Terms and Conditions


If you find you aren’t happy with your tune for any reason, we will set your vehicle back to standard and refund your money in full.


GSM Diesel Tune warrant all their tunes against failure (ie if our tune causes your engine to fail, we will cover all repair/replacement cost). Conditions apply.


Some tunes may not be legal for street use in all Australian states. It is the client's responsibility to ensure that what they ask for is permitted.