1989 Engine & Emmsions H manual

[GM_Guy]

Something new on archive.org of interest to boxes;
If you havn't had a paper one in your hand I highly suggest you start just skimming/reading at the beginning of the manual. Once you get through it, the layout of this one will make sense to you.

https://archive.org/details/1989-for...me-h-car-truck

[gadget73]

I have a 1991 version that came with my current Mark VII. its a beast of a manual but it covers every model and engine combo.

[DerekTheGreat]

I've got one of those! I think mine is from 1988. Haven't cracked it in many years though.

[Tiggie]

I find this manual much more useful than a lot of the regular service manual. At least as far as the engine goes. I have a 1988 version. Also have a 2000 version for the truck but have never used it. It's stupid thick.

[GM_Guy]

And the EVTM. Especially the evtm. I also have the paper version of this that I got years ago when I still had the box. Even if you don't have an 89, download it, plenty of tidbits of info in it.