Gm 5.3 Flex Fuel Engine Problems Lawsuit cause carcomplaints consumption defects Gm 5.3-liter engine problems cause class action lawsuit GM 5.3-Liter Engine Problems Cause Class Action Lawsuit | CarComplaints.com GM 5.3-Liter Engine Problems Cause Class Action Lawsuit | CarComplaints.com Check Details ← 2007 Chevy 5.3 Flex Fuel Engine Gmc Sierra 5.3 Engine For Sale → Share with friends Link copied