[MENTION=73]tinfoilhat[/MENTION]
Chevrolet/GMC/Buick/Cadillac/Pontiac/Olds (GM) Prior to the 2000MY most GM products used a rectangular or oval shaped cap on a wide mouthed reservoir. From the early 70s to mid 80s the reservoir was metal, after that time period it was plastic. If the reservoir is less than 3.75" x 6" the 1105 adapter will be needed which comes with kit 0105, if larger than 3.75"x6" the 1115 adapter in kit 0115 will be needed. In the late 90s GM began switching to a round twist to lock cap across all product lines. The cap twists 1/4 turn and has 3 locking tabs on the underside. Cars with this type of adapter will use Power Bleeder p/n 0108 or the Black Label 0118. The corresponding adapter would be the 1108 or the metal version 1118. If you have late model a Pontiac GTO AND G8, please call us as it seems Pontiac was using random reservoirs on the GTO AND G8. The G8 primarily uses the adapter 1117. But the 1118 has been seen- The GTO has seen the 1117, 1118 and a select few that use the 1105 adapter. Note some Saturn cars use a different cap. - please see the section on Saturn below.