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Chevy/GMC Trucks \  Brake Boaster going out?

Brake Boaster going out?

Chevy/GMC Trucks Make Specific
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udefyet   +1y
This is what happens.

When I'm sitting in park, I can push on the brakes real hard, and it gives me some resistance, but if I sit there for a second(at a light) it starts to try to die. It never had died yet, but when I take off, I'll push the gas, and the truck will move REAL slow, then I guess something catches up, and it takes off real fast(like turbo lag).Then there is the whole thing where I have to stand on the brake to make it go all the way down. I'm pretty sure the power stering is out, but I'm leaving the option of a vacume leak since when I push on the brakes, it makes a "air" sound, like when you fill your air tank up at low preasure(0-20psi).

Anywho, anybody had this problem? I drive a 1999 S10 automatic std cab. 4.3 v6. Thanks.
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