NEED HELP IPC Not Displaying Gear or Mileage

southsidesmoka

Original poster
Member
Jul 21, 2018
121
Columbia, SC
Does anybody have any experience with fixing failed electronic components in the IPC of a 2003-ish TrailBlazer LS (no DIC)? I've tried cleaning the wiring harness contacts with electronics cleaner and checking for loose connections to no avail. All of my gauges are functional; I do, however, have a few burned out bulbs that need replacing. My concern is the two digital panels that display the current transmission gear and the odometer reading - neither is functioning. From a little research, I'm thinking the power-driver MOSFET (an LL2705, as in the GMT800 IPCs) has burned-out/failed. I've been building boutique guitar pedals for over 20 years - my soldering skills are considerable. In short, I don't want to spend the $200 - $300 on a rebuilt IPC if I can repair mine for less than $10 on parts and my own labor. What I need to know is whether or not I am aiming my soldering iron at the right component. Before I rip the dash open (again) and disassemble the IPC for troubleshooting, I wanted the thoughts, opinions and advice of my TrailBlazer family and friends. Thank you for reading and thanks in advance for any and all advice.

- southsidesmoka
 

Forum Statistics

Threads
23,272
Posts
637,482
Members
18,472
Latest member
MissCrutcher

Members Online