http://www.gearhead-efi.com/Fuel-Injection/showthread.php?335-16188051-and-16181333-PCM-Information-EE-EEB

and

http://fbodytech.com/eex-tunerpro-definition/

dave w

I'm not familiar with Hawaii's Safety Check Program, is there an emission test with the safety checks?

Fixing any EFI error codes is a good plan.

If the 4.3 is still factory stock, a basic tune...

OBDII started in 1996, and has different wiring.

OBDI ALDL with 160 Baud will use Pin E.
OBDI ALDL with 8192 Baud will use Pin M.

Generally GM passenger cars started using OBD1 ALDL Pin M...

Yes, GM only. Most all 1990 - 1995 (except maybe some 1995 LT1 GM vehicles) Buick, Olds, Pontiac, Chevy, GMC, and even Cadillac will have the OBD1 ALDL connector with pins A, B, & M. Chevy and GMC...

One option would be to get an ALDL connector from a salvage yard vehicle that has Pins A, B, & C, to replace the existing ALDL connector. Remembering to connect old Pin E to new Pin M.

dave w

I would take a second look at the ALDL wiring. The '8625 only uses 3 wires to the ALDL; pin A, pin B, and pin M. Remove the unused wires from the ALDL.

It sometimes causes confusion with scan...