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Automatic Temperature Control (ATC): Notes

CAUTION: Automatic Temperature Control (ATC) Modules in 2003 RS/RG vehicles use version 13 and OF software. ATC Modules in 2004 RS/RG vehicles use version 0313 and 0428 software. Do NOT install an ATC Module with version 13 or OF software in a 2004 RS/RG vehicle. Do NOT install an ATC Module with version 0313 or 0428 software in a 2003 RS/RG vehicle. Use the DRBIII® to verify which version software the ATC Module is using by selecting Body Systems, Automatic Temperature Control, and then selecting Module Display. Failure to follow these instructions can result in either improper or failed HVAC system operation.
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