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They haven’t been on the market that long, but some customers have noted a problem with the hill start assist feature on the 2011 Heavy Duty Chevy Silverado and GMC Sierra. The hill-start assist, which is integrated with the trailer brake control function is designed to apply the brakes for an additional 1.5 seconds after the pedal is released, if the truck is parked on an incline of five percent or greater. However, there have been instances where it hasn’t engaged, instead the truck rolls as soon as brake pedal is released.
Not beating around the bush, GM quickly discovered that the problem lay with improper software calibration on the hill-start start system and is now issuing a recall. All brand new trucks will have the fix performed before they leave for the dealerships, while GM is actively looking at ways to get trucks already owned by customers back to have the software glitch corrected.
[Source: Pickup trucks.com]