# 1994 gmc 2500 abs

**URL:** <https://community.cartalk.com/t/1994-gmc-2500-abs/172969>\
**Category:** Maintenance/Repairs\
**Tags:** gmc, 2500\
**Created:** [December 4, 2020, 12:54am UTC](https://community.cartalk.com/t/1994-gmc-2500-abs/172969 "2020-12-04T00:54:46Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![RichardHardy](https://avatars.discourse-cdn.com/v4/letter/r/3e96dc/32.png) [@RichardHardy](https://community.cartalk.com/u/RichardHardy)\
**Post date:** [December 4, 2020, 12:54am UTC](https://community.cartalk.com/t/1994-gmc-2500-abs/172969/1 "2020-12-04T00:54:46Z")

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abs won’t work right

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [December 4, 2020, 11:03am UTC](https://community.cartalk.com/t/1994-gmc-2500-abs/172969/2 "2020-12-04T11:03:22Z")

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If I were a service writer that would be an adequate statement, but a little more information would be welcome.  
With or without more information the diagnostic fee will still be $100-$150, some shops may waive the fee if they perform the work.

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [December 5, 2020, 7:57pm UTC](https://community.cartalk.com/t/1994-gmc-2500-abs/172969/3 "2020-12-05T19:57:00Z")

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The didn’t work right when new. I’d unplug it.

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**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\
**Post date:** [December 5, 2020, 8:42pm UTC](https://community.cartalk.com/t/1994-gmc-2500-abs/172969/4 "2020-12-05T20:42:07Z")

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rear wheel abs, I presume?

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<div class="post-metadata">

**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [December 5, 2020, 9:10pm UTC](https://community.cartalk.com/t/1994-gmc-2500-abs/172969/5 "2020-12-05T21:10:28Z")

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> [@db4690](#):
>
> rear wheel abs

That was my guess, I don’t think 4 wheel ABS was available on 2500’s that year. RockAuto only shows a rear-only ABS hydraulic unit.

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<div class="post-metadata">

**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\
**Post date:** [December 5, 2020, 9:14pm UTC](https://community.cartalk.com/t/1994-gmc-2500-abs/172969/6 "2020-12-05T21:14:10Z")

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wasn’t RABS known as being “temperamental” . . . ?!

was it one of those technologies that was developed just so that a vehicle could be “in compliance” . . . sort of like those awful motorized seat belts?

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<div class="post-metadata">

**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [December 7, 2020, 6:01pm UTC](https://community.cartalk.com/t/1994-gmc-2500-abs/172969/7 "2020-12-07T18:01:07Z")

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Cheaper ABS… made some sense on trucks that run empty and fully loaded requiring a large difference in brake force for those 2 conditions. It helped e brake performance and stopping distance in theory.

Never seemed to work very well in practice much like the first Kelsey Hayes 4 wheel ABS on GM trucks.