Bulletin No.: PI1013A
Date: Jul-2013

Subject:

A/C Blows Warm Air Intermittently

Models:

2013 Chevrolet Spark

This PI has been revised to update the Recommendation/Instructions. Please discard PI1013.

Condition/Concern
Some customers may comment on the A/C blowing warm air intermittently out of the ducts when driving at highway speeds and more noticeable on longer
commutes with higher humidity.
This condition may be caused by the evaporator freezing to the point that air flow may not be able to pass through the evaporator.

Recommendation/Instructions
If the vehicle is built after November 21, 2012
Verify the vehicle has the latest calibrations in the BCM for the HVAC system. If not, update the BCM software with the current calibration in TIS2Web. Refer to
Body Control Module Programming and Setup in SI.

If vehicles were built prior to November 22, 2012 then follow the procedures below.
Replace the temperature cam link and the evaporative air temperature (EAT) sensor following the procedure below:

1.

Replace the WHITE temperature cam link (3) shown in the illustration above with a black colored cam link. Refer to Temperature Valve Link
Replacement in SI.
Note: If the temperature cam link is black in color and the vehicle is built prior to November 22, 2012 then this procedure has already been completed.

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2.

Remove the (EAT) sensor by turning the top of the sensor left and pull out.

3.

Disconnect the wiring connector from the sensor.

4.

Install the new sensor with the arrow at the 9 o’clock position, then turn right to the 12 o’clock position.

5.

Connect the wiring connector.
Note: To determine if a new EAT sensor has already been installed, the new EAT sensor will be bent upwards and to the left of the base arrow. The
new sensor in natural in color.

Parts Information
IMPORTANT NOTE WHEN PRINTING THIS FORM: If the form prints out on two pages, make certain you fax BOTH pages so that the WPC receives all the
needed information. Missing information will delay or prevent the part from being shipped.
Parts Request Form – Warranty Parts Center

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Use this form ONLY for U.S., Canadian and Mexico Dealers. Export markets located outside of North America must contact their
regional Technical Assistance Center for assistance.
To: Warranty Parts Center

e-mail: [email protected]

or WPC Fax: 248-371-0192

Attn: Amina Winfrey

Part Being Requested: WPC #720 ETA Sensor and Temperature Cam Link

Dealer BAC (U.S.) /Dealer Code (Canada)/Dealer Number (Mexico):

Dealer Name:

Dealer Address:

Dealer Contact Person:

Dealer Phone Number:

Repair Order Number:

Vehicle VIN:

Important: If you do not receive the part within 2 business days after e-mailing or faxing your part request to the Warranty Parts Center,
please call Customer Assistance at 248-371-9901/9902.

Warranty Information
For vehicles repaired under warranty, use:
Labor Operation

Description

Labor Time

4480068*

Replacing the ETA Sensor and Temperature Cam Link

0.4 hr

*This is a unique labor operation for bulletin use only. It will not be published in the Labor Time Guide.

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 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 your GM dealer for information on whether your vehicle may benefit from the information.

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