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Old December 22nd, 2010, 03:08 PM   #1
chris1044
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Default GMT800 ABS module (pump won't shut off)

2001 Silverado, 2wd. ABS module is toast...again. Pump won't stop running - no codes, no light, but the pump runs unless the fuse is pulled. The moron who decided it was a good idea to put this directly under the driver seat on the frame and the manager that approved this should shot...


Anyhow, I know the module itself is bad - assume a relay contact is stuck or some circuit on the board is corroded. This is the second time this has happened on the truck - first replacement module went on it about 5 years ago (and was covered under warranty).

Aside from taking it in the ass at the dealer (700 bucks) or laying in the mud at the junkyard (who still wants 150-200 for the module), where should I look to get a quality rebuilt unit??
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Old December 22nd, 2010, 06:37 PM   #2
Ironman Offroad
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Do you really want to trust your brakes to a rebuilt unit?
Just saying my families health is worth more.
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Old December 22nd, 2010, 07:03 PM   #3
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U can replace just the module thats on top of the abs motor and lines. There are 4 torx screws that hold it on. Any reputable yard should pull it for u so u arent laying in the mud. Yes they will sell u a complete unit but once u have it you can disassemble the top half so u dont leak fluid everywhere.
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Old December 22nd, 2010, 09:52 PM   #4
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Quote:
Originally Posted by Ironman Offroad View Post
Do you really want to trust your brakes to a rebuilt unit?
The truck is my fathers, and he drives it roughly 16 miles a day down 45-55mph roads to work. If the rebuilt unit fails, you'll either a) not have abs, or b) have an abs pump that runs all the time (which means if an ABS stop is needed, so long as the solenoids allow fluid to the different channels as needed you'll still have an ABS stop).

When the EBCM on these fails, the pump defaults on...it really shouldn't be that big of a deal to de-solder a relay/a few transistors from a board and re-solder new ones onto it...it's just a matter of having the time/proper schematics to go through the whole circuit board and diagnose the failure.

Either way, spending 700 bucks for something to fail again after 5 years or so is ridiculous.

Quote:
Originally Posted by GREASYHANDS View Post
U can replace just the module thats on top of the abs motor and lines. There are 4 torx screws that hold it on. Any reputable yard should pull it for u so u arent laying in the mud. Yes they will sell u a complete unit but once u have it you can disassemble the top half so u dont leak fluid everywhere.
I know this. I only want to replace the module. Any reputable yard will sell me one, but they want 200-250 for one that "should work." Hence why I'm looking for another option...if it comes down to it, I'll either go with a junk yard unit or tear into it myself...
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