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ABS & BRAKE LIGHTS (humming hydo unit)

scrapykunas

By scrapykunas
in Ask A GM Technician

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scrapykunas Enthusiast

scrapykunas

Posted
Posted

I just purchased a 99 GMC sierra Z71 last week. I was pressure washing the mud off the underside when I noticed a plug hanging down. My ABS and powerbrake lights where already on, so I know there is some sort of problems. I disconnected the battery and then plugged the plug back in to the large black housing under the driverside with hydrolic brake lines coming out of it. When I reconnected the battery, there was very loud noises (much like a muffled loud radio) coming from that large unit under the driverside. So I quickly disconnected the battery and left the plug under the truck unplugged.

My question: I pretty sure that unit is bad, but before I replace it, is there any chance some sort of electronic module connected to that unit is bad and making the unit malfunction?

How much should I expect to pay for that part and/or parts?

and how complicated is it to replace?

Thanks for any help you can offer.

Robert

100R1 Enthusiast

100R1

Posted
Posted
You need a new ABS module.  About $800 from a dealer or you can go here...

 

http://www.modulemaster.com/

 

 

 

 

 

Has anyone tried this company on the website?

 

 

 

 

 

YES!

 

I just had my Module rebuilt a month ago for my '01 Yukon $ 150.00 (plus freight) very quick turn around.

 

Now comes with a 5 year Warranty

 

ModuleMaster is everything they state on their website.

scrapykunas Enthusiast

scrapykunas

Posted
  • Author
Posted

I'm gonna give a shot. :D

I never was much of a gambler, even with all the casinos we USED to have.

 

But possibly saving $600 seems worth it.

 

I'll post afterwards and let yall know.

 

Thanks 100R1 for the help

 

 

RC

  • 9 months later...
co_truck New Member

co_truck

Posted
Posted

Sounds like I have the same problem as the original "poster" mine started while I was using the ABS in icy conditions, just unplugged the power to the module went on my way. My question is will Module Master program the unit for your appropriate tire size? Thanks a lot!!!

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