New York (AFP) – General Motors confirmed its full-year financial forecast Tuesday, lifting shares as it reported strong consumer demand in spite of a “challenging” environment with grinding inflation. The big US automaker scored a 37 percent jump in third-quarter profits to $3.3 billion, bolstered by strong vehicle pricing in a market with historically low auto inventories. Revenues jumped 56 percent to $41.9 billion, a quarterly record. GM Chief Financial Officer Paul Jacobson acknowledged rising worries about the drag from inflation on economic growth, but said the company was still seeing…