2020 GMC Sierra 3500 Technical Service Bulletins

906 technical service bulletins (TSBs) are on record for the 2020 GMC Sierra 3500. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10163227Jun 24, 2019Engine. This informational bulletin provides information on 6.6L Duramax Possible Oil Leak Path Information.
• 10163225Jun 24, 2019Engine cooling. This informational bulletin provides information for the technicians on where to look on the Duramax engine for coolant leaks.
• 10163214Jun 17, 2019Wheels. This informational bulletin provides information to clarify installation requirements when installing Accessory wheels on 2020 Chevrolet Silverado HD and 2020 GMC Sierra HD.
• 10163263Jun 11, 2019Electrical system, Equipment. This bulletin explains the labor operation numbers used for submitting warranty claims for module reprogramming and not when replacing a module.
• 10162119Jun 11, 2019Transmission and drivetrain. This Preliminary information communicates to the dealer technician that the 10L1000 transmission have been place on a part restriction. Dealers are to contact the Product Quality Center before replacing the transmission assembly.
• 10163236Jun 10, 2019Equipment. This New Model Features Bulletin provides General Information and other Topics to help the Service Personnel become familiar with features specific to the new Chevrolet Silverado and GMC Sierra 2500HD-3500HD pickup trucks.

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