The 1500 series went on sale late in 2006, and the heavy-duty class follow in early 2007.
While a concerted effort by General Motors to make sufficient changes the Sierra than ever from the Chevrolet Silverado, its sister model, they succeed.
Once again the Sierra shares a platform with the Yukon and Yukon XL full-size SUVs. The models came first on this all-new platform, making their 2007-model debut earlier in 06?. The chooses are great : regular, extended and Crew Cab body styles; short, standard and long cargo box lengths; multiple powertrain combinations; 5 suspension packages; and 4 trim levels. Also there's also rear- or four-wheel drive.