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November 3, 2015 Service bulletin

This Preliminary Information communication provides information to the technician about vehicles that may...

GMC technical service bulletin PIT5476 for 2015 GMC Sierra 2500 and 2015 GMC Sierra Denali.

Bulletin number
PIT5476
Component
Suspension
Summary
This Preliminary Information communication provides information to the technician about vehicles that may have rough harsh ride. Technician will need to use the Pico Oscilloscope to evaluate the vehicle. If a rough/harsh/stiff ride has been determined to be the customer?s concern, following evaluation using the Pico Oscilloscope, then replace the complete front suspension shock with coil spring assemblies, and rear shocks with updated parts and reprogram the Suspension Control Module with updated calibrations available in TIS2WEB.

Owners of these vehicles have filed 2 complaints in the suspension category.

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