GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the entire Exterior Lights System Check performed?

--

Go to Step 2

Go to Exterior Lights System Check

2

Disconnect the stoplamp/BTSI switch connector C1.

Do the stoplamps turn off?

--

Go to Step 3

Go to Step 4

3

Replace the stoplamp/BTSI switch. Refer to Stop Lamp Switch Replacement in Brakes.

Is the stoplamp/BTSI switch replacement complete?

--

Go to Exterior Lights System Check

--

4

Repair the short to battery positive voltage (B+) in CKT 17 (WHT). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Exterior Lights System Check

--