Our Terms of Service and Privacy Policy have changed.

By continuing to use this site, you are agreeing to the new Privacy Policy and Terms of Service.

2 of 7
BACKNEXT
GMC Sierra/Chevrolet Silverado
Front impact: Good
Side Impact: Poor
Whiplash protection: Acceptable
Stability Control: Optional
Top Safety Pick: No

While they earned the top grade of "Good" for front-crash protection, General Motors big trucks got a "Poor" rating from the Insurance Institute for side-impact protection.

The problem, according to the Institute, is a weak side structure combined with the absence of body-protecting side airbags. These trucks do have head-protecting side airbags and those worked well, but those airbags don't protect ribs and internal organs.

The Silverado and Sierra earned top ratings for both front and side impact protection from the federal government's National Highway Safety Administration, which uses different tests from those used by the Insurance Institute.

"IIHS tests are valid and we do pay attention to them," GM said in a statement responding to the Insurance Institute, "but it's also important to understand the results of a single test do not determine whether a vehicle is safe or not."

GM will be making changes to these trucks for the 2010 model year that will allow them to perform better on the Insurance Institute's tests, a GM spokeswoman said separately.

NEXT: Nissan Titan

Last updated February 11 2009: 12:23 PM ET
More Galleries
Driving the world's first car Driving a replica of the 1886 Benz Patent Motorwagen, the first internal combustion automobile. More
The 7 biggest investment mistakes celebrities make From betting too heavily on real estate to overestimating future earnings, here are 7 of the most common money mistakes that celebrities make. More
Cotton candy, toothpicks, pet gel -- these products are all made from marijuana Legal cannabis, an estimated $5.4 billion industry, is drawing in entrepreneurs with a variety of innovative products -- from skin patches to pain relief gel for pets. More

Special Offer