Catalytic converters, oxygen sensors, EGR valves, manifolds and exhaust hardware to General Motors original specification.
Emissions components have to satisfy the engine control module as well as the regulator. A catalytic converter with a lower precious metal loading will light off later and store less oxygen, and the module's catalyst monitor will eventually report efficiency below threshold even though the vehicle drives normally. Oxygen sensors must match the original heater circuit resistance and switching speed. We supply emissions components to the original GM specification so the on-board monitors run and complete as designed.
The manifold collects each pulse, the upstream sensor trims the mixture, the converter burns off what combustion left behind, and the downstream sensor confirms it. Backpressure stays negligible.
Interactive schematic — behaviour illustrated for orientation, not a model-specific engineering drawing.
A converter rarely fails on its own. It is usually killed by an upstream fault, so replacing it without curing that fault repeats the failure.
A converter almost never fails on its own. Replacing one without first correcting the misfire, oil consumption or rich condition that destroyed it guarantees a repeat failure, usually within months.
We supply Exhaust & Emissions components across every General Motors division:
Because the cause was upstream. Unburnt fuel from a misfire or oil passing the valve stem seals will overheat and contaminate the substrate of any converter, original or otherwise.
Rarely. They differ in heater circuit, wire length and often in element type, because their jobs differ — one controls fuelling, the other monitors the catalyst. Fit the part specified for the position.
Send the VIN and a description. We will identify the correct OE part and quote it back to you.
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