PIT3472A

Bulletin No.: PIT3472A
Published date: 03/22/2019
Preliminary Information
PIT3472A Rear Suspension Sags/Leak Down Speci cation
Models
Brand:
Hummer
Model:
H2
Model Years:
2003 - 2005
VIN:
from
All
Engine:
to
All
All
Transmissions:
All
Supersession Statement
This PI was superseded to update keywords. Please discard PIT3472.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition / Concern
Some customers may comment that the rear end of the vehicle appears to sag after the
vehicle sits overnight or longer. After the vehicle is started, the compressor will engage and
the rear of the vehicle will rise to normal operating level.
Recommendations / Instructions
To correctly measure for a concern, use the rear suspension "D" height measurement. The D
height is obtained by measuring the distance between the edge of the jounce cup along the
jounce bumper center line and the jounce pad on the rear axle (See SI Document ID#
796914).
A 1.0 mm (0.040 in) leak down drop of the rear end over a 24 hour period is considered
normal.
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.
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