PIE0538
Service Bulletin Details
Public Details for: PIE0538
This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to 8 speed transmission shift quality.
- 2020 -
Models from 2020
2020 CADILLAC CT4 |
2020 CADILLAC CT5 |
2020 CHEVROLET COLORADO |
2020 CHEVROLET EXPRESS |
2020 CHEVROLET SILVERADO 1500 |
2020 GMC CANYON |
2020 GMC SAVANA |
2020 GMC SIERRA 1500 |
Subject: Engineering Information – 8 Speed Transmission Shift Quality Attention: Proceed with this EI ONLY if the customer has commented about this concern AND the PIE number is listed in the Global Warranty Management / Investigate History link (GWM/IVH). If the customer has not commented about this condition or the EI does not show in GWM/IVH, disregard the PI and proceed with diagnostics found in published service information. THIS IS NOT A RECALL — refer to Service Bulletin 04-00-89-053 for more details on the use of Engineering Information bulletins. Brand: Cadillac Model: CT4 Model Year: VIN: from to from to 2020 2020 - - CT5 Chevrolet Camaro Transmission: - Equipped with Automatic Transmission (RPO M5N) Equipped with Automatic Transmission (RPO M5T) Colorado GMC Engine: Express Equipped with Automatic Transmission (RPOs M5U, MQD) Silverado Equipped with Automatic Transmission (RPO MQE) Canyon Equipped with Automatic Transmission (RPO M5T) Savana Equipped with Automatic Transmission (RPOs M5U, MQD) Sierra Equipped with Automatic Transmission (RPO MQE) Involved Region or Country North America 1 Important: If the customer did not bring their vehicle in for this concern, DO NOT proceed with this EI. Condition Some customer may comment of one or more of the following transmission symptoms: – Harsh Garage Shift (Park to Reverse, Reverse to Drive, Drive to Reverse) – Delayed or Slow to Engage into Drive or Reverse – Harsh/Hard/Firm Upshift and/or Downshift – Slip/Flare Upshift or Downshift GM Engineering is attempting to determine the root cause of the above condition. Engineering has a need to gather information on vehicles PRIOR to repair that may exhibit this condition. As a result, this information will be used to "root cause" the customer's concern and develop/validate a field fix. Cause Correction If you encounter a vehicle with the above concern, perform the following steps and establish a DCM PQC case before contacting the engineers listed below with your findings. 1. Was the vehicle driven or towed into the dealership? 2. What is the current mileage? 3. What valve body part number is being requested? (Refer to the EPC for obtaining the correct valve body P/N#) 4. Why is the valve body being requested? 5. Does the vehicle have any non-production modifications? (Include all modifications not just powertrain related items) 6. Is the vehicle for personal or commercial use? 6.1. 7. If commercial what is the vehicle use? Are there any DTC’s current or history? Important: Note all DTC’s in all modules DO NOT clear any DTC’s prior to contacting engineering. 8. 9. What is the customers concern? (Describe in detail 1-2 shift, 2-3 shift, 3-2 downshift, 2-1 downshift, garage shift harsh, garage shift delayed, etc.) 8.1. Can the customer concern be duplicated? 8.2. Is the condition repeatable or intermittent? 8.3. How long has the condition been present with the vehicle? (since new, or is this a new concern). 8.4. Does the condition occur (hot, cold, accelerate, decelerate, power down, lift foot etc.)? 8.5. At what speed does the condition occur? If shift quality related use GDS to determine which shift is suspect? 9.1. Which shift(s) are suspect? 9.2. What is the throttle angle? 9.3. What is the vehicle speed? 10. Is the transmission fluid at the proper level? 10.1. Does the fluid appear to be discolored? 10.2. If the pan has been removed is there debris/sediment in the pan? 11. Does the ECM and TCM have the latest software calibrations? (DO NOT update any calibrations prior to reviewing with engineering) 12. Has the transmission electrical connector (X175) been inspected for being properly connected/seated and routed properly? 13. Are there any transmission fluid leaks? If yes note the location. 14. Are there any noises related to the condition? 14.1. What type of noise. 14.2. What is the source of the noise? 15. What diagnosis has been completed to this point? 15.1. What Service Information (SI) document(s) have been used? 15.2. Have there been any previous repairs to the vehicle? Contact Information Engineer Name Phone Number 2 Mike Bunch 248-860-0053 Justin Register 586-212-6027 Please include the following information if leaving a message: – Technician name (First & Last) – Dealer name and phone number – Complete VIN and repair order (R.O) number – Requested Restricted Part number On the repair order, document the date and time the call was placed (even if the engineer was not reached). If engineering is unable to return the call within one hour, proceed with diagnosis and repair based on information found in SI. Warranty Information If engineer was contacted or required information was provided, use: Labor Operation Description Labor Time 8480888* Engineering Information – 8 Speed Transmission Shift Quality 0.5 hr * This is a unique labor operation for bulletin use only. Version 1 Modified Released September 20, 2019 3