Is there a relay or sensor for the exhaust manifold
Wondering what your issue is please?
When I give it gas its like it isn't blowing out the exhaust but when in park it idles fine
Sounds like a restricted exhaust system. First check for crushed or damaged exhaust pipes or muffler. Are you also experiencing loss of power or the engine running hot? Those are other symptoms of a restricted exhaust system. Is the check engine light on? What year is your Silverado? If nothing is visibly damaged you may have a clogged catalytic converter or the baffles inside of the muffler may be falling apart and clogging up the exhaust system. HTH. -Jim
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