1999 GMC P3500 equipped with 7.4L V8 Gas OHV, 6.5L V8 Diesel OHV Turbo, 6.5L V8 Diesel OHV, 5.7L V8 Gas OHV, 4.3L V6 Gas OHV
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GM Original Equipment REMOVE RED VENT PLUG BETWEEN PIPE FTGS PRIOR TO INSTALLATION
1999 GMC P3500 equipped with 7.4L V8 Gas OHV, 6.5L V8 Diesel OHV Turbo, 6.5L V8 Diesel OHV, 5.7L V8 Gas OHV, 4.3L V6 Gas OHV
GM Original Equipment REMOVE RED VENT PLUG BETWEEN PIPE FTGS PRIOR TO INSTALLATION