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#20-NA-236: Engine Overheats or Coolant Leak Under Rear of Vehicle - (Feb 10, 2021) Subject:  Engine Overheats or Coolant Leak Under Rear of Vehicle Brand: Model: Model Year: VIN: Engine: Transmission: from to from to ... Read More

Release Date:  January 2021 Revision Description: This bulletin has been revised to remove the intake manifold part numbers from the part tables and expand the acceptable evidence to include prior documented complaints of overheating or a track... Read More

GM issued a Service Bulletin extending a special coverage adjustment on the 2015 - 2016 Corvette Z06 equipped with RPO MEK Manual Transmission, and the 2015 - 2018 Corvette Z06 equipped with RPO M5U Automatic Transmission. As outlined below Z06... Read More

This bulletin covers all 1955 Corvettes except the small number of 1955 Corvettes built with V-6 engines. The number of 1955 Corvettes built with V-6 engines is believe to be less than 10 units. With the date of 6/15/56 given in this bulletin, the... Read More

Subject: Engine Overheat Model and Year:   1970 - 1973 Corvettes with 454 Cu. In. Engines and Air Conditioning Source: Chevrolet Dealer Service Technical Bulletin Bulletin Number: 73-T-28, Section VI Date:   May 14, 1973 TO:... Read More

Subject:    Heater and Air Conditioning Model and Year:  1970 Corvette Source:  Chevrolet Service News Page Number:   2 Date:  Section 1A, March 1970, Volume 42, Number 3 The 1970 Corvette heater and air... Read More

This service bulletin was issued in May 1979, but the concepts and techniques are applicable toward 1960's Corvette to early 1980's Corvettes. Subject:    Cooling System Restrictions - Symptoms and Diagnosis Model and Year:   All... Read More

Subject:   Engine Overheat Due to Blocked Coolant Passage in the Cylinder Head Model and Year:   All Small Block V-8 Engines Source:  Chevrolet Dealer Service Technical Bulletin Bulletin No:   74-T-6 Section: ... Read More

Subject:   Heater Hose Routing Change Required Model and Year:   1966 Corvettes with 327 CU. IN. Engine and Air Conditioning Source:  Chevrolet Technical Service Bulletin Bulletin No:   DR #66-10 Section:   Ib... Read More

Subject:   New Heater and Air Condition Control Head Assembly Model and Year:   1986 - 1988 Corvette Coupes Only Source:  Chevrolet Dealer Service Bulletin Bulletin No:   88-230-1A Section:   1A Date: ... Read More