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05-20-2013, 07:51 PM
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Registered User
Join Date: Nov 2012
Location: Salt Lake City, UT
Posts: 520
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brakes spongy after swap
Anybody else having problems? I put the 5.3 vortec in my 85 gmc 4x4. I have a vacuum coming off the manifold into the brake booster, transmission, and heater controls.. My brakes are very spongy, I thought I read somewhere that these motors don't put out enough vacuum. input?
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