DETROIT (AP) - General Motors says it will invest $1.3 billion at five factories in three states so they can build higher-quality trucks and more fuel-efficient engines and transmissions. About $600 million will go to the Flint, Mich., assembly plant for a new paint shop. The plant makes full-size pickup trucks. An engine plant in Romulus, Mich., near Detroit will get $493 million to build a new V-6 engine and 10-speed automatic transmissions. Around $121 million will go for a logistics center at a Detroit factory, while GM will spend $31 million in Toledo, Ohio, to build more six-speed transmissions. A casting plant in Bedford, Ind., will get $29.2 million to make transmission parts. It's unclear how many jobs will be added. GM would say only it will create or keep 1,000 positions.