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October 25, 2019 Service bulletin

Engine and engine cooling

Chevrolet technical service bulletin PIT5447C for 2015-2020 Chevrolet Tahoe, 2015-2020 Chevrolet Suburban and 2015-2020 GMC Yukon and others.

Bulletin number
PIT5447C
Component
Engine and engine cooling
Summary
This Preliminary Information communication provides information to the technician on the steps needed to diagnose and repair vehicles that may have a rattle noise from the dash. Technician will need to inspect for the rear heater pipes contacting the passenger side exhaust manifold. If the rear heater pipe is found to be contacting the exhaust manifold, reposition the heater pipe so it no longer makes contact.

Owners of these vehicles have filed 615 complaints in the engine category.

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