H3 Hummer 3.7L 5cyl Vortec Engine Map Sensor GM Silverado 09-20 # 12644228 Cylinder Head Accessory Bolt Holes Machined On
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H3 Hummer 3.7L 5cyl Vortec Engine Map Sensor GM Silverado 09 20 # 12644228 Cylinder Head Accessory Bolt Holes Machined On Accessory Bolt Holes Machined On Ends Of Heads These bolts have a compact head that will allow a socket to fit into those tight