general problems of the 2003 GMC Sierra

Failed component 1: driving at slow speed, reduced power light energized and engines goes to idle speed with no fuel pedal response. Failed component #2: exhaust manifold bolts in cylinder heads broken on both sides of engine, passenger exhaust manifold cracked, exhaust is loud with exhaust fumes in cab. Depending on what is causing the fuel system failure and whether the cylinder heads have to be removed to remove the broken bolts, these repairs could cost thousands.