Toyota Motor Corp. is winning the battle for full-size pickup buyers in Texas, the biggest market for the trucks that are Detroit automakers’ best-selling models, Bloomberg News reported.

Promoting the redesigned 2007 Tundra, Toyota forced General Motors Corp., Ford Motor Co. and Chrysler LLC to match incentive spending estimated at about $6,000 per truck, Bloomberg said. While Tundra’s Texas market share soared 79%, competitors’ shrank by 5%, said market-research firm R.L. Polk & Co.

The Texas competition will make it harder for Ford and Chrysler to benefit from the revamped F-Series and Dodge Ram pickups being unveiled at the Detroit auto show Jan. 13, Bloomberg said.

Nationally, 2007 sales soared 58% as Toyota redesigned the Tundra to vault it into the full-size category. Meanwhile, GM’s Chevrolet Silverado, Ford’s F-Series, Chrysler’s Ram and Nissan Motor Co.’s Titan fell, leading a 3.2% slide for the segment, Bloomberg said.