What is this box on top of 16197427 PCM?

**95Z28A4** · 12-26-2021

Hi Everyone! First post.

I purchased a 16197427 PCM from a salvage yard for a Chevy 292 project. The donor vehicle was a 1994 4.3L S10 Blazer. It has a BHRJ memcal which I think means it came from a 4.3L CPI engine. The PCM has a box with a 32 pin connector attached to it. Anyone know the function of this box? I've searched and searched and cannot find an answer.

1994 S10 Blazer 16197427 BHRJ PCM with unknown box_1.jpg

**steveo** · 12-26-2021

could it be a separate transmission control module? i have seen ones from that era with a similar configuration but the shape is unfamiliar
suprised there's no part number or anything

**tayto** · 12-27-2021

Body control module?

**95Z28A4** · 12-27-2021

Originally Posted by steveo

could it be a separate transmission control module? i have seen ones from that era with a similar configuration but the shape is unfamiliar
suprised there's no part number or anything

Originally Posted by tayto

Body control module?

I thought about those, but after more googling I think it is s Transfer Case Control Module (TCCM) for the NV233. I'm satisfied that I won't need it for my conversion.