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Home >> GMC >> 2005 >> Jimmy Part Time, Standard >> Repair and Diagnosis >> Engine Mechanical >> Engine Mechanical - 4.3L >> Description and Operation >> Engine Component Description >> Engine Block
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Engine Block

The cast iron engine block has six cylinders arranged in a V shape with three cylinders in each bank. Starting at the front side of the engine block, the cylinders in the left bank are numbered 1-3-5 and cylinders in the right bank are numbered 2-4-6 when viewed from the rear. The firing order of the cylinders is 1-6-5-4-3-2. The cylinders are encircled by coolant jackets.