Question about 1994 GMC Sonoma

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Brakes went out

I have to step on my brake super hard almost to the floor in order for my truck to come to a stop what do i do

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You most likely have a leaking power brake booster unit, here is how you test it, run the engine for a few moments, then after turning it off press on the brake pedal a few times, if it sink and then gets hard to push the booster is working, if no change the booster is defective.

Posted on Oct 06, 2008

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Posted on Jan 02, 2017

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2 Answers

Power brakes stopped working


Brake booster vacuum hose , inspect that, if the hose is good then brake booster has went bad.e1320de5-8a99-48ed-84e9-c42d2e2274cb.jpg

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Did they no what they were doing,? Replace the master cylinder for the brakes, End check the lines going to the Brake perporshener that they are not leaking,

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It went to the floor because you had to compressed the piston to get it over the new pads and rotors. The brakes need to be pumped up after you replace pads in order for the pistons to come back in contact with the new pads and take up the gap. Pushing the pedal to the floor is never a good idea and a good way to ruin a master cylinder in older vehicles.

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1 Answer

Brake light on, power brakes seem gone


Chk. for vacume to booster, or loss of vacume like a break in vacume hose, do you hear a hissing noise when you step on break peddel. If you don't hear anything chanses are its the booster. When peddel gets hard to push you either lost vacume or booster went bad.

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