According to Leftlanenews.com and Edmunds:
New GM pickups fall short of sales expectations
General Motors was hoping its new GMC Sierra and Chevrolet Silverado pickups would speed its turnaround effort in the United States, but so sales haven't matched expectations.
The trucks are taking longer to sell than the outdated models they replaced, according to date collected by Edmunds and published by the Detroit News. To make matters worse, the trucks are leaving showrooms with just $420 less incentives than the old trucks.
An estimate shows GM sold 200,505 of the trucks in the first quarter of 2007. One GM source told the newspaper those numbers fell "well below internal projections."
Discounts on the trucks averaged $2,453, according to Edmunds. They sat an average of 81 days on dealer lots. Comparatively, the old models had $2,874 in incentives and moved in 55 days during the first quarter of 2006.