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.

• 10172662Feb 14, 2020Equipment, Engine cooling. Service Update - Certain vehicles may have a condition where the thermal cover may accelerate corrosion of the low pressure diesel hydrocarbon injector. Dealers are to remove the low pressure diesel hydrocarbon injector thermal cover.
• 10173423Feb 13, 2020Electrical system. This engineering information (EI) is requesting information from the field to perform the check list provided and contact the engineer in regards to Instrument Panel Cluster (IPC) Gages at Zero, Multiple Warning Lights On, No Chimes and/or Turn Single Audio.
• 10172317Feb 13, 2020Fuel system. This Preliminary information provides information to the technician on relocating the DEF tank to install a service body. Technician will need to reference the latest version of General Motors Up-fitter Integration Bulletin 156. The information can be found at http://www.gmupfitter.com/ under the "Technical Bulletin" Tab and then "Show all bulletins."
• 10172784Feb 7, 2020Equipment, Engine. This Bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
• 10172883Jan 31, 2020Electrical system, Visibility (wipers, defrost, mirrors). This SKU is a Power Window Regulator and Motor Assembly. The customer communication requested return of unsold inventory to inspect the software. The software may be too sensitive to the position of a locating magnet in the assembly causing the activation of the pinch point threshold prematurely. The window will stay open when it should have closed.
• 10172294Jan 29, 2020Equipment. This informational bulletin provides information on GM Accessories ? Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
• 10172290Jan 29, 2020Wheels, Back-over prevention (rear camera). This technical bulletin provides a procedure to re-torque the leaf spring u bolts to correct a condition of Clunking Noise from Rear of Vehicle (Re-torque Leaf Spring Bolts).
• 10172289Jan 29, 2020Steering. This technical bulletin provides repair information to correct a customer concern of Intermittent "Service Steering Column Lock" message displayed with U0155 Set.
• 10172288Jan 28, 2020Brakes. This technical bulletin provides a procedure to replace the front and rear brake pads if the brakes are squealing.
• 10171896Jan 28, 2020Engine. This diagnostic tip provides a procedure to aid in performing a diagnostic test to verify if the camshaft alignment pin has been sheared away to correct a crank/No Start condition.
• 10172293Jan 27, 2020Equipment, Wheels. This informational bulletin provides retail, wholesale and fleet personnel with General Motors recommendations for customer concerns related to wheel alignment.
• 10171875Jan 23, 2020Engine cooling. This informational bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in other states.
• 10172285Jan 21, 2020Equipment. This Warranty Administration bulletin provides information on customer vehicles concern results in a manufacturer repurchase from the customer, GM depends on the dealership to host and administer the repurchase closing and intake of the returning vehicle.
• 10171905Jan 14, 2020Equipment, Steering. This informational bulletin explains there is another steering hose that can be used for cold weather drivers that experience a steering hose leak.
• 10172292Jan 13, 2020Electrical system, Equipment. This bulletin provides information regarding Part Restriction and Ordering Process Information for OnStar® Vehicle Communication Interface Modules (VCIM) (GMNA Only).
• 10171898Jan 8, 2020Transmission and drivetrain, Equipment. This technical bulletin provides the tech with a procedure to check the t-case for loose fasteners and to re-torque if the cause of the concern.
• 10171889Jan 8, 2020Body and structure, Visibility (wipers, defrost, mirrors). This technical bulletin provides repair information to correct a customer concern of water found in rear interior of cab due to water leak at rear sliding window.
• 10171878Jan 2, 2020Fuel system, Equipment. This informational bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
• 10171247Dec 5, 2019Body and structure, Engine cooling. N192259800 - Customer Satisfaction Program - Certain 2020 vehicles vehicles, equipped with the 6.6L diesel engine (RPO L5P), may have a condition in which the adhesive attaching the heat shield to the air inlet panel may lose adhesion. Dealers are to replace the air inlet grille panel assembly.
• 10169357Nov 26, 2019Equipment. This informational bulletin provides information on key code security rules and information on GM keycode look-up applications.
• 10169355Nov 25, 2019Equipment. This informational bulletin provides information for dealers/technicians on Use of Dealer Case Management (DCM) and Being Prepared for Contacting U.S. Technical Assistance (TAC).
• 10169351Nov 21, 2019Equipment. This technical bulletin provides repair information to correct a customer concern of Phone Ringer Volume Turned Down or Too Quiet.
• 10169636Nov 1, 2019Steering, Electrical system. N192279900 - Service Update. On certain vehicles equipped with an active hydraulic assist gear (RPO NV8), the driver may experience a steering wheel vibration while driving typically at speeds from 50 mph (80 km) to 80 mph (130 km). Dealers are to reprogram the power steering control module.
• 10168210Oct 30, 2019Equipment. This informational bulletin provides technicians and dealership personnel with spray-in bed liner general information and repair procedures.
• 10168212Oct 29, 2019Transmission and drivetrain. This informational bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operations.
• 10168200Oct 21, 2019Steering. This technical bulletin provides repair information to correct a customer concern of steering wheel oscillation, vibration, shake 50-80 mph.
• 10168237Oct 16, 2019Equipment. This informational bulletin informs the technician of a possible low A/C charge in a low milage vehicle from the factory.
• 10168207Oct 16, 2019Equipment. This informational bulletin provides information for dealers how to submit a product information report (PIR) (Canada Only).
• 10168238Oct 14, 2019Equipment. This informational bulletin provides tips for showing a way to confirm if its a mechanical engine issue or not.
• 10168209Oct 14, 2019Engine cooling. This informational bulletin provides information on Clean Exhaust Filter See Owners Manual Now or Cleaning Exhaust Filter Keep Driving Until Message is Cleared messages Displayed on DIC, DTC P2463 May Be Set.
• 10168193Oct 14, 2019Engine cooling. This technical bulletin provides a procedure to flush the cooler lines to validate if there is excessive debris in the fuel system caused by a failed part.
• 10168186Oct 10, 2019Equipment. This informational bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking.
• 10168208Oct 9, 2019Equipment. This informational bulletin provides information on key code security and information on GM key code look up applications.
• 10168205Oct 9, 2019Engine cooling. This informational bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
• 10167478Oct 8, 2019Engine cooling, Electrical system. N192266751 - Service Update (9 VINs moved from N192266750 due to different procedure). On certain vehicles that are equipped with a 6.6L diesel engine, may have one or more of the following conditions exist: 1.The instrument panel cluster may incorrectly display the message ?DEF Low? when a diesel engine fluid (DEF) controller internal fault is detected (DTC P20FF), instead of displaying the proper ?Service DEF…
• 10168235Oct 7, 2019Electrical system. This technical provides a procedure to locate, disconnect and re-connect the TCM electrical connector if found the cause of the customers concerns.
• 10168204Oct 2, 2019Equipment. This informational bulletin provides information on comebacks prevention information and using customer concern verification sheets (CCVS).
• 10168188Oct 2, 2019Equipment. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA) (US dealers only).
• 10168177Oct 1, 2019Engine cooling. This bulletin provides information on common diesel engine tick noises and how they are considered part of normal operation and no parts should be replaced for these normal operating conditions.
• 10164750Aug 7, 2019Equipment. This Preliminary information communication provides information to the technician on installing Regular Production Option Code 9L7 Up-fitter Auxiliary Switches. Technician will need to reference the latest version of General Motors Up-fitter Integration Bulletin 153. The information can be found at http://www.gmupfitter.com/ under the "Technical Bulletin" Tab and then "Show all bulletins."
• 10163900Jul 26, 2019Equipment. This informational bulletin provides process information for the (GWM) and (WPC) parts return program.
• 10163886Jul 8, 2019Other or unknown. This informational bulletin provides explanation of a normal condition of a loose fitting ball receiver in the gooseneck.
• 10164110Jun 28, 2019Equipment, Transmission and drivetrain. N192265570 - Service Update. Certain vehicles may have misalignment between the transmission output shaft and the transfer case input. Transfer case to transmission misalignment could cause the transfer case shift collar to slip out of engagement. Customers may experience noise, vibration, or harshness issues such as a clunk noise heard during coast down event. Dealers will perform a road test inspection and…
• 10163222Jun 27, 2019Engine. This informational bulletin advises the technician of how the Soot information has changed from grams to percentage.
• 10163272Jun 26, 2019Equipment. The intent of this technical bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.
• 10163270Jun 26, 2019Steering. This technical bulletin provides a procedure to flush and bleed power steering system to correct a power steering noise or fluid leak concern that is caused during extremely low temperatures.
• 10163268Jun 26, 2019Equipment, Electrical system. This bulletin provides information for electrical ground repairs using new General Motors replacement fasteners with conductive finish.
• 10163261Jun 26, 2019Fuel system. This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.
• 10162158Jun 26, 2019Engine cooling. This Preliminary Information communication advises the technician that the 6.6L Engine (RPO L8T) has been placed on Engine Exchange program. Dealer will need to contact General Motors Product Quality Center for further assistance.
• 10163260Jun 25, 2019Equipment. This informational bulletin advises about the possible issues that may occur when using a scotch brite pad or highly abrasive disk on gasket sealing surfaces or reused parts.

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