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Drivetrain - 2001 - 2010 Discuss front and rear axle, transfer case, brakes, etc. Transmission questions belong in the appropriate transmission forum below. First through fourth generation...

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Old 12-31-2019, 09:13 PM   #11 (permalink)
jblather
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Quote:
Originally Posted by srodster View Post
I should also add, that on occasion when I push the brake pedal, sometimes I get a "fading" pedal as it gets to the bottom. Would that go beyond a "3 seal" change?
Looks like my hydroboost was leaking where yours is - the "weep" hole.

I just got an entire new unit instead of rebuilding it. A replacement unit was a lot quicker to install and came with a warranty. $216 from O'Reilly. Core was $33. Took me two hours.

Afterwards, it felt like it had a brand new truck - braking feel was excellent.

A few months later, I flushed out the power steering and hydroboost unit. It's real easy.

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2003 2500HD LS CC/LB 4x4 Duramax/Allison Completely Stock
273K miles on the original stock injectors.
Front Bumper Replacement
Transfer Case rub Repair and new rear case half.
Billet torque converter
Replaced instrument cluster stepper motors.
Canadian truck in the USA.

Last edited by jblather; 12-31-2019 at 09:15 PM.
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Old 01-02-2020, 10:42 PM   #12 (permalink)
OKMillerTime
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We just put a GM hydraboost in my Father in laws 2011 2500hd about a month ago. I think it was just a little more our cost than an oriellys or autozone (we have a bodyshop). It was we quicker than getting one from any aftermarket. I think I have a good used one from an earlier model. We tried it in his truck, but the shaft to the petal was a different length.

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Old 02-25-2020, 11:44 AM   #13 (permalink)
BillB3857
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If you replace the Hydroboost unit, make sure you keep the push rod from the old unit. Replacement units come (at least mine did) without that much needed part!
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Old 02-25-2020, 03:04 PM   #14 (permalink)
jblather
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Quote:
Originally Posted by BillB3857 View Post
If you replace the Hydroboost unit, make sure you keep the push rod from the old unit. Replacement units come (at least mine did) without that much needed part!
FYI, my rebuilt unit came *with* the pushrod.
__________________
2003 2500HD LS CC/LB 4x4 Duramax/Allison Completely Stock
273K miles on the original stock injectors.
Front Bumper Replacement
Transfer Case rub Repair and new rear case half.
Billet torque converter
Replaced instrument cluster stepper motors.
Canadian truck in the USA.
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Old 02-27-2020, 01:27 AM   #15 (permalink)
C8H18C18H34
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On mine I have just done the single (main) seal. Never had another problem.
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