NHTSA ID Number: 11028857
Manufacturer Communication Number: PIT6120C
TSB/Document Date: 2026-02-18
Summary
This Preliminary information communicates information to direct to GM Upfitter bulletin 193 or 205 depending on trim level for installation instructions for the 9L7 Upfitter Switches.
Bulletin No.: PIT6120C
Service Bulletin
Date: February, 2026
PRELIMINARY INFORMATION
Subject:
Brand:
Installation of Upfitter Auxiliary Switches (RPO 9L7)
Model:
Model Year:
from
VIN:
to
from
Engine:
to
Silverado
1500 New
(RPO J22,
VIN Digit 5
= A / D)
2022
All
All
All
All
Silverado
1500
2023-2025
All
All
All
All
Silverado
2500HD
2024-2025
All
All
All
All
Silverado
3500HD
2024-2025
All
All
All
All
Sierra 1500
2022
New (RPO
J22, VIN Digit
5 = H / U)
All
All
All
All
Sierra 1500
2023-2025
All
All
All
All
Sierra
2500HD
2024-2025
All
All
All
All
Sierra
3500HD
2024-2025
All
All
All
All
Involved Region or Country
North America
Additional Options (RPO)
9L7
Condition
A Dealer or Upfitter may be looking for information on installing RPO 9L7 Upfitter
Auxiliary Switches.
The Upfitter Auxiliary Switches are located under the climate controls in the center of the
dash.
Cause
Information not readily available in Service Information (SI.)
Correction
Reference the latest version of GM Upfitter Integration Bulletin 193 or 205 depending on trim level. The information
can be found at http://www.gmupfitter.com/ under the "Technical Bulletin" Tab and then "Show all bulletins."
Note: Installation of the Upfitter (AUX) Switches and supporting components are NOT a GM Warranty or PDI
covered labor cost. The installation of the switches/components are intended to be performed by the upfitter as a
part of the overall vehicle upfit and the labor cost associated with that installation be covered in the upfitter’s
estimate to its customer. Installation, when performed by a GM dealer, the labor charges associated with that install
are the responsibility of the customer/vehicle purchaser.
Copyright 2026 General Motors
. All Rights Reserved.
Page 2
February, 2026
Version
3
Modified
01/30/2024 - Created on.
09/18/2024 - Updated Model Year
02/14/2025 - Updated Correction Information
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job
properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
Bulletin No.: PIT6120C
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TSB/Document ID: PIT6120C
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-12
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: UNKNOWN OR OTHER
MFR Component System:
MFR Component Subsystem:
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