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aaronthomas

i ve gota 05 vy commodore that sometimes is sticky or grinds a bit when you take off from a stationary start.it only lasts about 1 rotation. it has been professionally lowered and its not that low(no scraping with a full load), it also has the sport suspension which is rigid and the traction control.

Anon

You need to get the vehicle checked out by a mechanic as there is a list of possibilities.

The noise could be as a result of surface rust on the brake rotors - from the vehicle being parked outside at night, or after a wash, or the handbrake isn't releasing properly at first due to a sticky brake calliper piston or sliding pins.

The easiest way to trace the cause of the noise is to lift the vehicle safely off its wheels, before driving the car in the morning, then turn the wheels by hand to try reproduce the noise (with the engine switched off).

Some ABS/ESP pumps run a test cycle when the vehicle is started and sometimes this can be heard by the driver - which is a normal operating sound.

The safest thing to do is have a professional mechanic have a look at your vehicle to ensure it is safe to drive.