Catalytic Converter for Cadillac XT6 (2020-2023) 3.6L Front Left & Right

Direct-Fit Front Left & Right Catalytic Converter Set for 2020-2023 Cadillac XT6 (C1XX)

What it Does: The Front Left & Right Catalytic Converter assembly replaces deteriorated factory catalytic units on the 2020-2023 Cadillac XT6 to restore factory exhaust scavenging and eliminate catalyst inefficiency codes.

The Stock Cadillac XT6 Catalyst Substrate Breakdown

Under repeated thermal cycling and prolonged engine run times, the factory close-coupled catalytic converters on the C1XX platform suffer washcoat degradation and substrate sintering. The LGX 3.6L V6 features integrated exhaust manifolds with direct cylinder head porting that subjects the OEM ceramic core to sustained thermal extremes up to 1,600°F. Over time, internal cell blockages restrict cross-bank exhaust pulses, elevating backpressure, triggering P0420/P0430 DTCs, and degrading high-RPM volumetric efficiency.

The Engineering Solution

This direct-replacement converter pair engineered for the LGX engine platform utilizes a heavy-gauge 409 stainless steel tubular casing precision-bent to match factory packaging clearances. Inside, high-flow ceramic honeycomb substrates feature an optimized noble metal catalyst loading (Pt/Pd/Rh) to ensure thorough oxidation of unburned hydrocarbons and reduction of NOx. Laser-cut mounting flanges and integrated O2 sensor bungs eliminate the need for cutting or welding, providing bolt-on alignment to stock downpipe hangers and secondary exhaust pipe interfaces. Note: 46-state legal; not legal for sale or use in California, New York, Colorado, or Maine.

Technical Specifications

Compatibility

• 2020 Cadillac XT6 Premium Luxury, Sport (3.6L V6 LGX)
• 2021 Cadillac XT6 Premium Luxury, Sport (3.6L V6 LGX)
• 2022 Cadillac XT6 Premium Luxury, Sport (3.6L V6 LGX)
• 2023 Cadillac XT6 Premium Luxury, Sport (3.6L V6 LGX)
• Fits Front Left (Driver) and Front Right (Passenger) positions only
• Excludes 2.0L Turbo (LSY) and 2.5L configurations

Frequently Asked Questions

Does this fit the C1XX XT6?

Yes, this is a direct fit for the 2020-2023 Cadillac XT6 equipped with the LGX 3.6L V6 engine.

Will installing these converters clear persistent P0420 and P0430 diagnostic trouble codes?

Yes, replacing depleted OEM substrates with fresh high-efficiency washcoat cores restores downstream O2 sensor switching ratios to factory thresholds.

The Cadillac Precision Standard

Engineered to preserve the low cabin NVH and precise emissions management expected of Cadillac luxury platforms, these direct-fit catalytic converters deliver OE-level fitment and reliable, trouble-free operation.