It is not a digital file. It is a book 3 inches thick. However, there is a website that has the exploded diagrams from the book already loaded, but you have to get to each one through hierarchical menu choices. But it is good. Here is an example of one of the pages of the site. Notice above the diagram that there is a nice map of their menu system, so you can select any part of the car you want.
http://www.gmpartsgiant.com/components/1989-pontiac-firebird~engine-asm-3-8l-v6-turbocharged-2f000020100-lc2mw92fw87.html
Otherwise, use this link and find what you need, but be sure you select on of the sub menus that pertain to the 3.8 7 motor. Because even though that motor was already selected, it will still have diagrams for other motors.
http://www.gmpartsgiant.com/code/1989-pontiac-firebird-lc2mw92fw87.html
EDIT: I have been comparing the numbers in my book to the numbers on the website and they are not all the same. THe exploded diagrams are obviously copied right from the book but the part numbers are not necessarily. In the book the part has a group number, then you turn to the beginning of the book where all the groups are listed and you see which part number applies exactly. For example on the website, lets say it gives a part number for a power antenna. Well in the book, there are three possibilities for that part number. THe production part number, the service part number, and one other number. None of those match what the website gives for the same part. Maybe the website has a newer number or maybe they are listing a part that fits and functions but is not the original part number. If you built a car with all their part numbers, and it was a corvette, you would never get a good NCRS score. Part numbers matter. THey affect value. So there it is. Perhaps the website isn't that good after all. After all, their motive is to sell parts...THEIR parts. So they will list what they have. Unfortunately it isn't a site made solely to cater to a bunch of nuts who love 20 year old white v6 automatic trans ams.
The book I have has other part numbers listed that are of interest, besides just the exploded diagrams. If you are doing a car over, just spend the 30-70 dollars on the book. It will pay for itself by the time you buy your first part. It is called:
1982-1989 PONTIAC "F" Firebird parts and illustration Catalogue effective may, 1989
They also have one from 1982 to 1990, 1982-1991, and 1982-1992. The last one is the most desirable.
I can't possibly scan the book though It' s too big. Just ask me to look something up if you are stuck.
For a body job you should buy the body manual. For a frame off restoration you should have the body manual, the parts and illustration manual, the assembly manual and the shop manual too. There is also a chassis manual, and a convertible top manual. The service bulletins are nice to have also. They publish things that should be in the shop manual but weren't known in time to put them in the shop manual. Service bulletins come every month after a car is released, and continue to come for several years afterwards, as the problems present themselves. For example, I read in one of these service bulletins, that there is a way to stop the rear brakes from groaning when you back up. Imagine that. In fact there were two bulletins on it, and two fixes. The first fix was a new bracket (the one that holds the caliper on the axle). That fix was a pain to do because the axles had to come out. THen, a few months later they developed a damper which just bolts on. Only takes ten minutes to do. I always thought that the groaning was just what these cars do, but there is a fix. (I had at least 8 Trans ams with rear discs and they all do this groaning/vibration when you back up and apply the brakes lightly. My drum brake 91 ragtop did not make the noise.)
Since I doubt the dampers are sold anymore at the dealer, I assume that this fix was incorporated into the production of new cars, so should be available on disc brake cars in the junkyards. I don't remember when the fix came about. either 1990 or 1991 I think.
