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  1. C

    A brake job rabbit hole

    This truck lived its whole live in NE Ohio. Unfortunately the brake fluid was probably never changed and then it sat for the most part for the last few years
  2. C

    A brake job rabbit hole

    So it isn't really compatible but it has many of the same circuit board parts since it is the same manufacturer. I found out the manufacturer of the unit and AI gave me some vehicles that use that supplier. There are companies that fix a variety of these boards and they have pictures at the...
  3. C

    A brake job rabbit hole

    Took me a month because I couldn't figure out the issue, was waiting on parts, and had to fix that board.
  4. C

    AC troubleshooting Help/Solved

    Ok, finally solved this. I knew something was wrong where the ECM wouldn't ground the clutch relay pin 87. I knew all conditions were met. I started digging through the wiring (pin 87 is a dark green white stripe wire) and found no continuity between the 4 dark green white stripe wires and pin...
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    AC troubleshooting Help/Solved

    No, all requirements below are met and the ECM per a scan tool allows permission to activate the clutch but the clutch will not actually engage because the ECM never grounds the relay. I can just the relay and get cold AC. The following conditions must be met in order for the ECM to turn on the...
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    AC troubleshooting Help/Solved

    So a little update. I got a hold of a scan tool that can read all gm HVAC data. Everything is acceptable and the ECM gives permission to activate the AC. Only problem is that it doesn't actually ground the clutch relay like it should. The ECM sends data back confirming that the AC is on when I...
  7. C

    AC troubleshooting Help/Solved

    Thank you! These schematics will be helpful
  8. C

    AC troubleshooting Help/Solved

    That's what I thought until I saw an old thread saying they didn't have those sensors until something like 2010 or 2012. I did not see a sensor on top of my HVAC box. As far as I am aware, there is the cabin temp sensor about my head, the ambient temp sensor behind the bumper, the two pressure...
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    AC troubleshooting Help/Solved

    Hey everyone. I am trying to work through an issue with the AC on my 2008 Suburban 2500 and need some help gathering info to get me there. Problem: When AC is turned on in vehicle and temperature is turned to lowest setting, compressor will not engage. What I've done: - All fuses and relays...
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    A brake job rabbit hole

    If I didn't find some in the junkyard, I never would have been able to find these coils elsewhere I don't think. There were none in the yard near me but I believe many of the 2006-2012 Rams used this TRW ABS module. VW used it too in the Passat but it only used the 5.5 ohm black coils
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    A brake job rabbit hole

    Looks like I could buy one right now if it was a 1500! https://a.co/d/2bqDcgTs=25912635&qid=1743204945&sprefix=25912635%2Caps%2C137&sr=8-1
  12. C

    A brake job rabbit hole

    Absolutely something that more people should do. It's an overlooked fluid. Pretty much if it isn't just engine oil, people don't seem to replace it. Coolant, ATF, diff fluid, brake fluid, and power steering fluid is usually guaranteed to be factory original fluid in most vehicles.
  13. C

    A brake job rabbit hole

    This is certainly something I never thought of before this. Fluid in the ABS valving past the outlet valve and within the little internal reservoirs just sits in place unless the abs cycles.
  14. C

    A brake job rabbit hole

    See, what I found was that the EBCM was different from them. They look the same but the PN is different because they typically had the built in brake controller that has unique circuits tied in with the EBCM. I may be wrong but thankfully I didn't have to deep dive that to find parts.
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    A brake job rabbit hole

  16. C

    A brake job rabbit hole

    Hey everyone, I got some good help here brainstorming and getting details on these SUVs so I wanted to share a little write up on how I solved an issue where the rear brakes were sticking and dragging, it isn't what you would think! I recently purchased a 2008 Suburban 2500 off of my father in...
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    Help with brakes before I pull my hair out

    My goodness these lines are harder to get back on then they were to get off. I'll make that write up once the lines are on but it ain't gonna be today! Got 2 of the 6 and don't really need a stripped aluminum block on my hands
  18. C

    Help with brakes before I pull my hair out

    It's a faulty ABS valve block which ended up causing issues with the EBCM as well. Once I get it all back together tomorrow I'll make a new thread doing a little write up of how I ended up diagnosing and fixing this issue incase anyone else has this in the future.
  19. C

    Help with brakes before I pull my hair out

    Thank you!
  20. C

    Help with brakes before I pull my hair out

    Jh6
  21. C

    Help with brakes before I pull my hair out

    Hey, does anyone by chance have access to the full factory service manual and could share any diagram they might have for the EBCM pinout? If they have it, a diagram for the board itself but I doubt they have that. This needs to be the 2008 suburban 2500 specifically.
  22. C

    Help with brakes before I pull my hair out

    Thanks, it's not the technique that's the problem. It was the abs block with corroded valves from sitting. Verified the brakes stick only after the RR inlet valve activates with a scan tool. Then deactivated ABS with both fuses and it doesn't drag on a test drive. My theory is the stuck and...
  23. C

    Help with brakes before I pull my hair out

    I have some needle nose vice grips. I might have to try this. Thank you
  24. C

    Help with brakes before I pull my hair out

    I know. I'm even nervous about the line wrenches. I feel like even the best of the best snap on ones can't handle too much torque before rounding
  25. C

    Help with brakes before I pull my hair out

    While we're here. Anyone got a trick for these rusty flare nuts? Idk why GM decided the ABS module should be here this close to the floor. I feel like a flare nut will just skip and strip it.

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