| Rank | Board name and description | Posts | Members |
| 1 | LS2 General Motors discussion board | 12054866 | 24457 |
| 2 | LS1 Tech Chevrolet and GM enthousiasts discussion | 11163162 | 159208 |
| 3 | Full Size Chevy GM SUVs and trucks forums | 4047720 | 114669 |
| 4 | GM Full Size General Motors trucks community | 3478401 | 23285 |
| 5 | Colorado K5 Chevrolet and GM trucks message boards | 2584844 | 53523 |
| 6 | GM Inside News Chevrolet, Pontica, Cadillac and other GM brands forums | 1833781 | 47392 |
| 7 | Trailvoy Chevrolet Trailblazer forum | 835929 | 53982 |
| 8 | J-Body GM enthusiasts forums | 835400 | 17292 |
| 9 | The Diesel Garage Diesel engines discussion forums | 691635 | 21124 |