Chevrolet Silverado owners have reported 42 problems related to manifold/header/muffler/tail pipe (under the engine and engine cooling category). The most recently reported issues are listed below.
The vehicle was leaking water in the front and rear intake manifold gasket.
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all problems of the 1996 Chevrolet Silverado
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My major complaint is that of a leaking intake manifold. (5. 7l v8). I've noticed many complaints of this problem and it needs to be a recall!.
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all problems of the 1997 Chevrolet Silverado
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Replaced muffler and pipe assembly due to exhaust system noise.
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all problems of the 1999 Chevrolet Silverado
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Every morning when starting vehicle up engine makes noise, and big cloud of smoke comes through the tail pipe.
Constant loud ticking noise from left side of engine/underbody. Only audible while truck is in gear and under accelleration. Suspect faulty catalytic converter or manifold to exhaust seals. If leaking, could pose health threat. Dealership and Chevrolet advised. So far, response is that is the way it was designed. Noise is simply engine harmonics passing through tailpipe. I disagree.
On top of engine electrical wires are connected, and fuel is bypassing into control module. When vehicle is under pressure, it causes fuel to leak into engine compartment, which could come into contact with the manifold, causing a fire hazard. Consumer has contacted dealer.
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all problems of the 1998 Chevrolet Silverado
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Intake manifold leaked coolant onto the engine. This can result in the engine overheating and result in a fire. The fitting in the intake manifold used to connect the coolant hose was made of a different metal than the intake manifold itself. This caused dissimilar metal corrosion in the fitting itself which lead to unnoticed pin hole leaks in the cooling system. Consumer felt gm should have provided a barrier between the two metals to solve the problem.