NHTSA ID Number: 11028931
Manufacturer Communication Number: PIT4506J
TSB/Document Date: 2026-02-23
Summary
This Preliminary Information communication provides information to the technician that some owners of Heavy Duty Trucks and Utilities may ask if they can lower their tire pressures. Tire pressures being set to the "Tire and Loading Label" will ensure the safe handling and ride characteristics of the truck and should not be lowered.
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TSB/Document ID: PIT4506J
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-16
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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Bulletin No.: PIT4506J
Service Bulletin
Date: February, 2026
PRELIMINARY INFORMATION
Subject:
Questions Regarding Reducing Tire Pressures
Brand:
Model:
Model Year:
from
VIN:
to
from
Transmission:
to
Silverado
2500
2007 - 2026
All
All
All
All
Silverado
3500
2007 - 2026
All
All
All
All
Suburban
2500
2007 - 2013
All
All
All
All
Suburban
3500 HD
2016 - 2019
All
All
All
All
Sierra 2500
2007 - 2026
All
All
All
All
Sierra 3500
2007 - 2026
All
All
All
All
Yukon XL
2500
2007 - 2013
All
All
All
All
Supersession Statement
This PI was superseded to update model years. Please discard PIT4506H.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condiiton/Concern
Some owners of HD Trucks and Utilities may ask if they can lower their tire pressures from what is recommended on
the "Tire and Loading Label" if the vehicle is not being used for hauling or towing.
Recommendation/Instructions
The answer is no. Tire pressures being set to the "Tire and Loading Label" will ensure the safe handling and ride
characteristics of the truck. Ride, handling, tire wear, fuel economy, and road noise concerns may be caused by
improperly adjusted tire pressure.
Note: If the tire pressures are lowered on a vehicle equipped with Tire Pressure Monitor, the "Check Tire Pressure"
message may display on the DIC. The Tire Pressure Monitor system was implemented to meet FMVSS 139 and
cannot be removed or disabled.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is
resolved without completing every step, the remaining steps do not need to be performed.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
WE SUPPORT VOLUNTARY
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
TECHNICIAN
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job
CERTIFICATION
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
Copyright 2026 General Motors. All Rights Reserved.
information.
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