PIT5194

Service Bulletin Details

Public Details for: PIT5194

This preliminary information communication provides information to the technician about vehicles that will no longer sit level after rear suspension has been serviced. Technician should correctly install the air spring lines that are incorr


- 2009 - 2008 - 2007 - 2006 - 2005 - 2004 - 2003 -

Models from 2009
2009 HUMMER H2
Models from 2008
2008 HUMMER H2
Models from 2007
2007 HUMMER H2
Models from 2006
2006 HUMMER H2
Models from 2005
2005 HUMMER H2
Models from 2004
2004 HUMMER H2
Models from 2003
2003 HUMMER H2 
Bulletin No.: PIT5194
Date: Dec-2012
Subject:
Rear Air Suspension Leans To One Side After Repairs
Models:
2003-2009 Hummer H2
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Some owners may comment that after some type of service work to the rear suspension, it no longer sits level. If the Tech 2 is used to perform the Special
Function "Calibrate Trim Height" the rear suspension may sit level at first, but once the vehicle is driven it will become unleveled.
Recommendation/Instructions
This concern could be caused by the rear air spring lines installed incorrectly to the air inlet valves. The right air spring line should connect to the air inlet valve
on the right side and the left air spring line should connect to the air inlet valve on the left side. See example below of a dual stage compressor items 5 and 6,
single stage compressor is similar.
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1.
C451
2.
Air Suspension Compressor 1 Connector
3.
Air Suspension Compressor 2 Connector
4.
Air Suspension Pressure Sensor
5.
Air Suspension Inlet Valve-LR
6.
Air Suspension Inlet Valve-RR
7.
Air Suspension Exhaust Valve Connector
8.
Air Suspension Air Dryer
9.
Air Suspension Compressor 1
10. Air Suspension Compressor 2
11. Air Suspension Module
12. C450
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 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.
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