I will tell you that without a scan tool of some sort, you'll have a hard time getting your car to run correctly, & you're basically shooting in the dark when diagnosing problems.
A scan tool (scanmaster, turbolink, otc moniter, ect.) is by far the best investment you'll make in my opinion. Good luck
No. It can't tell you oil pressure or boost pressure either.
But it can tell you a lot: TPS, MAF, IAC, Coolant Temp, RPM, INT, BLM, KR, O2 volts, Malfunction Codes and in some versions O2 cross counts and injector PW I think.
A scan tool isn't a luxury, it's required to properly tune your Turbo Buick.
in one word, YES, its worth every penny. It tells you what you need to know about your engine, most importantly knock..which is what kills these engines soooo easily