File in Section:
Bulletin No.:

Service Bulletin

Date:

06 - Engine
14-06-04-002
January, 2014

INFORMATION
Subject:

Information for No Start Due to Inoperative LPG Fuel Pump Resulting From Upfitter
Revisions

Models:

2012-2014 Chevrolet Express
2012-2014 GMC Savana
Equipped with Liquefied Petroleum Gas (LPG) — RPO KO7

Condition
Some customers may comment that their vehicle will
not start. They may also comment that the condition is
intermittent.

Correction
•

Cause
An inoperative LPG fuel pump may be caused by an
improperly connected G400 terminal. This condition
may be the result of one or more of the following:
The necessity of the upfitter removing and repositioning
the G400 terminal from its original factory location to
another location on the chassis frame rail.
Specifically:
The upfitter not properly preparing the chassis frame
surface area selected for the new ground location for
good electrical contact.
The upfitter not properly preparing the electrical contact
area of the G400 terminal and not using a new
replacement fastener with a conductive finish to secure
the terminal.
The upfitter not properly finishing the area to provide
corrosion control.

Copyright 2014 General Motors LLC. All Rights Reserved.

•

•

For information on correctly performing an
electrical ground repair, refer to the latest version
of Corporate Bulletin 10-08-45-001: Information
for Electrical Ground Repair - Use New
Replacement Fasteners with Conductive Finish.
For information on correctly performing the
procedures for prepping and corrosion control,
refer to the latest version of #PI0564D: Wax
Coating on Frame Peeling, Metal Shows
Corrosion/Rusting.
For information on selecting the proper products
and coatings that GM believes to be reliable,
refer to the latest version of Corporate
Bulletin 01-08-51-003: Application of
Anti-Corrosion Materials.

Page 2

January, 2014

Bulletin No.: 14-06-04-002

When replacing an LPG fuel pump that has failed, the
following MUST be performed to ensure the integrity
of G400:

3679788

3679777

1. Review the original OEM location of G400 (4) in
the graphic. The new G400 location selected by
the upfitter will be in this general area of the
chassis frame.

3679786

2. Review the graphics of the several new G400
locations that were possibly selected for use by the
upfitter on the chassis frame in order to become
familiar with the various locations.
3. Using GM approved residue-free solvent or
equivalent, remove any grease from the G400
terminal.
4. Disconnect and remove the G400 terminal from the
chassis frame.
5. Carefully remove any corrosion from both sides of
the G400 terminal.
6. Using GM approved residue-free solvent or
equivalent, remove any grease from the area and
allow to dry.
7. Carefully remove any factory coating from the area
until clean bare metal is visible.
8. Prep the repair area, as outlined in the
Recommendations/Instructions in the latest
version of #PI0564D: Wax Coating on Frame
Peeling, Metal Shows Corrosion/Rusting.
9. Select a conductive fastener for the repair. Refer to
Corporate Bulletin 10-08-45-001: Information for
Electrical Ground Repair - Use New Replacement
Fasteners with Conductive Finish.
10. Using a small brush, apply Dielectric Lubricant to
both sides of the G400 terminal, install and secure
as needed.
11. Perform the corrosion control procedure as
outlined in the Recommendations/Instructions
in #PI0564D.

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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