GM Service Manual Online
For 1990-2009 cars only

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Step

Action

Value(s)

Yes

No

1

Was the entire Brake Warning System Check performed?

--

Go to step 2

Go to Brake Warning System Check

2

  1. Connect scan tool.
  2. Select IPC.
  3. Check for DTC C1210.

Is DTC C1210 set current?

--

Go to step 3

Go to step 8

3

  1. Disconnect the brake fluid level switch.
  2. Connect a test lamp between the brake fluid level harness connector terminals A and B.
  3. Turn the ignition switch to RUN.

Did the test lamp lit?

--

Go to step 6

Go to step 4

4

  1. Connect the test lamp between the brake fluid level harness connector terminal B and ground.
  2. Ignition switch in RUN.

Is the test lamp lit?

--

Go to step 7

Go to step 5

5

Repair open in circuit 849 (PNK). If open, check for a short to positive voltage.

Is the repair complete?

--

Go to Brake Warning System Check

--

6

Replace brake fluid level switch.

Is repair complete?

--

Go to Brake Warning System Check

--

7

Repair open in circuit 51 (BLK/WHT). If open, check for a short to positive voltage.

Is the repair complete?

--

Go to Brake Warning System Check

--

8

Check instrument cluster BRAKE FLUID indicator and circuit for an open.

Is repair complete?

--

Go to Brake Warning System Check

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