Subject:    Speedometer System Noise Diagnosis and Repair Model and Year:  1978 - 1980 Corvette - All Vehicles Source:  Chevrolet Service News Page Number:   NA Date:  Part E. , Volume 52-3, May - June... Read More

Subject:  Instrument Cluster Driver Information Center Goes Blank or Analog Speedometer Inaccurate Model and Year: 2015 Chevrolet Corvette Built Prior to Marc 5, 2015 Source: Chevrolet Dealer Service Technical Bulletin Bulletin Number:... Read More

Subject:   Output Shaft Speedo Gear Clip Holes Model and Year:   1982 THM 700-R4 Transmission Source:  Chevrolet Dealer Service Information Bulletin Bulletin No:   82-I-126 Section:   VIIc Date:  ... Read More

Model Year: 1958 Corvette Subject: Corvette Speedometer Driven Gear Source: Chevrolet Service Bulletin Number: 47 Date: April 25, 1958 Zone: #41, Wichita, Kansas Due to an oversight, a duplication of color codes of speedometer... Read More

Model Year: 1974-1975Subject: Stripped Speedometer Driven Gear, 1974-1975 Corvette with 4-Spd. TransmissionSource: Chevrolet Dealer Service Technical BulletinNumber: 75-T-3Date: Jan. 17, 1975TO: ALL CHEVROLET DEALERSOn 1974 and 1975 Corvettes with 4... Read More

From Bob Golden: My name is Bob Golden and my home e-mail is <withheld>.  I wanted you to now how I enjoyed reading your publication on the repairs of the famous digital cluster. For 20 years I was the General manager at Speedometer... Read More

TransmissionGear RatioDrive GearColor# of TeethDriven GearColor# of TeethVehicle Speed Sensor 1984 MD8 with Export (VB4, VD1, VE1, VT7) 3.07 8640517 Red 17 25513047 Black 40 25007308 MD8 except Export (VB4, VD1, VE1, VT7) 3.07 8640517 Red 17... Read More

Subject:  Stripped Speedometer Driven GearModel and Year: 1974 - 1975 Corvette with 4-Speed TransmissionSource: Chevrolet Dealer Service Technical BulletinBulletin No: 75-T-3Section:  XIIDate: January 17, 1975To:  All Chevrolet Dealers... Read More

Subject:  Speedometer Shaft FailureModel and Year: 1969 Corvette  w/ 4-Speed TransmissionDate:  NA UPC XII - ELECTRIC AND INSTRUMENTS E.S.L. SPEEDOMETER SHAFT FAILURE - 1969 Corvette w/ 4-Speed Transmission (#1106) (D.S.T.) The... Read More

#N212330830-01: Service Update Bulletin - Navigation System Displays Incorrect GPS Location - (Jun 21, 2021) Subject:  N212330830 Navigation System Displays Incorrect GPS Location Models:  2021 Cadillac CT4 and CT5 2021 Chevrolet... Read More