2018 GMC Sierra Denali Technical Service Bulletins

948 technical service bulletins (TSBs) are on record for the 2018 GMC Sierra Denali. 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.

• 10163216Jun 27, 2019Engine, Equipment. This informational bulletin provides information on higher than expected oil consumption.
• 10163268Jun 26, 2019Equipment, Electrical system. This bulletin provides information for electrical ground repairs using new General Motors replacement fasteners with conductive finish.
• 10163266Jun 25, 2019Equipment, Engine. This informational bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
• 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.
• 10163238Jun 25, 2019Engine. This technical bulletin provides a procedure to replace the head gaskets if found doubled stacked.
• 10163193Jun 25, 2019Equipment. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
• 10163227Jun 24, 2019Engine. This informational bulletin provides information on 6.6L Duramax Possible Oil Leak Path Information.
• 10163226Jun 24, 2019Fuel system. This Bulletin provides information to correct a customer concern of a siren or whine noise from the in-tank fuel pump at temperatures below -6C or 20F, accompanied by start and stall, no start, loss of power and MIL illuminated. Technicians may find DTCs P0087, P018B, P228A, P228B or P2635 set in ECM.
• 10163225Jun 24, 2019Engine cooling. This informational bulletin provides information for the technicians on where to look on the Duramax engine for coolant leaks.
• 10163208Jun 24, 2019Fuel system. 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.
• 10162143Jun 19, 2019Engine cooling. This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on. Technician will find Diagnostic Trouble Codes P0340 and P0341 setting at times. Technician should use normal published Service Information diagnostics. If normal Service Information diagnostics does not isolate the concern, inspect for corrosion in connector…
• 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.
• 10163245Jun 10, 2019Equipment. This informational bulletin provides information for dealers/technicians and customers on possible carpet color mismatch.
• 10163237Jun 10, 2019Engine cooling. This informational bulletin provides information for dealers/technicians and customers on steam/vapor coming from the front grille or radiator area.
• 10163215Jun 6, 2019Transmission and drivetrain. This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns.
• 10162106Jun 3, 2019Electrical system. This Preliminary Information communication provides information to the technician about the use of J-35616-64B terminal test probe, replacement terminals, and terminated leads. The J-35616-64B is the latest test probe released for checking tension or probing the .64 series terminals. The test probe terminal has been released in the terminal repair kit (J-38125-620H) located in Lear Tray 7 part number 963716-2.
• 10161969May 31, 2019Equipment, Body and structure. This informational bulletin provides technicians and dealership personnel with spray-in bed liner general information and repair procedures.
• 10161926May 30, 2019Brakes. This technical bulletin provides repair information to correct a customer concern of pulsing, grinding, scraping noise from brakes, uneven front brake pad wear.
• 10161903May 30, 2019Brakes. This technical bulletin provides repair information to correct a customer concern of pulsing, grinding, scraping noise from brakes, uneven front brake pad wear.
• 10161047May 28, 2019Engine, Other or unknown, Electrical system. This Preliminary Information communication provides information to the technician for a Service Engine Soon light with a Diagnostic Trouble code P0300 set. There may be a rough running engine associated with this concern. If service information diagnostics have been completed and there is still no trouble found, the technician is to inspect for a possible terminal tension concern on the ignition coil power feed for…
• 10161046May 28, 2019Equipment. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
• 10161932May 21, 2019Engine cooling. This informational bulletin advises of a new fuel injection kit used for decarbonizing the intake valves, and explains how toptier fuels should be used to reduce carbon build up.
• 10161881May 21, 2019Transmission and drivetrain. This technical bulletin provides information for new transmission oil to use and a procedure for exchanging the old fluid and adding the new fluid to correct a shake/shudder during light throttle acceleration condition.
• 10161968May 20, 2019Transmission and drivetrain. This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.
• 10161955May 16, 2019Engine. This technical bulletin provides a procedure to replace the head gaskets if found doubled stacked.
• 10161906May 9, 2019Tires. This informational bulletin provides information for dealers/technicians on Tire Radial Force Variation (RFV).
• 10161929May 8, 2019Equipment. This warranty administration bulletin provide policy information to cover GM's policy on performing GM covered vehicle services and maintenance on vehicles originating/sold in Canada.
• 10161931May 7, 2019Engine cooling. This informational bulletin provides a procedure on how to perform a quick test to check if the DPF is the cause of excessive soot from the tailpipe.
• 10160987May 7, 2019Engine. This Preliminary Information communication provides information to the technician to not remove the torque converter bolts and start the engine as this may cause damage to the torque converter of the crankshaft on vehicles equipped with an automatic transmission.
• 10161939May 6, 2019Vehicle speed control, Electrical system. This technical bulletin provides a procedure to locate and repair a possible short in the 5294 circuit and correct the customers concern.
• 10160983May 6, 2019Equipment, Engine. This Preliminary Information communication provides information to the technician about finding needle bearings during an oil change. Technician will gain access to the roller rockers to inspect them. Only replace the roller rocker that is missing needle bearings. Be sure to clean the oil drains to retrieve the needle bearings. Each roller rocker has 66 bearings.
• 10161970May 2, 2019Visibility (wipers, defrost, mirrors). This preliminary informational bulletin contains recommendations of what needs to be done to swap/install camper outside rearview mirrors on a vehicle not originally equipped with them.
• 10161907May 2, 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).
• 10160134Apr 30, 2019Engine. This informational bulletin explains the normal noises an engine may make when the ambient temperature outside is cold or the vehicle has sat for a few hours.
• 10160682Apr 23, 2019Visibility (wipers, defrost, mirrors). This Preliminary Information communication advises the technician the steps on diagnosing the concern. Customer's sunroof operation intermittent, bind, noise, auto-reverse, and/or water leaks.
• 10160087Apr 18, 2019Equipment, Engine. This technical bulletin provides a procedure to measure vibration and install engine mounts to correct a Rough Idle in Drive concern.
• 10160666Apr 15, 2019Electrical system. This Preliminary Information communication provides information to the technician that First Responder Guides for General Motors vehicles can be accessed via the web at http://www.gmstc.com. or http://www.nfpa.org/
• 10160133Apr 2, 2019Equipment, Transmission and drivetrain. This informational bulletin provides normal operating characteristics and diagnostic information on Manual transmissions.
• 10160135Apr 1, 2019Equipment. This informational bulletin provides information on proper use of floor mats.
• 10160132Apr 1, 2019Electrical system. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements.
• 10159564Mar 28, 2019Transmission and drivetrain. N182188930-01 - Special Coverage (Added Customer Reimbursement Labor Codes). Some vehicles, equipped with a Duramax Diesel engine, the transmission cooler lines may be rubbing on the front frame/bumper mount bracket. This condition could cause the cooler lines to leak. Transmission fluid may be seen on the ground under the front bumper. Some drivers may have difficulty selecting gears or experience transmission slip.
• 10158815Mar 28, 2019Body and structure, Electrical system. This technical bulletin provides a procedure to locate possible chassis wiring damage from areas along the frame and repair them if found.
• 10158864Mar 26, 2019Equipment. This warranty administration bulletin provides information on Dealer Empowerment Labor Operations and Customer Enthusiasm.
• 10158859Mar 25, 2019Equipment. This informational bulletin provides information on interior cleaning products and what is offered to clean the interiors of GM vehicles.
• 10158855Mar 25, 2019Equipment. This informational bulletin provides the dealership with how to prep a vehicle for delivery to the customer to aid in higher CSi scores.
• 10158867Mar 22, 2019Equipment. This informational bulletin provides information on proper use of floor mats.
• 10158857Mar 22, 2019Equipment. This informational bulletin provides information for the dealer technician to gather as much information to help aid Engineers by completely filling out requested reports.
• 10156947Mar 22, 2019Suspension. This Preliminary Information communication provides information to the technician about vehicles that have a lean to the left or right. Technician will need to measure fender wheel-opening heights, front and rear, to quantify vehicle lean. Fender wheel-opening heights are related to, but distinct from, trim height. The front wheel-opening height is known as P height, and the rear wheel-opening height is known as R…
• 10158781Mar 20, 2019Engine, Equipment. This informational bulletin provides diagnostic/inspection information for the air box and air filter seal to correct a MIL and DTCs P0420 and P0430 setting.
• 10156939Mar 19, 2019Equipment. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.

← All problems reported for the 2018 GMC Sierra Denali