GM offers more truck incentives, hybrids included queryvar=”gm,offers,more,truck,incentives,hybrids,included”; Craig Trudell Automotive News | June 9, 2008 – 3:45 pm EST ENLARGE The GMC Yukon now has $6,000 on the hood.   DETROIT — General Motors has doubled several cash incentives on its biggest new trucks and SUVs, which will reach as high as $6,000 [...]