Plug in by fuse box
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Junior Member
Joined: Jul 2011
Posts: 27
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From: Rapid City, SD
Car: 1991 camaro RS
Engine: 305
Transmission: 700R4
Axle/Gears: Stock 273?
Plug in by fuse box
Is this the plug you use to "tune" it with a prom or whatever it's called? Or is something unplugged that I need to put back in
Supreme Member
Joined: Sep 2002
Posts: 9,192
Likes: 19
From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: Plug in by fuse box
It's the ALDL connector - it's for RETRIEVING the codes, not programming. To program, you have to physically remove the chip, and program a new chip to replace it with, in a small chip programmer that connects to your computer (since the factory chip is not to my knowledge "reprogrammable").
Supreme Member
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Joined: Mar 2009
Posts: 3,079
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From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: Plug in by fuse box
on 96+ OBDII vehicles, this port would be for retrieving codes, sensor data, and reflashing the pcm. however, 3rd gens are OBDI and have a read-only chip as camaronewbie mentioned.
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