Exhaust System

Checking Exhaust System for Leaks, Malfunction Indicator Lamp (MIL) Illuminated – DTC P2C7A and/or P0421 Set – 2020-2023 Cadillac Chevrolet GMC

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Chevrolet GMC Cadillac

NHTSA ID Number: 10222807 Manufacturer Communication Number: 22-NA-168 Summary This bulletin provides diagnostic information when checking the exhaust system for leaks.   Condition Some customers may comment that the MIL is illuminated. Technicians may comment on one or more of the following DTCs set in the Engine Control Module (ECM): P11D5: Nitrogen Oxides Sensor 2 Exceeded Minimum … Read more

Buzz or Rattle Noise from Exhaust System – 2021 Cadillac Chevrolet GMC

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2021 Chevrolet Blazer

NHTSA ID Number: 10204438 Manufacturer Communication Number: PIT5863   Summary This Preliminary information communicates that a vehicle may be encountered with a buzz or rattle type noise emanating from the exhaust. The dealer technician is directed to replace the exhaust system.     4 Affected Products Vehicles MAKE MODEL YEAR CADILLAC XT5 2021 CADILLAC XT6 2021 CHEVROLET … Read more

Diesel Exhaust System Configuration and DPF Soot Accumulation, Malfunction Indicator Lamp (MIL) Illuminated – DTC P2463 Set – 2017-2023 Chevrolet Silverado & GMC Sierra

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2020 Chevrolet Silverado

NHTSA ID Number: 10222654 Manufacturer Communication Number: 17-NA-374 Summary This informational bulletin advises the technician of how the Soot information has changed from grams to percentage.   Information The following is a list of topics below that are included in the bulletin explaining DPF Soot Accumulation: Reading The Soot Level In % Instead Of Grams Service Regeneration … Read more