Chevrolet Trailblazer cracked exhaust manifold causing loud noise and potential warranty coverage on Chevrolet Trailblazer

Submitted by vieja · Jun 23, 2025
Published by RepairPal

Problem overview

Some Chevrolet Trailblazer owners report experiencing issues with cracked exhaust manifolds, which can lead to loud engine noises. This problem has been noted in various models, including the 2008 Trailblazer, with some drivers encountering manifold cracking at relatively low mileage. The cost of repairing a cracked exhaust manifold can be significant, with estimates ranging from $600 to over $1,000. In response to this issue, General Motors (GM) has provided special warranty coverage for certain cases of cracked exhaust manifolds on the Trailblazer, and in some instances, they have fully covered the replacement under extended warranties. However, warranty coverage may vary based on specific circumstances and vehicle mileage. Owners facing this issue are encouraged to contact GM to inquire about potential warranty coverage, as GM has recognized this problem as a safety concern due to the increased exhaust noise associated with a cracked manifold. Prompt attention to this issue is essential for ensuring the vehicle's proper functioning and the owner's safety on the road.

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