Table 1 shows one common engine and engine cooling related problems of the 1998 Chevrolet Silverado 1500.
| Problem Category | Number of Problems |
|---|---|
| Manifold/header/muffler/tail Pipe problems |
Exhaust manifold bolts breaking leaving studs in the heads, heating up engine compartments, releases carbon monoxide, affects O2 sensor and catalytic converter. Will not pass emissions in some states. Gm not standing behind this 1999-2008 issue. It is a safety issue and is expensive to fix. Gm mechanics denying any such issues. Please check- in to this. Our whole fleet and our personal trucks affected by this.