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cause significant loss of engine performance Repair or replace, as required. Improper sealing between the intake manifold Replace the intake manifold, gaskets, Improperly installed or damaged manifold Repair or replace the MAP sensor, as Worn or loose rocker arms Replace the valve rocker arms, as required. Worn or bent pushrods Replace the pushrods. Inspect the top of the pistons for valve Stuck valves Repair or replace, as required. Excessively worn or mis-aligned timing chain Replace the timing chain and sprockets, as required. Worn camshaft lobes Replace the camshaft and valve lifters. Excessive oil pressure 1. Perform an oil pressure test. Refer to Oil Pressure Diagnosis and Testing. 2. Repair or replace the oil pump, as required. Faulty cylinder head gaskets and/or cracking 1. Inspect for spark plugs saturated by coolant. Refer to Spark Plug 2. Inspect the cylinder heads, engine
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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