I own a 1987 GMC Sierra and it has an ECU, I took it to a workshop to see if I've any issues, when they tried to connect a diagnostic reader to the connector (underneath the steering wheel) they couldn't. So they told me to replace the connector as its bad.

Does anyone knows the part number for this connector?

Edit 1

Followed comment link and was able to pull an error code

Error Code 44

  • 1
    That seems odd. Unless the ALDL is physically broken it's just a connector with pins in it. It's also easy to repin and just as much labor as replacing the connector. Maybe there are underlying issues with the serial data bus or power/ground circuit. You may want to have it checked somewhere else first.
    – Ben
    Mar 21, 2016 at 21:03
  • 1
    Can you try this process to see what codes you pull up? Or if you can pull up any codes? Mar 21, 2016 at 21:44
  • They tried to connect the code reader it won't show anything
    – user15878
    Mar 26, 2016 at 16:17
  • Paulster, I saw the video and I did it, it shows 44, thx Paulster.
    – user15878
    Mar 26, 2016 at 17:14


You must log in to answer this question.

Browse other questions tagged .