6L80 6L90 8L90 10L80 10L90 10L000 Equipped Vehicles With A Harsh Shift Shudder Surge Stall Or High Transmission Fluid Temperature – 2021-2023 Cadillac Chevrolet GMC

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Chevrolet GMC Cadillac

NHTSA ID Number: 10222668 Manufacturer Communication Number: 22-NA-182 Summary This informational bulletin advises the tech to check if the trans cooler lines are twisted which may cause the customers concern.   Condition Some customers may comment on one or more of the following before or after the transmission has been overhauled: Harsh shifting Shudder Surging Stalling Transmission … Read more

GM TAC Support On Vehicle Automatic Transmission Concerns That Can Be Duplicated

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General Motors

NHTSA ID Number: 10224285 Manufacturer Communication Number: PIP5621C Summary This Preliminary information communicates to the dealer  technician that TAC recommends the utilization of the GDS2 software to aid in diagnosing automatic transmission concerns. TAC is requesting the GDS2 session logs be sent in before the dealer contacts TAC.   Condition Some customers may comment on the operation … Read more

Service Engine Soon (SES) Lamp Illuminated, DTC P1467 and/or P1469 Set – 2019-2020 Chevrolet Silverado 1500

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2020 Chevrolet Silverado 1500

NHTSA ID Number: 10224286 Manufacturer Communication Number: PIT5723A Summary This Preliminary information communicates information that the EVAP purge pump may be filling with liquid fuel if the customer overfills the fuel tank by over 3 clicks of a normal filler nozzle. Reference N202324990: Special Coverage – Evaporative Emissions Purge Pump for repair information   Condition Some customers … Read more

Blue Hourglass and No Gridlines While In Reverse – 2021-2023 Cadillac

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Cadillac

NHTSA ID Number: 10224287 Manufacturer Communication Number: PIC6472 Summary This Preliminary information communicates to dealer that Engineering is actively working on a solution to the blue hourglass and no grid lines while in reverse  concern.   Condition Some customers may comment that when attempting to reverse, the rear-view camera on the radio display will have a blue … Read more

No Start, No Propulsion, Service Park Brake System Message or Dead 12 Volt Battery After A Over The Air Update (OTA) – 2022 GMC HUMMER EV

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2022 GMC Hummer EV

NHTSA ID Number: 10224288 Manufacturer Communication Number: PIT5944 Summary This Preliminary information communicates to the field how to address a condition that was caused by a over the air update.   Condition Some customers may experience one or more of the following concerns after a customer recently accepted an OTA update: 1. No Crank 2. No Propulsion 3. … Read more