Lumbar Support System Check. GMC Truck GMC C Sierra

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C Sierra - 2WD 🢒 Body and Accessories 🢒 Seats 🢒 Lumbar Support System Check

Step	Action	Normal Result(s)	Abnormal Result(s)*
1	Place the lumbar switch to the in/out position.	The lumbar support will move in/out with switch selection.	The lumbar support does not move in any direction. Refer to Lumbar Support Does Not Move In or Out .
2	Place the bolster switch to the in/out position.	The seat bolster will move in/out with switch selection.	The seat bolster does not move in any direction. Refer to Lumbar Support Does Not Move In or Out .
* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.

Step

Action

Normal Result(s)

Abnormal Result(s)*

Place the lumbar switch to the in/out position.

The lumbar support will move in/out with switch selection.

The lumbar support does not move in any direction.

Place the bolster switch to the in/out position.

The seat bolster will move in/out with switch selection.

The seat bolster does not move in any direction.

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.