The formal Breath Test, can be refused, but you will face a longer suspension period for this refusa

I highly recommend refusing both of these tests and making the government prove their case with as little evidence as possible. The chemical test is often times the strongest piece of evidence against you. Refusal to submit to a chemical test may result in an additional criminal charge against you. It is easier to refuse and fight the charges in Court than it is to dispute the result of the breath, blood, or urine test. Current Pennsylvania law makes it exceptionally difficult for defense attorneys to challenge a breath, blood, or urine test.