GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Regal 🢒 Body and Accessories 🢒 Seats 🢒 Lumbar Support Does Not Move In or Out

Step

Action

Value(s)

Yes

No

1

Did you review the Lumbar Support Description?

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Go to Step 2

Go to Symptoms - Seats

2
  1. Use a test lamp in order to backprobe the Lumbar Adjuster Switch connector D to ground:
  2. Move the lumbar switch to the AFT position.

Does the test lamp light?

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Go to Step 3

Go to Step 4

3
  1. Use a test lamp in order to backprobe the Lumbar Adjuster Switch connector C to ground .
  2. Move the lumbar switch to the Fore position.

Does the test lamp light?

--

Go to Step 5

Go to Step 4

4

Replace the Lumbar Adjuster Switch. Refer to Lumbar Switch Replacement .

Is the repair complete?

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Go to Step 10

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5
  1. Use a test lamp in order to backprobe the Lumbar Adjuster Relay connector B to ground.
  2. Move the appropriate Lumbar Adjuster Switch to the AFT position.

Does the test lamp light?

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Go to Step 6

Go to Step 7

6
  1. Use a test lamp in order to backprobe the Lumbar Adjuster Relay connector E to ground.
  2. Move the Lumbar Adjuster Switch to the Fore position.

Does the test lamp light?

--

Go to Step 8

Go to Step 7

7

Replace the Lumbar Support Relay .

Is the repair complete?

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Go to Step 11

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8
  1. Use a test lamp in order to backprobe the Lumbar Motor connector A to ground.
  2. Move the Lumbar Switch to the AFT position.

Does the test lamp light?

--

Go to Step 10

Go to Step 9

9
  1. Use a test lamp in order to backprobe the Lumbar Support Motor connector B to ground.
  2. Move the Lumbar switch to the Fore position.

Does the test lamp light?

--

Go to Step 10

Go to Step 11

10

Replace the Fore/AFT Lumbar Support Motor. Refer to Front Seat Lumbar Support Replacement .

Is the repair complete?

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Go to Step 11

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11

Verify that the system operates properly .

Does the system operate properly ?

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System OK

Go to Symptoms - Seats