Diagnostic Tips

Passenger Side HVAC Blows Warm After Performing Bulletin 17-NA-293 – 2016-2017 Buick Envision

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2017 Buick Envision

NHTSA ID Number: 10178393 Manufacturer Communication Number: PIT5760   Summary This preliminary information discusses the possibility of connectors being swapped during service and causing incorrect air delivery from the right side HVAC vents.   2 Affected Products Vehicle MAKE MODEL YEAR BUICK ENVISION 2016-2017     SEOCONTENT-START Bulletin No.: PIT5760 Published date: 07/29/2020 Preliminary Information PIT5760 Passenger … Read more

Possible Crank No Start or Extended Crank With DTC P12A6 Set As Current or History – 2020-2021 Cadillac Chevrolet GMC

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2021 Chevrolet Suburban

NHTSA ID Number: 10193472 Manufacturer Communication Number: PIP5733R   Summary This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history.  Under Investigation     4 Affected Products Vehicles MAKE MODEL YEAR CADILLAC ESCALADE 2020 CHEVROLET SUBURBAN 2020 CHEVROLET TAHOE 2020 GMC YUKON 2020   Condition Possible Crank no start or extended … Read more

Malfunction Indicator Lamp (MIL) Illuminated – DTC P026A Set – 2020-2022 Cadillac Chevrolet GMC

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2021 Chevrolet Silverado 1500

NHTSA ID Number: 10205590 Manufacturer Communication Number: 21NA271   Summary This bulletin advises the technician of a possible coolant hose that might be kinked causing the customers concern.     18 Affected Products Vehicles MAKE MODEL YEAR CADILLAC ESCALADE 2021-2022 CADILLAC ESCALADE ESV 2021-2022 CHEVROLET SILVERADO 1500 2020-2022 CHEVROLET SUBURBAN 2021-2022 CHEVROLET TAHOE 2021-2022 GMC SIERRA 1500 … Read more

Information on Diesel Exhaust Fluid Pump is Unable to Build Pressure After Replacement – 2017-2022 Cadillac Chevrolet GMC

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2020 Chevrolet Silverado

NHTSA ID Number: 10205057 Manufacturer Communication Number: 20NA110   Summary This service bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump.     61 Affected Products Vehicles MAKE MODEL YEAR CADILLAC ESCALADE 2021 CADILLAC ESCALADE ESV 2021 CHEVROLET 4500HD 2021 CHEVROLET 5500HD … Read more

MIL Illuminates While Descending a Grade with the Transfer Case in 4wd Low – DTC P0776 Set – 2018-2020 Cadillac Chevrolet GMC

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2020 Chevrolet Suburban

NHTSA ID Number: 10178271 Manufacturer Communication Number: 20NA112   Summary This technical bulletin advises the technician to validate the code and reset if found the cause of the customers concern.   18 Affected Products Vehicles MAKE MODEL YEAR CADILLAC ESCALADE 2018-2020 CADILLAC ESCALADE ESV 2018-2020 CHEVROLET SUBURBAN 2018-2020 CHEVROLET TAHOE 2018-2020 GMC YUKON 2018-2020 GMC YUKON XL … Read more