Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic Aids
2006 Buick Terraza CXL, 3.5 L, AWDSECTION Diagnostic Aids
WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
- Repair any brake system related DTCs before performing this diagnostic.
- If a BCM has been replaced, the brake pedal position (BPP) sensor must be calibrated. Refer to Brake Pedal Position Sensor Calibration .
- For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections .
Cruise Control Switch Indicator Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Cruise Control Schematics Connector End View Reference: Cruise Control Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
Go to Step 5 | Go to Step 3 |
| 3 | Test the voltage signal circuit and the low reference circuit for an open, or for a high resistance. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 7 | Go to Step 4 |
| 4 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections
andConnector Repairs
. Did you find and correct the condition? |
Go to Step 7 | Go to Step 6 |
| 5 | Replace the cruise control switch. Refer to Multifunction, Turn Signal Switch Replacement
. Did you complete the replacement? |
Go to Step 7 | - |
| 6 | Replace the BCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
Go to Step 7 | - |
| 7 | Operate the system in order to verify the repair. Does the system operate properly? |
System OK | Go to Step 2 |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.