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GMT900 Hydroboost Conversion How-to

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Old 04-08-2013, 05:31 PM   #11
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My trailer brake controller is functioning, doesn't bother me as I never used it and have the hitch off. I tried to remove the dash message "Service Brakes Soon" which seems to appear when switch is on ignition, trick didn't work.
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Old 05-12-2013, 08:53 PM   #12
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Thought pl4hboy fixed the brake message prob? Read somewhere all you do is tie both outside wires on the vacuum sensor connector together and message should go away. Any more info on this or can anyone post up a diagram to show what each wire does?
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Old 05-21-2013, 01:04 PM   #13
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Thought pl4hboy fixed the brake message prob? Read somewhere all you do is tie both outside wires on the vacuum sensor connector together and message should go away. Any more info on this or can anyone post up a diagram to show what each wire does?
That works perfectly on NBS. Tried it on mine, wasn't lucky.
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Old 05-24-2013, 04:59 PM   #14
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what about reflashing the bcm with a truck with the same options as yours but has hydroboost?
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Old 05-30-2013, 04:33 AM   #15
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Hmm, thats an idea... But isn't reflashing the BCM is simply by disconnecting the battery terminal? Or you mean using HPTuners?
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Old 08-13-2013, 09:40 AM   #16
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Any updates on the service brake light?
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Old 08-13-2013, 04:32 PM   #17
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Any updates on the service brake light?
x2 I'd love to do this to my tahoe before buying my wilwoods!
But if I have a dash light on my head will explode!
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Old 08-24-2013, 05:03 PM   #18
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Would imagine a bcm reflash would work... Let me talk to my buddy at the dealer and see if its possible. I don't have the parts to do the swap yet but would imagine the flash can still be done and connector just be disconnected. Will see what happens.
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Old 08-25-2013, 05:28 PM   #19
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Would imagine a bcm reflash would work... Let me talk to my buddy at the dealer and see if its possible. I don't have the parts to do the swap yet but would imagine the flash can still be done and connector just be disconnected. Will see what happens.
Alright awesome thanks cant wait to hear back from you!
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Old 10-27-2013, 10:27 AM   #20
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Where does this actually go and what did it replace?


As for the master cylinder having different size flare fittings....couldnt you just reuse your factory master cylinder, replace whatever gasket/ o ring and buy the power brake booster for the hydroboost swap?

As for the feed hose and cooler hose setup did you cut and extend the hoses using hydro line or did you go a different route?

Any luck with the message?
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