Component Testing
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the power brake booster actuator.
- Test for infinite ohms of resistance between the actuator terminal 1 and ground.
- If less than infinite ohms, replace the vacuum brake booster assembly.
- Test for 2-3 ohms of resistance between terminals 1 and 5 at the power brake booster actuator.
- If the test is infinite resistance, replace the vacuum brake booster assembly.