General Motors is investigating reports of unexpected squeaking and creaking noises in the Cadillac Escalade IQ and IQL, raising concerns about unusual suspension sounds in the automaker’s electric luxury SUVs. A preliminary service bulletin identifies the rear upper control arm bushings as a possible source, but GM has not yet established a repair procedure.

GM Investigates Cadillac Escalade IQ Suspension Noise

Preliminary Service Bulletin PIT6558 identifies the rear upper control arm bushings as a possible cause of the noises reported by owners. The investigation covers 2025 and 2026 Cadillac Escalade IQ models and the 2026 Escalade IQL.

The bulletin also includes the 2024 to 2026 Chevrolet Silverado EV and GMC Sierra EV, extending the concern beyond Cadillac’s electric SUVs to GM’s electric pickup trucks.

Noise Reported When Driving Over Bumps or Turning

Owners may hear the noises coming from the rear of their vehicles when driving over bumps or making turns. However, identifying the precise source can be difficult.

GM has advised technicians that the sound may be challenging to locate. To help determine whether the upper control arm bushing is responsible, technicians have been advised to use chassis ears or a PicoScope near the component.

Even if testing indicates that the noise originates from the upper control arm bushing, technicians have been instructed not to replace it at this time. GM Engineering is working on an update that will be released once the corrected component or components are available.

GM Says Affected Vehicles Are Safe to Drive

GM states that the vehicles covered by the investigation are safe to drive despite the reported noises. The issue has not been deemed dangerous enough to trigger an official recall.

GM’s warranty should cover the reported squeaking concerns in due time. The automaker has also advised owners against attempting to repair or modify their vehicle suspensions themselves.

What Cadillac and GM EV Owners Should Do

Owners who notice squeaking or creaking noises can contact their nearest GM service center to determine whether the sound is coming from the rear upper control arm bushing.

For now, GM is continuing its investigation while its engineering team works on an updated component. Technicians have been instructed to avoid replacing the suspected bushing until the revised parts become available.