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EBCM unit is missing? Please Help! I'm completely new with GM Trucks.

Alex9
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Alex9 New Member

Alex9

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Hello, I just bought my first used pk truck 2007 silverado 1500 classic (As-is). Love it! It was cheap and running fine when I test drove it (again I had no idea about trucks and or GMs). Naturally the truck comes with problems.... So when I looked under my truck and found 2 plugs that were horribly corroded and just hanging off the driver side structural frame. Please see the 2 pictures I attached. Took me 3-4 weeks to figure out that there is supposed to be a EBCM/ABS control unit there. But seems like whoever worked on this truck before took it completely out??? Then they did some kind of welding and re-routing the fittings/brake lines (2nd pic). My questions are, is this safe at all? and is this why I can't shift my truck into gear when it is on? (I hit the brake to shift and the shift would not budge - I did change out the brake switch and that didn't help but then found out the shift selonoid gets constant power even when the brake is depressed - so it wouldn't release my shift into gear). Whoever worked on this truck went above and beyond by opening up the instrument cluster and taped up the check engine light too when it got sold to me... very very unethical people. I can't do anything about that anymore, so now these are my problems and I have to slowly figure out how to fix all of these. There are many other issues.... Thank you for taking your time out to help, please advise on how should I go about reversing this mess?

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txab Senior Enthusiast

txab

Posted
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Bet you're going to spend a lot of money on this truck or end of scrapping it. That picture is probably the tip of the iceberg of issues. Good luck

davester Senior Enthusiast

davester

Posted
Posted (edited)

Yeah, the only reason I can see for anyone doing that would be if they took the part off to use on another truck or to sell, as even if the abs part of it fails, it doesn't fail so the brakes don't work, just the abs stuff does.  And given that the lines are welded/soldered together (which will be weird as 2 lines have to connect to 3 lines), to do it right you should replace all the lines, and at least get an abs unit from a junkyard truck from a very similar truck.

 

That said, I don't think that the abs computer not being hooked up is the reason why your truck isn't shifting out of park.  There might be a physical interlock in the steering column...

 

But that kind of work, I would expect similar quality work elsewhere.  I hope you got that truck REALLY cheap.

Edited by davester
Alex9 New Member

Alex9

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Thank you for the responses. I know what to do now. I really don't have anymore budget for professional fees at the moment. So, I'm just going slow at this. What would be the overall steps to do this? Bleed fluid, remove lines, add ABS unit, reattach lines, add fluid and get air out of system? Is there any reprogramming? I never saw the ABS light shows up on my instrument cluster (they actually taped up the engine light internally and took out some lamps along the way to hide all of the safety issues). I have no airbags connection (just found out the actual airbag control unit under the driver seat is not even there), no abs, no seatbelt light, no TPMS light (does 2007 silverado come with one? I don't even know). Right now I know for sure the vehicle computer doesn't know that there's no airbag, no abs, and any other hazard warning components. I ran a scan and got no codes whatsoever regarding safety except for o2 sensor one.

Edited by Alex9
davester Senior Enthusiast

davester

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Posted

you can't just reattach the existing lines to an abs controller, because the ends are all messed up from welding/soldering, and you can't realistically get the ends back to the nice clean flared setup to get a good seal.

 

and you probably need a better code reader to be able to get airbag and abs error codes.

Alex9 New Member

Alex9

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Thank you for the advice. I just bought a brake lines kit online for $100 and an abs unit from a yunk yard for $50.  Seems reasonable price for parts to fix. The hard part is changing out all the lines and bleed the system I guess. Will see how that goes.

C/K Man Enthusiast

C/K Man

Posted
Posted

Best of luck to you, it really isn't that hard to make the ABS work right.  As for the previous owner, it never ceases to amaze me how much time and effort someone will put into fixing something the wrong way.  

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