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Service bulletin PIP5621A

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10168978
Published by NHTSA2019-12-09
Manufacturer's numberPIP5621A
Manufacturer's date2019-11-22
NHTSA componentPOWER TRAIN

NHTSA's 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.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Vehicles listed
BUICK CASCADA2016, 2017, 2018
BUICK ENCLAVE2015, 2016, 2017, 2018
BUICK ENCORE2015, 2016, 2017, 2018
BUICK ENVISION2016, 2017, 2018
BUICK LACROSSE2015, 2016, 2017, 2018
BUICK REGAL2015, 2016, 2017, 2018
BUICK VERANO2015, 2016, 2017
CADILLAC ATS2015, 2016, 2017, 2018
CADILLAC CT62016, 2017, 2018
CADILLAC CTS2015, 2016, 2017, 2018
CADILLAC ELR2015, 2016, 2017
CADILLAC ESCALADE2015, 2016, 2017, 2018
CADILLAC ESCALADE ESV2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
CADILLAC ESCALADE ESV2017, 2018
CADILLAC SRX2015, 2016
CADILLAC XT52017, 2018
CADILLAC XTS2015, 2016, 2017, 2018
CHEVROLET 35002016
CHEVROLET AVEO2015, 2016, 2017, 2018
CHEVROLET BOLT EV2017, 2018
CHEVROLET CAMARO2015, 2016, 2017, 2018
CHEVROLET CAPRICE2015 to 2017
CHEVROLET CAPTIVA2015 to 2018
CHEVROLET CHEVEROLET SS2015 to 2017
CHEVROLET CHEYENNE2017
CHEVROLET CITY EXPRESS2015, 2016
CHEVROLET COLORADO2015, 2016, 2017, 2018
CHEVROLET CORVETTE2015, 2016, 2017, 2018
CHEVROLET CRUZE2015, 2016, 2017, 2018
CHEVROLET EQUINOX2015, 2016, 2017, 2018
CHEVROLET EXPRESS2015, 2016, 2017, 2018
CHEVROLET IMPALA2015, 2016, 2017, 2018
CHEVROLET LOW CAB FORWARD 45002017 to 2018
CHEVROLET LOW CAB FORWARD 55002017 to 2018
CHEVROLET MALIBU2015, 2016, 2017, 2018
CHEVROLET N3002015 to 2016
CHEVROLET N3002018
CHEVROLET N300 MAX2017
CHEVROLET ORLANDO2017
CHEVROLET S102016 to 2018
CHEVROLET SILVERADO2017
CHEVROLET SILVERADO 15002018 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002015, 2016 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002018 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002017 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SONIC2015, 2016, 2017, 2018
CHEVROLET SPARK2015, 2016, 2017, 2018
CHEVROLET SPARK EV2015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN2015, 2016, 2017, 2018
CHEVROLET TAHOE2015, 2016, 2017, 2018
CHEVROLET TRAILBLAZER2017 to 2018
CHEVROLET TRAVERSE2015, 2016, 2017, 2018
CHEVROLET TRAX2015, 2016, 2017, 2018
CHEVROLET VOLT2015, 2016, 2017, 2018
GMC ACADIA2015, 2016, 2017, 2018
GMC CANYON2015, 2016, 2017, 2018
GMC SAVANA2015, 2016, 2017, 2018
GMC SIERRA2017
GMC SIERRA 25002015, 2016 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002018 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2018 (the catalog's model; the bulletin names a series or trim of it)
GMC TERRAIN2015, 2016, 2017, 2018
GMC YUKON2015, 2016, 2017, 2018
GMC YUKON XL2015, 2016, 2017, 2018

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
26V2890002026-05-07. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
20205202020-10-29. Powertrain
20V6680002020-10-29. POWER TRAIN:AUTOMATIC TRANSMISSION
20200202020-01-23. Powertrain
20V0380002020-01-23. POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT
17V5160002017-08-22. POWER TRAIN:DRIVELINE:DRIVESHAFT
16V5020002016-07-05. ELECTRICAL SYSTEM:IGNITION; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
20163412016-06-30. Powertrain
14V8190002014-12-24. POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT
20145892014-12-22. Powertrain

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
PI0281L2025-06-12. Service bulletin. This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
PIP5966A2025-03-02. Service bulletin. This Preliminary information communicates Diagnostic aids for a no start or DTC'S following a transmission replacement
PIP5966A2025-03-02. Service bulletin. This Preliminary information communicates Diagnostic aids for a no start or DTC'S following a transmission replacement
16-NA-0192025-02-19. Service bulletin. This service bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
PIP5175F2025-02-10. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that may have a delayed engagement into drive, shudder at a launch, or the transmission is slipping when shifting into 1st, 2nd, 3rd or 4th gears. This may be due to loose stator support to pump cover bolts causing a leak at the stator support to pump cover gasket. Technician will check for the bolts to be loose. If any of the bolts are loose or the gasket is misaligned or leaking, the transmission pump cover must be replaced and the 1234 clutch plates should be inspected for being distressed and repaired as needed.
09-06-04-026Z2025-01-23. Service bulletin. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
PIC6454A2025-01-20. Service bulletin. This Preliminary Information communicates additional information to the customer on the "No Lift Shift" feature found on all Manual Transmission equipped Camaros.
08-07-30-035I2024-12-19. Service bulletin. This service bulletin provides information on the harmful effects of ethylene glycol in transmission fluid.
21-NA-1812024-12-18. Service bulletin. This service bulletin provides 9th gear operation information to respond to customers that may comment on transmission shift operation.
PIP60142024-12-05. Service bulletin. This Preliminary information communicates for Technicians installing a Service Replacement Transmission Assembly to contact Technical Assistance to make sure unit is not suspect of a snap ring concern prior to installation.