2026 GMC Sierra 3500 technical service bulletins
174 technical service bulletins and manufacturer communications cover the 2026 GMC Sierra 3500.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
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- This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a...
- Customer Satisfaction Program
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- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
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- Received transmission mounting bolts that do not meet expected hardness specifications
- This PI is created to inform GM dealers that some vehicles may intermittently fail to connect wireless...
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- This PI is created to inform GM dealers that some vehicles may intermittently fail to connect wireless...
- Customer Satisfaction Program
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- This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set...
- This PI communicates diagnostic information to assist Technicians with a possible transmission shudder
- This PI provides information to repair the door water deflector which is not sealed properly allows water...
- This PI provides diagnostic tips for diagnosing electric trailer brakes issues.
- PI to help diagnose A/C concern
- This PI was created to help avoid unnecessary front camera module replacements
- The purpose of this PI is to inform dealer technicians of a normal cab pressure relief valve noise to...
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- Condition in which the bolts for the transmission control valve body may be loose or missing
- This PI advises dealers that if the K160 Brake System Control Module sets DTC P0606 along with P0562...
- This PI provides diagnostic steps for dealer technicians to verify the condition and ensure that part...
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- Pi created to provide GM dealers with information on gathering information for projection issue
- This PI states that if SDGM DTC U3000 Sym 49 is set and no other SDGM DTCs are present, clear DTCs and...
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- PI created to provide dealer technicians with procedures for updating Google Maps.
- Certain vehicles listed above may be equipped with a trailer hitch label that understates hitch capability
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- This PI communicates information informing dealers that Engineering is aware of the clunk noise and is...
- This PI communicates information that the customers fifth wheel hitch may not latch into the factory box...
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- Certain vehicles, equipped with Snowplow Prep Package RPO VYU, may be missing an accessory harness
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- PI to explain normal operation for a concern that the outside rearview mirrors may not fold when the doors...
- Water intrusion due to a hole in the cabin Pressure Relief Valve
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- Condition where the trailer hitch label understates hitch capability
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- This PI provides diagnostics tips to dealership techs when trying to diagnose a CAN Bus communication...
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- This PI Communications information on an alternative product dealers can use to perform 19-NA-255: Wax...
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- This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered...
- This PI Communicates information to inform technicians that PTO Configuration has moved from PTO Module to...
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- Service Update
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- The Driver Information Center may display a message of Transport Mode On after the ignition is cycled.
- New Vehicle Monitoring Programs Section in IVH
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- This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
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- This service bulletin provides information on Tire Sidewall Irregularities.
- This service bulletin provides information for the technicians to use a Customer Concern Verification...
- This service bulletin provides information to dealership personnel for new vehicles with less than 1,000...
- This warranty administration bulletin provides information for dealers/technicians on System Reset and...
- This warranty administration bulletin provides policy information on vehicles outside of a California...
- This warranty administration bulletin provides policy information for GM courtesy transportation and...
- This service bulletin provides information on the proper Reflective High Temperature Heat and/or...
- The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential...
- This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be...
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