For 1990-2009 cars

# SMU - SECTION 7A AUTO. TRANS DIAG.(UPDATED TCC WIRING DIAG)

#### Subject: SERVICE MANUAL UPDATE - SECTION 7A AUTOMATIC TRANSMISSION DIAGNOSIS (UPDATED TCC WIRING DIAGRAMS)

#### Models Affected: 1993 FIREBIRD MODELS TRANSMISSION 4L60 (MD8) ALL TRANSMISSION MODELS

New Product Information for 1993 HYDRA-MATIC 4L60 transmissions. This information has been updated since publication of the 1993 Service Manual and should be noted accordingly. Be certain to familiarize yourself with these updates to properly repair the 1993 HYDRA-MATIC 4L60 transmission.

#### Service Manual Reference:

Update your 1993 Service Manual Section 7A-15A Automatic Transmission Diagnosis with the following three (3) pages of updated TCC wiring diagrams.

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.