Subject:   Loss of Heating or Cooling Control Model and Year:   1990 Y Car with Electronic Air Conditioning (C68) Option Source:  Chevrolet Dealer Service Bulletin Bulletin No:   90-101-1A (Corporate Bulletin No:... Read More

Subject:   Lack of Heat with Controls in Full "On" Position Model and Year:   1964 Corvette with Air Conditioning Source:  Chevrolet Technical Service Bulletin Bulletin No:  TSB #1012 Section:   I Date... Read More

Subject: Refrigerant Leaks Air Conditioning Compressor Superheat Switch Model and Year: 1972 Passenger Models Except Vega Source: Chevrolet Service News Page Number: Page 1 Date: November 1972, Volume 44, Number 11 Investigation of... Read More

Subject: Air Flow Heater ProblemsModel and Year: 1954 (and 1953?) Chevrolet Passenger CarsSource: Zone Letter - Louisville, KYBulletin Number: Z0-22-34, Feb. 17th, 1954 TO CHEVROLET DEALERS: Gentlemen:- We have had a few complaints from Chevrolet... Read More

Subject: Overheating at IdleModel and Year: 1966 Corvettes Equipped with 427 - 390 HP (RPO L36) with Factory Air Conditioning (RPO C60) Source: Service Update - Chevrolet Engineering Service LetterNumber: TNP #66-1Date: November 16, 1965... Read More

On 1990 to 1996 Corvettes equipped with RPO C68 (electronic climate control), it is possible to read the HVAC system diagnostic codes from the climate control panel on the dashboard. To enter the diagnostic mode, press the fan up and down arrow... Read More

Subject: Heater Hose Clamp Interference with A/C Evaporator Inlet Pipe Model and Year: 1976 Corvette with A/C Source: Chevrolet Dealer Service Technical Bulletin Bulletin Number: 76-T-43, Section Ia Date: Nov. 1976 TO:  ALL... Read More

Subject: Loss of Heating or Cooling Control - New ProgrammerModel and Year: 1990 CORVETTESource: Chevrolet Service BulletinBulletin Number: 90-378-1A - (10/25/1990)TO: ALL CHEVROLET DEALERSCondition:The customer may comment on a loss of heating or... Read More

Subject: LOSS OF HEAT/COOLING CONTROL REVISED PROGRAMER AVAILABLE Model and Year:1991 CORVETTE WITH 5.7L ENGINESource: Chevrolet Service BulletinBulletin Number: 91-200-1A - (02/04/1991) Condition: On some vehicles the temperature of air coming from... Read More

Subject: HVAC Controls Intermittently Inoperative or Improperly Responding (Reset HVAC Controller)Source: Chevrolet Dealer Technical Service BulletinNumber:  #03-01-39-004 - (04/14/2003)Models: 1997-2003 Chevrolet Corvette Condition: Some... Read More