GMC Sierra 3500 HD sunroof explosion with no apparent cause, GM refusal to assist with repair on GMC Sierra 3500 HD

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some GMC Sierra 3500 HD owners report experiencing sudden sunroof explosions with no apparent cause, where the glass shatters unexpectedly. These incidents have raised concerns about potential manufacturing defects or installation issues, as General Motors (GM) has faced similar reports regarding sunroofs in their vehicles. When GM refuses to assist with repairs, owners may need to seek professional options to address the malfunctioning sunroof effectively. It is also crucial for owners to document the incident details and any communication with GM to support their case for resolution. Understanding the risks and safety concerns associated with a malfunctioning sunroof is essential for taking prompt action to resolve the issue.

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