Add-On Equipment Inoperative, Sulfur/Acid Smell During Vehicle Operation – 2020-2021 Chevrolet Silverado & GMC Sierra HD 2500/3500

2021 Chevrolet Silverado

NHTSA ID Number: 10192032 Manufacturer Communication Number: 21NA062   Summary This informational bulletin directs dealers to the correct path needed to correct a vehicle with the condition of Add-On Equipment Inoperative, Sulfur/Acid Smell During Vehicle Operation based on the correct cause.     4 Affected Products Vehicles MAKE MODEL YEAR CHEVROLET SILVERADO 2500 2020-2021 GMC SIERRA 2500 …

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Coolant Smell and/or Slight Leak at Radiator – 2014-2016 Cadillac Chevrolet GMC

2016 Chevrolet Silverado

NHTSA ID Number: 10155058 Manufacturer Communication Number: PI1513F   Summary This preliminary information bulletin provides a procedure for radiator and engine coolant thermostat replacement to eliminate coolant smell and/or a slight leak at the radiator.   20 Affected Products Vehicles MAKE MODEL YEAR CADILLAC ESCALADE 2015-2016 CADILLAC ESCALADE ESV 2015-2016 CHEVROLET SILVERADO 1500 2014 CHEVROLET SILVERADO 2500 …

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