What kind of mass air flow sensor does it have? Is it attached to the intake, or is it black and round and in line with air cleaner to the intake? Also, a tech 1 or 2 is that scanner that GM has for vehicle diagnosis that will tell more than the codes in the car. It would tell the opeating data of the vehicle while it was running. The Tech 1 was for 1980 to about 1995 and the Tech 2 from about 1992 to 2009/10 It has been a long time, but I think that if you press off and warm at the same time that vehicle might have onboard diagnositics. You can scroll up and down the data list by pressing the temp up button.....I think