Hey guys,

I'm finally taking the plunge to learn the obd1 chip reading and modifying.

Ive done a lot of factory flashing and tinkered with the obd2 stuff,

But given that we have 4 pre 96 Chevys here at our shop, and I want to learn how to do it myself.
(93 3500 7.4 4l80e crew cab flatbed,93 caprice wagon 5.7 tbi,1992 Buick roadmaster 5.7 tbi,transplanted into a 82 bread truck convertible car show cruiser,
and a 93 gmc 1500 with transplant 93 454 SS truck running gears)


I just ordered the APU1 Autoprom package and and a couple xtra chips and sockets to play with.


I'm sure I'll need little help

Thanks for all the info y'all provide.