GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Instrument Cluster System Check?

--

Go to Step 2

Go to Instrument Cluster System Check

2

Are the other interior illumination lamps functioning properly?

--

Go to Step 3

Go to Interior Lights Dimming System Check

3

Inspect CKT 390 (YEL) for an open or a short to ground.

Is the wiring OK?

--

Go to Step 4

Go to Step 5

4

Inspect the instrument cluster connector C1 terminal F5 (Buick) or connector C1 terminal C7 (Oldsmobile) for proper terminal contact.

Is the connection OK?

--

Go to Step 6

Go to Step 7

5

Repair the open or short in the circuit.

Is the repair complete?

--

Go to Instrument Cluster System Check

--

6

Replace the instrument cluster.

Is the replacement complete?

--

Go to Instrument Cluster System Check

--

7

Repair the poor connection.

Is the repair complete?

--

Go to Instrument Cluster System Check

--