2005 Grand Prix GT with P0507 code
#21
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Solved the problem! It was a bad brake booster.....it just about got me...but I finally found the problem....but in a new brake booster and we are good to go!!
#22
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True Car Nut
Thanks for letting us know what fixed it!
#23
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I found the problem (Finally)...... it was a vacuum leak in the brake booster..... when I found the problem, and replaced the booster...... the problem was solved!
#24
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True Car Nut
Thanks for letting us know what fixed it!
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