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Service bulletin 21NA075

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 id10192040
Published by NHTSA2021-05-10
Manufacturer's number21NA075
Manufacturer's date2021-03-29
NHTSA componentVEHICLE SPEED CONTROL

NHTSA's summary

This technical bulletin provides repair information to correct a customer concern of a Front Door Upper Speaker Faint Hiss or Whistle Noise.

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

Throttle and cruise control

Vehicles listed
CADILLAC XT52021
CADILLAC XT62021

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

Other bulletins for the same vehicles and component
10-08-110-001L2025-02-11. Service bulletin. This service bulletin provides information on proper use of floor mats.
23-NA-0722023-06-05. Service bulletin. This service bulletin provides a procedure to correct a customer concern of Shudders or Shakes at Low Speeds.
PIT58452021-09-13. Service bulletin. This Preliminary information communicates information to diagnose adaptive cruse with DTC U0422 in the EBCM.
PIT5606J2021-02-16. Service bulletin. This Preliminary information communicates an Intermittent No Crank, No Start, or Reduced Power loss of data multiple U codes or Intermittent Power Door Locks inoperative, unwanted seat or mirror movement. Inspect harness for chaffed by the I-shaft at the base of the steering column. If chaffed, repair damaged wires and zip tie the harness away from the I-shaft. Also Inspect the HVAC drain hose is properly routed and not plugged.
PIT5606J2021-01-25. Service bulletin. This Preliminary information communicates an Intermittent No Crank, No Start, or Reduced Power loss of data multiple U codes or Intermittent Power Door Locks inoperative, unwanted seat or mirror movement. Inspect harness for chaffed by the I-shaft at the base of the steering column. If chaffed, repair damaged wires and zip tie the harness away from the I-shaft. Also Inspect the HVAC drain hose is properly routed and not plugged.