Wondering if I should buy a -Tactrix OBDII Easy Flash Cable from a friend of mine who recently sold his car.

My HHR has already been tune and will need a second one once I install my new 2.5 DP from zzp.

Or just rent the cable get the tune and return everything.

Thanks for your sugestions

 

That's your decision to make man - we can't make it for you. Sorry, to me it's like asking "should I go to the park or the beach today?".