Lumbar Support Inoperative (w/o 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.
Lumbar Support Inoperative (w/o Memory)
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics , Passenger Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views |
|||
| 1 | Did you review the Lumbar System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Seats |
| 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 |
|
Go to Step 6 | Go to Step 4 |
| 4 | Test the motor control circuits for an open or short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 9 | Go to Step 5 |
| 5 | Inspect for poor connections at the lumbar switch. 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 9 | Go to Step 7 |
| 6 | Inspect for poor connections at the inoperative lumbar or torso motor. 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 9 | Go to Step 8 |
| 7 | Replace the lumbar switch. Refer to Lumbar Switch Replacement . | Go to Step 9 | - |
| 8 | Replace the lumbar support/torso bolster motor assembly. Refer to Lumbar Replacement - Front Seat . Is the repair complete? |
Go to Step 9 | - |
| 9 | Operate the system to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |