2007 GMC Sierra 2005 Chevrolet Z71

In recent years, GM has begun to try to create some distinction between the sister brands, with Chevrolet s trucks catering, not surprisingly, to mainstream truck buyers while GMC s products are designated professional grade with distinct qualities specifically answering the needs of buyers that use their trucks as modern day field oxen....Just as important to truck buyers is the frame, which is now fully boxed with hydroformed front sections and additional cross-members. StabiliTrak is now standard on crew cab models and available on extended cab models...At the top of the regular (ie: non-Denali) Sierra range is a 6.0-liter V-8 with 367-hp and 375-lb-ft, which, like the 5.3-liter, features Active Fuel Management to save gas....After being relatively impressed with the transformation of GM s full-size SUVs, we had high expectations of the pickups with which they share so much. They didn t disappoint. Though we tested only V-8 models, we found all to be smooth and quiet on the highway.... : caranddriver.com, Nov. 06