Pickups and SUVs are among the most profitable vehicles that Detroit sells. They are built on truck platforms and carry relatively high margins.

The problem with pickup sales recently is that high gas prices hurt sales of cars and trucks that use a lot of gas. Sales of most light trucks fell over 15% last year, and the Big Three have not found a solution.

General Motors (NYSE: GM) thinks it may have found a way around the fuel issue -- hybrid pickups. It will offer a new Sierra, one of its larger light trucks, powered by the new technology. "GM says the 2009 GMC Sierra hybrid gets a 25 percent improvement in fuel economy without compromising performance," according to the Associated Press.

If the new truck sells well, GM may be able to step ahead of its rivals with a solution to get consumers back into the SUV market. For its profitability that would be a big deal.

Douglas A. McIntyre is an editor at 247wallst.com.

As early as this weekend, Labor Day weekend, the Bush administration could open the U.S. roadways to Mexican trucks. The Teamsters Union and three public-interest groups: The Sierra Club, Public Citizen and Environmental Law Foundation, asked a federal court yesterday for an emergency injunction to prohibit Mexican trucks on the roads.

The union has fought for 13 years to stop Mexican trucks from entering into the U.S., a promise given by Bill Clinton under the North American Free Trade Agreement, or NAFTA. They argue that the introduction of these trucks would compromise highway safety and cost U.S. jobs.

Hector Marquez, head of the Mexican Economic Ministry's Trade and NAFTA Office, disagrees. "It's very unfortunate because certainly the governments of Mexico and the United States have put forth a tremendous effort to put in place all the requirements, all the mechanisms, all the personnel and the resources to make this work and to guarantee the security and safety," the Houston Chronicle reported today. The Transportation Department's Federal Motor Carrier Safety Administration dismissed the suit as "without merit."

Rolando Ortega, a delegate from the National Confederation of Mexican Carriers, doesn't believe Mexican truckers want to travel into the United States.

MOST NOTEWORTHY: QLogic (QLGC), Cnet Networks (CNET), Taiwan Semiconductor (TSM), Darden Restaurants (DRI) and Anadys Pharma (ANDS) were today's noteworthy downgrades:

• QLogic (NASDAQ: QLGC) was cut by several firms:
  
• QLogic was cut to Neutral from Outperform and removed from JP Morgan's Focus List due to the lack of catalysts to drive shares higher.
  
• Caris cut shares to Average from Above Average and Pacific
  
• Crest downgraded QLogic to Sector Perform from Outperform as the company's profits decline.

• Citigtroup downgraded CNet Networks (NASDAQ: CNET) to Hold from Buy as they no longer expect material revenue growth acceleration and operating leverage in 2H07; First Albany cut shares to Neutral from Buy.

• HSBC downgraded shares of Taiwan Semiconductor (NYSE: TSM) to Neutral from Overweight to reflect worse than expected pricing pressures.

• Matrix downgraded shares of Darden Restaurants (NYSE: DRI) to Hold from Buy on increasing competition and rising costs.

• Piper cut Anadys Pharma (NASDAQ: ANDS) to Underperform from Outperform following the company's announcement that it has discontinued development of ANA975...

OTHER DOWNGRADES:

• First Albany cut Zimmer Holdings (NYSE: ZMH) to Buy from Strong Buy.

• Bear Stearns downgraded AutoNation (NYSE: AN) to Peer Perform from Outperform.

• Piper Jaffray downgraded Volcom (NASDAQ: VLCM) and Sierra Wireless (NASDAQ: SWIR) to Market Perform from Outperform.

• Bernstein downgraded Coca-Cola Enterprises (NYSE: CCE) to Underperform from Market Perform.

Analyst summaries provided by TheFlyOnTheWall.com (subscription required).