PIT4506C

File in Section:
Service Bulletin
Bulletin No.:
Date:
PIT4506C
October, 2012
PRELIMINARY INFORMATION
Subject:
Questions Regarding Reducing Tire Pressures
Models:
2007-2013 Chevrolet Silverado HD and Suburban 2500
2007-2013 GMC Sierra HD and Yukon XL 2500
This PI was superseded to update model years. Please discard PIT4506B.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/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.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.