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Power Seat Inoperative (with memory)

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Power Seat Inoperative (with memory)

Step Action Yes No
Schematic Reference: Driver Seat Schematics 
Connector End View Reference: Power Seat Systems Connector End Views 
DEFINITION: All of the seat adjuster motors are inoperative, the lumbar and bolster motors may also be inoperative.
1 Did you perform the Power Seat Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Power Seat Systems 
2 Verify the condition is present.
Does the system operate normally?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3
  1. Install a scan tool.
  2. Observe the Seat Adjuster Switch parameters in the driver seat module (DSM) Input/Output data list.
Do all of the Seat Adjuster Switch parameters display Active?		 Go to Step 7  Go to Step 4 
4 Operate the seat adjuster switches in both directions.
Does the scan tool display the correct switch status parameters in relation to the actual switch positions?		 Go to Step 9  Go to Step 5 
5
  1. Disconnect the seat adjuster switch connector.
  2. Using a DMM test for battery voltage at the switch supply voltage circuit terminal in the harness connector.
Is battery voltage present on the switch supply voltage circuit?		 Go to Step 8  Go to Step 6 
6 Test the switch supply voltage circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 12  Go to Step 9 
7
  1. Disconnect the seat adjuster switch connector.
  2. Test the active switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 12  Go to Step 9 
8 Inspect for poor connections at the seat adjuster switch connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 12  Go to Step 10 
9 Inspect for poor connections at the DSM connectors. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 12  Go to Step 11 
10 Replace the seat adjuster switch. Refer to Seat Switch Replacement - Power 
Is the repair complete?		 Go to Step 12  -
11 Replace the DSM. Refer to Memory Seat Control Module Replacement .
Is the repair complete?		 Go to Step 12  -
12 Operate the system to verify the repair.
Did you correct the condition?		 System OK Go to Step 3 
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