Is the 3.4 liter gm engine an interference type motor?
Whether a 3.4L GM engine is an interference engine depends on the *specific* 3.4L GM engine. GM produced several 3.4L engines over the years, and they varied. Some were interference engines, and some were not.
You must specify the exact engine code (often found on a sticker on the engine block or in your owner's manual) to determine if it's interference or non-interference. Without that code, it's impossible to give a definitive answer.