DANGER 97BLUEYUK DANGER.
DO NOT FLUSH THE TRANNY! DO NOT FLUSH THE TRANNY!
STAND DOWN! STAND DOWN!
PAN DROP ONLY! PAN DROP ONLY!
Vehicle - Engine And Sub-Systems Flushing Recommendations INFORMATION
Bulletin No.: 04-06-01-029G
Date: September 27, 2012
Subject: Unscheduled Supplemental Services (Including Flushing Services and Additives) and Proper use of GM Simplified Maintenance Schedules (U.S. Only)
Models:
2013 and Prior GM Passenger Cars and Trucks Attention:
This bulletin is applicable to U.S. dealers only. Dealers in Canada refer to the latest version of Corporate Bulletin Number 12-06-01-008. Supercede:
This bulletin is being revised to update information. Please discard Corporate Bulletin Number 04-06-01-029F (Section 06 - Engine/Propulsion System). Service is Important to You and Your Customer
General Motors takes great pride in offering our dealerships and customers high quality vehicles that require extremely low maintenance over the life of the vehicle. This low cost of ownership builds repeat sales and offers our customers measurable economy of operation against competing vehicles. Our goal is to make the customer experience a key driver of why customers purchase GM products and services. Providing responsible services at the proper intervals supports this goal and will help your dealership earn repeat business.
An Overview of Proper Vehicle Service
Today, many of your service departments merchandise supplemental services and fluids to customers indicating that these "flushes" have a positive effect on durability of the component part. It should be noted that analyses of returned parts that have been exposed to these aftermarket "flushes" show indications of potential damage and shortened durability.
The following information clearly defines the guidelines for servicing GM vehicles.
GM Authorized Service Information is Detailed, Descriptive and Complete
If GM determines that a specific model vehicle or powertrain needs supplemental service, GM will issue an Authorized Service Document with detailed service procedures that will identify any machine, tool or chemical required to conduct proper vehicle servicing. Listed below are a few examples of those messages as well as additional guidelines:
Engine Crankcase Flushing
General Motors Corporation does not endorse or recommend engine crankcase flushing for any of its gasoline engines. Analysis of some of the aftermarket materials used for crankcase flushing indicate incompatibility with GM engine components and the potential for damage to some engine seals and bearings. Damage to engine components resulting from crankcase flushing IS NOT COVERED under the terms of the New Vehicle Warranty.
Subsystem Flushing
Flushing of air conditioning (A/C) lines, radiators, transmission coolers, and power steering systems are recognized practices to be performed after catastrophic failures or extreme corrosion when encountered in radiators. For acceptable A/C flushing concerns, refer to the Flushing procedure in Service Information (SI). This practice is not required or recommended for normal service operations.
The use of external transmission fluid exchange or flush machines is not recommended for the automatic or manual transmission. Use of external machines to replace the fluid may affect the operation or durability of the transmission. Transmission fluid should only be replaced by draining and refilling following procedures in Service Information (SI). Refer to Automatic/Manual Transmission Fluid and Filter Replacement.
Approved Transmission Flushing Tool (Transmission Cooler Only)
The Automatic Transmission Oil Cooler Flow Check and Flush Tool IS recommended for GM vehicles. Refer to Transmission Fluid Cooler Flow Check and Flush in the Service Information website using the J-45096.
