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1977 gmc siarra grande
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https://www.truckforums.com/forum/general-motors-tech-37/1977-gmc-siarra-grande-18691/
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duckboyinc@yahoo.com
04-30-2012 10:36 AM
1977 gmc siarra grande HELP ...rookie
i lose power and fuel when going up hills. truck runns good on flat land .pleace help
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