/window switch.
2. Test for infinite resistance between the signal circuits listed below and the low reference circuit terminal 4 with the switch in the open position.
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Seat back and cushion heat mode terminal 6
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Seat back only mode terminal 7
‹› If not the specified value, replace the heated seat switch.
3. Test for less than 2 Ω between the signal circuits listed below and the low reference circuit terminal 4 with the switch in the closed
position.
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Seat back and cushion heat mode terminal 6
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Seat back only mode terminal 7
‹› If greater than the specified range for any of the tests, replace the heated seat switch.
Heated Seat Switch Indicators
1. Ignition OFF, disconnect the X4 harness connector at the appropriate door lock/window switch.
2. Connect a 3 A fused jumper wire between the low reference circuit terminal 4 and ground.
3. Connect a test lamp between B+ and each control circuit listed below. The appropriate indicator should illuminate.
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Seat back and cushion mode indicator terminal 10
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Seat back only mode indicator terminal 11
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Low heat indicator terminal 9
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Medium heat indicator terminal 1
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High heat indicator terminal 2
‹› If any indicator does not illuminate, replace the heated seat switch.
4. If all indicators illuminate, replace the door lock/window switch.
Repair Instructions
