Bulletin No.: PIP5579A
Published date: 10/29/2018

Preliminary Information
PIP5579A Front and Rear Axle Restriction for Vehicles with RPO
SU5 SU8
Models
Brand:

Model:

Model Years:

VIN:
from

to

Engine:

Transmissions:

Chevrolet

Silverado 1500 (New Model)

2019

All

All

All

All

GMC

Sierra 1500 (New Model)

2019

All

All

All

All

Involved Region or
Country

North America

Additional Options
(RPO)

SU5 or SU8

Condition

Part restriction

Cause

New Product Monitoring

As part of our ongoing and continuous improvement we have placed the front and rear axles
on restriction, to ensure that we get undisturbed parts returned for root cause analysis.
Only the axle corresponding to the RPO listed above or the following part numbers are
included in this restriction. PN: 84536841, 84536840, 84573714, 84573715, 23243853,
84458156, 84454841, 23243766, 23243764, 84412729, 84459307, 84459322, 23243842,
23243845, 84459305, 84584310, 84412728, 84127132, 23243585, 11548535, 84443626,
84092759, 84092756, 23266134, 23243725
Please fill out the template below prior to contacting PQC.
Caller's First & Last Name/Position:
Technician's Name/Direct Phone:
Parts Manager's Name:
Dealership's Fax Number:
Parts Fax Number:
Q1:

Customer’s Concern:

Q2:

Has the vehicle been modified with non-production accessories?

Q3:

Is the vehicle for personal or commercial use?

Q4:

Has dealer completed the Front/Rear Axle Lubricant Level Inspection in SI? (Y/N)

Q5: Has the Front Axle actuator 5 amp fuse been verify as good? (Y/N)

If no, check the amp fuse
If yes, continue to next question
Q6: Are there any leaks (Y/N)
If no, continue to next question
If yes,
What type of leak?
Location of the leak ?
Q7:

Are there any Noises (Y/N)
If no, continue to next question
If yes, complete the following
What kind of noise?
Location and frequency of the noise ?
When does is occur?

Q8:

Are there any Vibration: (Y/N)
If no, continue to next question
If yes, complete the following
When does is occur?
Pico scope data available for engineering review (Y/N)
If yes, continue to next question
If no, Please have pico scope data available

NOTE: If a P1 vibration was noticed check the rear prop shaft and rear axle flange and verify
that the paint dots on both parts are lined up. If not re index the prop shaft and verify the
concern still exists.
Q9:

Failed Axle Serial Number (located on label):

Pictures labeled 1 and 2 below show the tag location on the front differential. Item 2 is near
the actuator.

Rear Axle tag location is inboard side of the left hand shock bracket.

Parts Information
Use the vehicle identification number (VIN), SI, and the GM Electronic Parts Catalog to
determine the proper part to request.

Version History
Version

Modi ed

2
8/8/2018 - Created on
10/29/2018 - added part numbers 23243853, 84458156, 84454841,
23243766, 23243764, 84412729, 84459307, 84459322,
23243842, 23243845, 84459305, 84584310, 84412728,
84127132, 23243585, 11548535, 84443626,
84092759, 84092756, 23266134, 23243725

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