GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was A Diagnostic System Check Performed?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Test CKT 17C for an open going to Center High Mounted Stop Lamp.

Was an open found?

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Go to Step 3

Go to Step 4

3

Repair open in CKT 17C. Refer to Wiring Repairs in Wiring Systems. Is repair complete?

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System OK

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4

Replace Lamp bulbs.

Is repair complete?

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System OK

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