ELECTRONIC CLIMATE CONTROL BLOWER SPEED TOO HIGH. Cadillac Commercial Limo/Hearse Chassis 1991

For 1990-2009 cars

# ELECTRONIC CLIMATE CONTROL BLOWER SPEED TOO HIGH

#### SUBJECT: ECC BLOWER SPEED TOO HIGH (NEW PART)

#### MODELS AFFECTED: 1991 "C" MODELS

Some 1991 DeVilles and Fleetwoods (start of production through M4305189) may experience excess air from the side window defog or defrost creating a drafty climate from the E or an air "rush" noise from the HVAC outlets caused by the blower speed remaining on high speed for an extended period while set in "auto" mode.

#### Note: A change was made during the 1991 model year moving the "Cadillac" script above the glove box. This change moves the script from a recessed position in the instrument panel to a "stand out" position. This was done to allow more air flow over the in-car sensor. The high blower speed was needed to push more air over the sensor prior to the script relocation. Now that the blower speed is being reduced, it is necessary to make sure that the revised script has been installed on the vehicle.

#### CORRECTION:

------------ 1. Inspect "Cadillac" script located on the instrument panel above the glove box door.

2. If script is recessed or flush with the instrument panel, remove and replace with P/N 25602888.

#### Note: If script stands out away from the instrument panel, proceed to step 3.

3. Install new PROM, P/N 16164048.

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.