SB-10057272-1285

GM Bulletin No.: 14688
Date: January 2015

Service Bulletin

SERVICE UPDATE
SUBJECT:

Service Update for Inventory and Customer Vehicles
Engine Bearing Bedplate Mismatched to Engine Block
Expires with Base Warranty

MODELS:

2015 Chevrolet Malibu, Impala
Equipped with 4 Cylinder Engine (RPO LKW)

This service update includes vehicles in dealer inventory and customer vehicles that return to the
dealership for any reason. This bulletin will expire at the end of the involved vehicle's New Vehicle
Limited Warranty period.
PURPOSE
This bulletin provides a service procedure to inspect engine bearing bedplate and engine block
serial numbers on certain 2015 model year Chevrolet Malibu and Impala vehicles equipped with
a 4 cylinder engine (RPO LKW) to ensure that they match. If the serial numbers match, no further
action is required. If the serial numbers do not match, the engine must be replaced.
This service procedure should be completed as soon as possible on involved vehicles
currently in dealer inventory and customer vehicles that return to the dealer for any type
of service during the New Vehicle Limited Warranty coverage period.
VEHICLES INVOLVED
All involved vehicles are identified by VIN on the Investigate Vehicle History screen in the Global
Warranty Management system. Dealership technicians should always check this site to confirm
vehicle involvement prior to beginning any required inspections and/or repairs. It is important to
routinely verify vehicle eligibility because not all similar vehicles may be involved regardless of
description or option content.
Additionally, a list of involved vehicles currently in dealer inventory is available on the “Service
Update Bulletin Information” link under the “Service” tab in GM GlobalConnect (U.S.) or attached
to the GlobalConnect message (Canada) used to release this bulletin. Customer vehicles that
return for service, for any reason, and are still covered under the vehicle's base warranty should
also be checked for vehicle eligibility.
Copyright 2015 General Motors. All Rights Reserved.

Page 2

January 2015

Bulletin No.: 14688

PART INFORMATION
Parts required to complete this service update are to be obtained from General Motors Customer
Care and Aftersales (GMCCA). Please refer to your “involved vehicles listing” before ordering
parts. Normal orders should be placed on a DRO = Daily Replenishment Order. In an emergency
situation, parts should be ordered on a CSO = Customer Special Order.
Part Number
12656343

Description
ENGINE ASM-GASOLINE (SERVICE)

Quantity/Vehicle
1 (If Needed)

SPECIAL TOOLS
A borescope is required to complete the inspection in this bulletin. If your dealership does NOT
have a borescope, this bulletin provides a net item allowance to purchase one borescope. Some
entry-level borescopes can be purchased for $20.00-30.00 but require a laptop computer to view
images. The Cen-Tech Digital Inspection Camera, P/N 67979, can be purchased for under
$100.00 and includes the following features:






On-screen image reverse and 180 degree rotation.
38 inch watertight flex shaft with 16 mm CMOS video imager head.
Built-in 2.4 inch color LCD display with 480 X 234 resolution.
Oil and scratch resistant tempered glass lens.
Two white LED lamps for low light viewing.

SERVICE PROCEDURE
1. Open the hood and locate the exhaust manifold heat shield.
2. Remove the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield
Replacement in SI.

4036684

Page 3

January 2015

Bulletin No.: 14688

Note: A borescope is required to view the engine block number (1) and engine block bed plate
(2) numbers.

4036687

3. Route the borescope under the exhaust manifold as shown in the photograph to gain access
to the engine block.
4. Using a borescope locate the engine block number and engine block bed plate number. The
numbers are located behind the A/C compressor and on the engine block.
5. Determine if the first 12 digits of the engine block number are the same as the first 12 digits
of the engine block bed plate number.


If the part numbers are the same, no further action is required. Install the exhaust
manifold heat shield and close the hood. Refer to Exhaust Manifold Heat Shield
Replacement in SI.



If the part numbers are NOT the same, remove and replace the engine. Refer to Engine
Replacement in SI.

Page 4

January 2015

Bulletin No.: 14688

WARRANTY TRANSACTION INFORMATION
Submit a transaction using the table below. All transactions should be submitted as a ZFAT
transaction type, unless noted otherwise.
Labor
Code
9101137
9101205

Description
Inspect Engine Bedplate and Engine Block Serial Numbers *
Purchase of Borescope or Camera, if Required
One-Time Submission per Dealership

Labor
Time
0.5
N/A

Net
Item
N/A
**

* If engine replacement is required, also submit a ZREG transaction type using the appropriate
labor code and labor time published in the Labor Time Guide.
** The amount identified in Net Item should represent the cost to purchase a borescope or camera
if the dealership does not currently own one of these special tools. This amount should not to
exceed $100.00 USD or $118.00 CAD. This is a one-time charge per dealership, if required.
DEALER PROGRAM RESPONSIBILITY
Whenever a vehicle subject to this service update enters your vehicle inventory, or is in your facility
for service in the future, and the vehicle is still covered under the New Vehicle Limited Warranty,
you must take the steps necessary to be sure the service update correction has been made before
selling or releasing the vehicle.

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 tools,
equipment, 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 dealer for information on whether your vehicle may benefit from the information.

We Support
Voluntary Technician
Certification