GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Was A Diagnostic System Check Performed?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Test the Stop lamp Switch Output Circuit for an open going to Center High Mounted Stop Lamp.

Was an open found?

Go to Step 3

Go to Step 4

3

Repair open in the Stop lamp Switch Output Circuit. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

System OK

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4

Replace the lamp bulbs.

Is the repair complete?

System OK

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