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NHTSA ID Number: 10183194
Manufacturer Communication Number: 20NA177
Summary
This technical bulletin provides repair information to correct a customer concern of the loss of air pressure causing rear air suspension bags not to inflate.
Parts Information
| Causal Part | Description | Part Number | Qty |
| X | VALVE ASM,RR AIR SUSP LVLG | 19407966 | 1 |
SEOCONTENT-START
Copyright 2020 General Motors
LLC. All Rights Reserved.
Service Bulletin Bulletin No.: 20-NA-177
Date: October, 2020
TECHNICAL
Subject: Loss of Air Pressure Causing Rear Air Suspension Bags Not to Inflate
Brand: Model:
Model Year: VIN: Engine: Transmission:
from to from to
Chevrolet Silverado 4500HD,
5500HD and 6500HD 2019 2020 All All
Involved Region or Country North America,
Additional Options (RPOs) GP1 – 13,500 Rear Air Suspension, GP8 – 15,500 Rear Air Suspension, G40 – 19,000
Rear Air Suspension
Condition Some customers may comment on the rear air suspension bags deflating and not reinflating.
Cause The cause of the condition may be the air spring leveling valve gasket fails, causing a
large air leak.
Correction Upon confirming the Condition, replace the rear air suspension leveling control valve.
Refer to Rear Air Suspension Leveling Control Valve Replacement, in SI.
Parts Information
Causal
Part
Description Part
Number
Qty
X VALVE ASM,RR
AIR SUSP LVLG
19407966 1
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation Description Labor Time
8000510 Rear Air Suspension Leveling Control Valve Replacement Use Published Labor
Operation Time
Version 1
Modified Released October 23, 2020
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.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION
SEOCONTENT-END
2 Affected Products
Vehicle
| MAKE | MODEL | YEAR |
| CHEVROLET | SILVERADO 4500HD | 2019-2020 |
1 Associated Document
Manufacturer Communications
MC-10183194-9999.pdf 494.492KB
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