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First natural gas GM half-ton pickups with 5.3L DI engines delivered in Texas

Green Car Congress

The 2015 model vehicles were purchased by local Houston company NewTex Plumbing and San Antonio-based Pioneer Energy Services. During EPA testing the DuraDrive DI set a record for efficiency on an eight-cylinder natural gas truck, achieving 23 mpg (10.2 liter direct injection engine. l/100 km) highway. In addition to supporting the 5.3-liter

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Details on GM’s new efficient top-end 8-speed automatic

Green Car Congress

2015 Hydra-Matic 8L90 (M5U) Eight Speed RWD Automatic Transaxle Click to enlarge. GM is offering a version of its new GM-developed Hydra-Matic 8L90 paddle-shift eight-speed automatic transmission in the 2015 Corvette Stingray ( earlier post ) and Z06. In the 2015 Corvette Stingray, the new 8-speed enables a class-leading 29-mpg (8.1

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