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Subject: Vacuum Modulation System InspectionModel and Year: 1958-1959 Powerglide and 1957 Thru 1959 Turboglide TransmissionsSource: Chevrolet Technical Service BulletinBulletin Number: DR #411, Section VIIDate: July 22, 1959 TO:  ALL CHEVROLET... Read More

Subject: HIGH, ROUGH, UNSTABLE IDLE VACUUM LEAK Model and Year: 1982-83 CAMARO, 1982-84 CORVETTESource: Chevrolet Service BulletinBulletin Number: 84-30 - (11/11/1983) High, rough, or unstable idle condition may be caused by vacuum leaks by the TBI... Read More

Subject: Product Campaign: Distributor Vacuum Vent HarnessModel and Year: 1995 Chevrolet CorvetteSource: Chevrolet Dealer CampaignBulletin Number: 95-C-38To: All Chevrolet/Geo DealersGeneral Motors has decided that certain 1995 Chevrolet Corvettes... Read More

LT5 Secondary Port Operation & Vacuum Diagnosis by Robert Loszewski Copyright 2001 Before getting into diagnosing the LT5 engine's secondary port vacuum system, I thought it would be a good idea to take this opportunity to clear up a few... Read More

By John HinckleyUsed here with permission.Copyright John HinckleyIn this day and age, when modern automotive powertrains are computer-controlled and engines don’t even HAVE distributors any more, the knowledge of what distributors did and how... Read More

#20-NA-179: Malfunction Indicator Lamp (MIL) Illuminated - DTCs P0521 and/or P06DD Set - (Oct 23, 2020) Subject:  Malfunction Indicator Lamp (MIL) Illuminated – DTCs P0521 and/or P06DD Set Brand: Model: Model Year: VIN... Read More

Subject:     Air Ventilator Control Cables Model and Year: 1965 Corvette Source: Chevrolet Service Bulletin - #41, Wichita, Kansas Zone Bulletin Number: 9 Date:   April 7, 1965 On early production Corvettes,... Read More

Subject:    Fuel Tank Pressure Control Valve Model and Year:  1986 Chevrolet Corvette w/ 5.7L Engine (RPO L98) (California Emission Control Vehicles Only) Source:   Product Campaign / Dealer Emission Campaign Bulletin ... Read More

Subject:   Upshift at Part Throttle Model and Year:   1955 6-Cylinder Powerglide Source:  Chevrolet Technical Service Bulletin Bulletin No:   DR - 192 Section:   VII Date:    January 31,... Read More

#PIT5817A: SES MIL / Dead Battery / DTC P0700 P2535 U300D - (Mar 8, 2021) Subject:  SES MIL / Dead Battery / DTC P0700 P2535 U300D Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Buick Envision ... Read More