2018 GMC Sierra 1500 Technical Service Bulletins

956 technical service bulletins (TSBs) are on record for the 2018 GMC Sierra 1500. 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.

• 10155007Jan 10, 2019Electrical system. This technical bulletin provides a procedure to locate and repair a possible short in the 5294 circuit and correct the customers concern.
• 10155036Jan 7, 2019Equipment. This technical bulletin provides repair information to correct a customer concern of hearing a pickup box ornamentation bar (Sports Bar) wind noise or rattle.
• 10154258Jan 7, 2019Steering. N182190820 - Customer Satisfaction Program. Certain vehicles, may have a condition where the power steering belt may slip due to tooth wear-out or poor belt tooth-to-gear tooth fit. Power steering assist may be reduced or lost intermittently, if early warning signs are ignored. Early warnings may include a ?Steering Assist is Reduced? message, audible clicking / squealing sounds, or a change in steering effort…
• 10154617Dec 28, 2018Steering. This Preliminary information communicates a repair procedure for a squeak/squawk type noise coming from the lower column/drivers footwell area when turning. It explains how to properly lubricate the column shaft boot where the shaft interacts with the boot where it passes through the boot.
• 10155010Dec 21, 2018Equipment. This warranty bulletin provides labor operation numbers for customer concerns Not duplicated (CCND).
• 10155003Dec 17, 2018Seats. This technical bulletin provides repair information to correct a customer concern of front seat lateral movement and/or click type noise while driving.
• 10154606Dec 17, 2018Equipment. This Preliminary Information communication provides information to the technician about the Media Oriented Systems Transport Bus Diagnostic Tool Kit (EL-51578) has been released to help diagnose any of the Media Oriented Systems Transport bus concerns. The kit contains header connectors that are installed to bypass Media Oriented Systems Transport bus modules. The bypass connector also contains a terminal for…
• 10154605Dec 17, 2018Suspension. This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer?s vehicles that exhibit vibration conditions without utilizing the support of General Motors Technical Assistance Center.
• 10154604Dec 17, 2018Engine cooling. This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency…
• 10154601Dec 17, 2018Body and structure. This Preliminary Information communication provides information to the technician about vehicles that may have slack in one of the tailgate cables. Technician should not replace any parts for this concern. Please communicate to the customer this condition is a normal operating characteristic of their vehicle.
• 10154599Dec 17, 2018Electrical system. This Preliminary Information communication provides information to the technician about the Upfitters questions about installing aftermarket electrical accessories. Dealer should reference the latest version of General Motors Upfitter Integration Bulletin 115 for this information. It can be found at http://www.gmupfitter.com.
• 10155014Dec 13, 2018Equipment. 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).
• 10154583Dec 13, 2018Brakes. This Preliminary Information communication provides information to the technician about fluid leaking from the brake caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston installation. This grease can be cleaned off and the rest of the service completed.
• 10154581Dec 13, 2018Engine cooling. This Preliminary Information communication provides information to the technician about vehicles that have run hot and or has a tick noise. Technician should inspect the head gaskets to ensure are not installed backwards. Technician should replace the head gasket if they are found installed backwards.
• 10154981Dec 11, 2018Electrical system. This technical bulletin provides a procedure to replace the GEN I charging system with a GEN II charging system only if vehicles apply within the settings.
• 10154577Dec 11, 2018Engine cooling. This Preliminary information communicates to the dealer additional information on checking for the engne crankcase being overfull on oil causing an engine vibration concern. The technician is advised to inspect for contaminnants and adjust the engine oil level as needed.
• 10155013Dec 10, 2018Exterior lighting. This informational bulletin provides technicians with information on available BCM calibrations to restore bulb outage detection on vehicles produced by a second stage manufacturer (Upfitter), and/or turn signals flash fast after factory box removed.
• 10154992Dec 10, 2018Equipment, Fuel 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.
• 10207989Dec 7, 2018Fuel system, Air bags, Electrical system. Customer Satisfaction Program. Certain vehicles may have an incomplete or missing braze between the harness bulkhead support bracket and the fuel rail assembly. If the braze is incomplete the support bracket may detach from the fuel rail assembly over time. Wiring may sever and compromise the function of the fuel pump and/or the 4 passenger side injectors.
• 10207698Dec 7, 2018Equipment, Fuel system, Electrical system. Customer Satisfaction Program. Certain vehicles may have an incomplete or missing braze between the harness bulkhead support bracket and the fuel rail assembly. If the braze is incomplete the support bracket may detach from the fuel rail assembly over time. Wiring may sever and compromise the function of the fuel pump and/or the 4 passenger side injectors.
• 10154566Dec 6, 2018Engine cooling. This Preliminary information communicates to the technician the need to inspect the induction system for potential icing issues in very cold ambient temperatures. To allow the ice to melt so that it can be drained from the related components. That any of the listed DTC's may set with or without poor engine performance.
• 10154561Dec 4, 2018Engine cooling. This Preliminary information communicates to dealer technicians to refer to service update bulletin N182179090 for 2018 model vehicles and to use labor operation 4029959 Emissions - Customer Concern Not Duplicated (CCND) for 2017 model year vehicles with DTC P140B setting.
• 10154559Dec 4, 2018Engine cooling. This Preliminary information communicates to dealer technicians to refer to service update bulletin N182179090 for 2018 model vehicles and to use labor operation 4029959 Emissions - Customer Concern Not Duplicated (CCND) for 2017 model year vehicles with DTC P140B setting.
• 10154991Dec 3, 2018Visibility (wipers, defrost, mirrors), Lane departure. This technical bulletin provides a procedure to replace the side mirror cameras if found the cause of the reduced key fob range.
• 10154552Dec 3, 2018Engine cooling. This preliminary information document communicates a tip on the way to diagnose possible induction or exhaust air leaks using the evaporative emission cart smoke machine and ultrasonic leak detector tools.
• 10151874Nov 26, 2018Body and structure, Equipment. This Preliminary Information communication provides the technician with weight capacity for the tailgate and cargo loops in the bed.
• 10151864Nov 20, 2018Other or unknown, Engine. 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…
• 10151863Nov 19, 2018Engine, Steering. This Preliminary information communicates to the dealer a condition where a tick noise may be present inside a vehicle while driving. This may be the result of a deformed or improperly seated steering shaft seal allowing engine compartment sounds into the vehicle. Dealers are instructed to replace or reinstall the boot as needed and are informed the condition is being reviewed by engineering.
• 10151849Nov 15, 2018Electrical system. This Preliminary Information communication provides information to the technician of additional information when diagnosing a service driver assist message with a diagnostic trouble code B172E and or a B172F. The haptic seat motor has a pigtail lead coming off of it. In many cases the wiring pigtail near the haptic seat motor has broken and will require replacement.
• 10212574Nov 14, 2018Fuel system, Engine cooling. Service Update. Certain vehicles may have one or multiple DTCs that are incorrectly illuminating the service engine soon (SES) light. Hardware including fuel injectors and exhaust gas recirculation (EGR) valves may have been used to fix this issue, however, the condition could return after these repairs were made. There is no effect for vehicle performance.
• 10151842Nov 14, 2018Electrical system. This Preliminary information communicates a normal DIC message after learning keys/fobs which indicates the drivers memory position.
• 10151839Nov 14, 2018Body and structure, Equipment. This Preliminary Information communicates an issues with the headliner sagging and how to reattach the velcro using Hardman Double Bubble Epoxy part number 04001.
• 10155111Nov 8, 2018Engine. This informational bulletin provides information on characteristics of the new engine versus the old engine.
• 10155079Nov 7, 2018Equipment. This engineering informational bulletin is requesting information from the field on vehicles that have the condition of A/C Not Cool Due to No Pressure Build.
• 10155078Nov 7, 2018Body and structure, Wheels. This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Missing/Wrong Wheel Trim Shipped with New Vehicle.
• 10151817Nov 2, 2018Engine. This Preliminary information communicates to the dealer an issue where the vehicle's service engine soon light may illuminate due to trouble codes P0601-P0604, P0606, P062B, P062F, P0630, P16F3, or P262B . The dealer is to inspect the engine control module's electrical connections and for proper powers and grounds. Dealer instructed to replace the Engine Control Module, if no other issues found.
• 10155080Nov 1, 2018Equipment. This engineering informational bulletin is requesting information pictures of windshield, steering wheel and/or door trim panel for product issues covered under warranty.
• 10147392Oct 19, 2018Brakes. This Preliminary Information communication provides information to the technician about vehicles that have a detent / click with a feel of increased resistance when the accelerator pedal is about ¾ of the way. The new accelerator pedal design has a built-in detent position near the last 1/4 of pedal travel. Dealer should communicate to the customer this is a normal operating characteristic of the vehicle and…
• 10145501Sep 19, 2018Transmission and drivetrain. This Preliminary information communicatesSES lamp, setting DTC P0333 when shifting the Transmissionfrom park.DTC P0333 cansetdue to voltage from the Transmission park/neutral signal 1circuit bleeding into the knock sensor system circuits.If SI does not isolate the concern inspect the K20 ECM connector X2 looking for debris, connectorand or terminal concerns.
• 10145486Sep 14, 2018Suspension. This Preliminary Information communication provides information to the technician with the steps to diagnosis and repair vehicles with various handling, vehicle dynamics concerns, noises from the suspension or underbody, or issues related to damaged suspension components. Before any in-depth diagnostics are performed, be aware that various issues could occur if the vehicle has been modified and inform the customer…
• 10145479Sep 13, 2018Brakes. This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have issues were the customer will need increased effort to depress the brake pedal. Technician may find fluid in the brake booster and/or the booster vacuum line. Technician will need to replace Vacuum Pump, Brake Booster, Master Cylinder, Vacuum Pump Belt and the Vacuum Line…
• 10143459Jun 27, 2018Equipment, Engine. This Preliminary Information communication provides information to the technician about vehicles that have the oil pressure gauge jumps from approximately 40 lb. to 60 lb. The 4.3L (LV3), 5.3L (L83), 6.2L (L86) engines are equipped with a two stage oil pump. Dealer should advise the customer this is normal operation for these engines.
• 10143438Jun 12, 2018Engine cooling. This Preliminary information communicates. A vehicle may have a concern ofDTCP050D setting along with a P0300 after a cold start up. White smoke and/or coolant odor may come from exhaust for an extended period of time at cold start as well. Cause Coolant getting into the cylinders, and provides direction for the repair.
• 10143434Jun 12, 2018Steering. This Preliminary information communicates a repair procedure for a squeak/squawk type noise coming from the lower column/drivers foot well area when turning. It explains how to properly lubricate the column shaft boot where the shaft interacts with the boot where it passes through the boot.
• 10143430Jun 12, 2018Suspension, Body and structure. This Preliminary Information communication provides information to the technician about vehicles that have a creak, click, pop, and or crack type noise from the front suspension or front frame area while making tight turns. Technician will need to loosen and then re-torque the four front frame cross member nuts and bolts.
• 10143424Jun 6, 2018Engine cooling. This Preliminary information communicates. A vehicle may have a concern of DTCP050D setting along with a P0300 after a cold start up. White smoke and/or coolant odor may come from exhaust for an extended period of time at cold start as well. Cause Coolant getting into the cylinders, and provides direction for the repair.
• 10141379May 30, 2018Seats, Equipment. This Preliminary Information communication provides information to the technician about vehicle that may have a front driver's or passenger's seat back may lean or be turned outward. Technician will need to remove the seat bottom trim cover and reinstall it completely and squarely to the cushion to correct the concern.
• 10141372May 24, 2018Brakes, Electrical system. This Preliminary Information communication provides information to the technician about vehicles that may have a diagnostic trouble code U0159 set in the instrument panel cluster and/or the body control module. For vehicles equipped with Ultrasonic Park Assist System Regular Production Option Code UD5 or UD7 technician will use Service Programming System to reprogram the Parking Assist Control Module to correct…
• 10141370May 22, 2018Equipment, Steering. This Preliminary information communicates to the dealer a condition where a tick noise may be present inside a vehicle while driving. This may be the result of a deformed or improperly seated steering shaft seal allowing engine compartment sounds into the vehicle. Dealers are instructed to replace or reinstall the boot as needed and are informed the condition is being reviewed by engineering.
• 10141367May 22, 2018Electrical system. This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System” message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake…

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