Corvette Action Center Knowledgebase

2014 - 2017 Corvette: GM TechLink: Harsh Shift and Rough Idle Conditions

2014 - 2017 Corvette: Harsh Shift and Rough Idle Conditions GM TechLinkOctober 9, 2016 A harsh shift and rough idle may be felt on some 2014 - 2017 Corvette, Silverado, Sierra; 2015-2017 Escalade, Suburban, Tahoe, Yukon; 2016 - 2017 Cadillac CTS-V,... Read More

2015 - 2017 Corvette: GM TechLink: Diagnostic Tips for Harsh Shifting Transmission Conditions

Aug 24, 2017 2015 corvette, 2016 corvette, 2017 corvette, service bulletin, gm techlink, harsh shifting, harsh shift, 8l45, 8l90 automatic transmission 0 0 1456 5/5 (1 Vote)

Diagnostic Tips for Harsh Shifting Transmission Conditions June 10, 2017 Harsh shifting conditions and delayed garage shift engagements may be noticed on some 2017 Colorado, Canyon, Express, Savana; 2016-2017 ATS, CT6, CTS, Camaro; 2015 - 2017... Read More

2015 - 2019 Corvette: Service Bulletin: #16-NA-361: Information on Transmission Harsh 1-2 Shift Upon First Start Up/Shift of the Day Under Light Throttle

Apr 9, 2017 2015 corvette, 2016 corvette, 2017 corvette, service bulletin, transmission, shifting, harsh shift, harsh shifting, 1-2 shift, clutch, 16-NA-361, 2018 corvette, 2019 corvette, c7 corvette 0 0 2517 5/5 (1 Vote)

#16-NA-361: Information on Transmission Harsh 1-2 Shift Upon First Start Up/Shift of the Day Under Light Throttle - (Apr 6, 2017) Subject: Information on Transmission Harsh 1-2 Shift Upon First Start Up/Shift of the Day Under Light Throttle ... Read More

2017 Corvette: Service Bulletin: #16-NA-404: Harsh Shift, Delayed Shift, unwanted Downshift, Transmission Stuck in One Gear, Erratic Shifting, Hesitation or Have a Malfunction Indicator Lamp (MIL) Illuminated

Apr 8, 2017 2017 corvette, service bulletin, 16-NA-404, transmission, harsh shift, delayed shift, unwanted downshift, erratic shifting, hesitation, mil, transmission control module, dtc, dtcs 0 0 1914 2/5 (1 Vote)

#16-NA-404: Harsh Shift, Delayed Shift, unwanted Downshift, Transmission Stuck in One Gear, Erratic Shifting, Hesitation or Have a Malfunction Indicator Lamp (MIL) Illuminated - DTC P0747, P0777, P0797, P2715 or P2724 May Be Set Current or History in... Read More

1992 Corvette: Service Bulletin: Harsh 1-2 Upshift

Jul 29, 2014 1992 corvette, service bulletin, harsh, upshift, 1-2 upshift, 4l60, hydra-matic, transmission, 92-318-7A 0 0 1035 0/5 (0 Vote)

Subject: HARSH 1-2 UPSHIFT INSTALL SERVICE PACKAGE Model and Year: 1992 CAPRICE, CAMARO AND CORVETTE 1992 C/K, G, L/M, S/T TRUCKS Source: Chevrolet Service Bulletin Bulletin Number: 92-318-7A - (09/15/1992) TRANSMISSION APPLICATIONS:... Read More

1996 - 2000 Corvette: Service Bulletin: Harsh 1-2 Upshift, SES, MIL, or CEL Illuminated, DTC P1870 Set

Jul 28, 2014 c4 corvette, c5 corvette, service bulletin, harsh, upshift, ses, mil, cel, illuminated, dtc, p1870, 01-07-30-023B 0 0 1838 5/5 (1 Vote)

Subject: Harsh 1-2 Upshift, SES, MIL, or CEL Illuminated, DTC P1870 Set (Replace Valve Body)Source: Chevrolet Dealer Technical Service BulletinNumber: 01-07-30-023BModels:1996 Buick Roadmaster1996 Cadillac Fleetwood1999-2000 Cadillac Escalade1996... Read More

2018 - 2019 Corvette: GM TechLink: Delayed Transmission Engagement

Oct 1, 2020 2018 corvette, 2019 corvette, clutch, transmission, gm techlink, 8l90, 8l45, delayed engagement, slipping, harsh engagement 0 0 1907 5/5 (1 Vote)

Delayed Transmission Engagement September 30, 2020GM TechLink Some 2018 - 2019 ATS, CTS, CT6, Corvette; 2018 - 2020 Express; 2018 - 2021 Camaro, Colorado, Silverado, Canyon, Savana, Sierra; and 2021 CT4 models equipped with the 8L45 or 8L90 8-speed... Read More

1984 Corvette: Service Bulletin: Ride Harshness - Z51 Suspension

Jul 30, 2014 1984 corvette, service bulletin, ride harshness, z51, suspension, 84-223 0 0 837 0/5 (0 Vote)

Source: Chevrolet Dealer Service BulletinNumber: 84-223Section: 3D (IV)Date: Dec., 1984Subject: Ride Harshness - Z51 SuspensionModel Year: 1984 CorvetteTO: ALL CHEVROLET DEALERSRide harshness associated with the Z-51 suspension option may be a source... Read More

2014 - 2019 Corvette: Service Bulletin: #19-NA-217: Manual Transmission Stalling, Clutch Chatter and/or Hard Shifting into 1st Gear or Reverse; Automatic Transmission Vibration on Launch and/or Engine Noise - (Dec 21, 2020)

Dec 22, 2020 2014 corvette, 2015 corvette, 2016 corvette, 2017 corvette, 2018 corvette, 2019 corvette, c7 corvette, service bulletin, 19-NA-217, 6l80, 8l90, lt1, lt4, transmission stalling, clutch chatter, hard shifting, transmission vibration 0 0 5099 4.67/5 (3 Votes)

#19-NA-217: Manual Transmission Stalling, Clutch Chatter and/or Hard Shifting into 1st Gear or Reverse; Automatic Transmission Vibration on Launch and/or Engine Noise - (Dec 21, 2020) Subject: Manual Transmission Stalling, Clutch Chatter and... Read More

Regarding Product Campaign Bulletin 95-C-16 High Shift Effort into Reverse Gear on Manual Transmission - 1995 Corvettes

Nov 26, 2019 1995 corvette, recall, recall notice, product campaign, 95-c-16, high shift effort, reverse, transmission 0 0 844 0/5 (0 Vote)

"I have a 1995 Chevy corvette that is having this exact issue and my vin is clearly within the parameters of the ones in this article. I have been disputing with GM about honoring this recall and I have been told that they cannot go off of this... Read More

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