SERVICE REPLACEMENT TRANSMISSION ASSEMBLY

Model and Year: 1988-90 C1,2, K1,2 TRUCKS

TO: ALL CHEVROLET DEALERS

This bulletin provides information on a new service replacement transmission assembly (SRTA) program for HM-290/Hydra-Matic 5LM60 transmissions. SRTA models can be ordered for all 1988-1990 models from your local General Motors Service Parts Organization (GMSPO) Parts Distribution Center.

SRTA ADVANTAGES:

-A SRTA is the product of a highly successful, customer satisfaction driven program that parallels the existing THM 125C/HYDRA-MATIC 3T40, THM 440-T4/HYDRA-MATIC 4T60 and 700-R4/HYDRA-MATIC 4L60 programs. It provides the technician with a service alternative when addressing diagnostic and overhaul concerns.

-All SRTA units are designed and remanufactured to updated Hydra-matic engineering specifications and are often less costly than a major overhaul.

-GMSPO Parts Distribution Centers are committed to 48 hour maximum delivery time for all SRTA models, with no VIP charges.

In the interest of customer satisfaction, SRTA models should only be considered when the projected cost of repair exceeds the cost of a SRTA replacement.

SECTION PAGE

SRTA Processing Procedures 2-7 HM-290/HYDRA-MATIC 5LM60 Transmission Identification 8 SRTA Model Replacement Chart 8

SRTA PROCESSING PROCEDURES

Each SRTA unit will be shipped in a container which must be used for core return of the original HM-290/HYDRA-MATIC 5LM60 assembly. A SRTA information packet is included with each SRTA unit. The contents of this envelope are to be removed and used as described with each illustration on the following pages.

SRTA PROCESSING PROCEDURES - INFORMATION PACKET

The contents of this envelope include Limited Warranty Information, Dealer Product Feedback Form, Core Exchange Return Procedure, and a pre-addressed return mailing envelope. A dealer representative is to explain all warranty information contained in this envelope to the customer.

SRTA PROCESSING PROCEDURES - CORE EXCHANGE RETURN

The core return procedure provides detailed instructions for the GM dealer on handling of the SRTA and original HM-290/HYDRA-MATIC 5LM60 units. This sheet can be discarded after use.

IMPORTANT CORE CREDIT INFORMATION: A remanufactured shift tower will be included as part of your 5LM60 SRTA unit. The original shift tower must be returned with your core unit in order to assure core credit.

SRTA PROCESSING PROCEDURES - CORE SHIPPING INFORMATION

Please refer to the form shown below and on the following pages for important shipping information.

SRTA PROCESSING PROCEDURES - FAILURE ANALYSIS INFORMATION

This Product Feedback Form is to be completed by the service manager and/or technician. Fill out the form as completely as possible to provide information which can be used for analysis. This valuable input can result in future product refinement through corrective action. Insert the white copy of the completed form and a copy of the repair order into the SRTA information Packet envelope, reseal the envelope and wire tag it to the bell housing of the unit being returned for core exchange. Return the yellow copy of the completed Product Feedback Form, using the postage paid envelope, to Hydra-matic Division.

HM-290/HYDRA-MATIC 5LM60 TRANSMISSION IDENTIFICATION INFORMATION ---------------------------------------------------------------- Transmission identification information and the SRTA model replacement chart will assist in selecting the correct SRTA unit to order from your local Parts Distribution Center.

HM-290/HYDRA-MATIC 5LM60 SRTA MODEL REPLACEMENT CHART

SRTA PART ORIGINAL TRANSMISSION USAGE MODEL NUMBER 1988 1989 1990 ----- ------ ---- ---- ---- OUCU 8672960 C-Truck (2-Wheel Drive) OUDU 8672961 K-Truck (4-Wheel Drive)

Parts are currently available from GMSPO.

NOTE: Part numbers are accurate at time of printing and subject to change. Refer to the latest GMSPO Parts Catalog for part numbers of SRTA models listed.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those 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 a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.