Where's the ECU and how hard is it to change?

Asked by raybranner Jul 25, 2015 at 03:48 PM about the 1989 GMC Sierra

Question type: Maintenance & Repair

I have an 1989 2500 with a 5.7 2wd. I'm not a mech. Got any tips or advice? A how to
video would be great

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Kelly answered about a year ago

The computer in that year Suburban should be directly above the glovebox. Open the glovebox and peer through the gap between the glovebox and the top of the dash and the computer should be staring you in the face. To remove, I think you remove the 3 bolts from the bottom hinge area of the glovebox and remove the glovebox. Then, pull the couple of retaining bolts off the computer, and then remove the connectors to the computer. It should fall out then.

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Where's the ECU and how hard is it to change?

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