#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

#17098: Service Update - 8-Speed Transmission Check Engine Light - (Mar 23, 2017) Subject:  17098 – 8-Speed Transmission Check Engine Light Models:  2017 Cadillac ATS, CTS, CT6, Escalade, Escalade ESV 2017 Chevrolet Camaro,... Read More

Subject:   Reprogramming Procedures for the 8L90 8-Speed Transmission Model and Year:    2015 Corvette, Silverado, Sierra, Yukon, Yukon XL, and Escalade Source:  GM TechLink Page Number:   NA Date: ... Read More

Subject: Corvette Active Handling Model and Year: 1998 Corvette with RPO JL-4 Source: Chevrolet Pro Service News Page Number:   1 Date:  April 1998 - Volume 7, Number 4 Read More

Code #12: No Distributor Reference Pulse. Code #13: Oxygen Sensor Circuit.Code #14: Shorted Coolant Sensor Circuit.Code #15: Open Coolant Sensor Circuit.Code #21: Throttle Position Sensor Circuit.Code #23: Mixture Control Solenoid Circuit.Code #24:... Read More

Subject: DAMAGED ECM/PCM AND/OR MIS-DIAGNOSED ECM/PCM SYMPTOMS DUE TO INCORRECT "TAP-TESTING" PROCEDURESModel and Year:1982-91 ALL PASSENGER CARS AND TRUCKSSource: Chevrolet Service BulletinBulletin Number: 91-384-6E - (07/24/1991) CONDITION: Because... Read More

Code #12:  Normal System No Codes.Code #13:  Oxygen Sensor Circuit.Code #14:  Coolant Sensor Circuit Low.Code #15:  Coolant Sensor Circuit High.Code #21:  Throttle Position Sensor High.Code #22:  Throttle Position Sensor... Read More

Subject: 3 - 2 Downshift Flare (Reflash Control Module)Model and Year: 1995 CHEVROLET CORVETTE WITH 4L60-E TRANSMISSION (RPO M30) AND 3.07 REAR AXLE RATIO BUILT BEFORE VIN BREAKPOINT 105682Source: Chevrolet Dealer Service BulletinBulletin Number: 57... Read More

Subject: Starter Clicks, Engine Doesn't Start (Replace CCM)Model and Year: 1995 Chevrolet Corvette Prior to Vin Breakpoint S5110803Source: Chevrolet Dealer Service BulletinBulletin Number: 53-64-02CONDITION:THE STARTER WILL CLICK, BUT THE ENGINE WILL... Read More

You won't find that GM discontinued part (discontinued in 1999) unless it's from someone parting-out or willing to sell a part of an assembly.SECRET:Try a non-ZR1 panel and retrofit it by drilling holes to attach a ZR1's control modules/relays... Read More