Slip Or Shudder During A Launch In First Second Third Or Fourth Gears Delayed Engagement Into Drive Clunk Or Bump During The 1-2 Shift – 2013-2021 Cadillac Chevrolet GMC

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Bulletin No.: PIP5175E Published date: N/A Preliminary Information PIP5175E Slip Or Shudder During A Launch In First Second Third Or Fourth Gears Delayed Engagement Into Drive Clunk Or Bump During The 1-2 Shift Models Brand: Cadillac Chevrolet Chevrolet Escalade Avalanche Caprice PPV Model: Model Years: 2013 – 2020 2013 2013 – 2017 VIN: from to All All All All All All Engine: All All All Transmissions: 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 Chevrolet Chevrolet Chevrolet Chevrolet Chevrolet Chevrolet Chevrolet Chevrolet Chevrolet GMC GMC GMC GMC GMC Cheyenne/Silverado Cheyenne/Silverado 2wd LTD (RPO J21, VIN Digit 5 = W) Cheyenne/Silverado 2WD New (RPO J22, VIN Digit 5 = A) Cheyenne/Silverado 4WD LTD (RPO J21, VIN Digit 5 = Y Cheyenne/Silverado 4WD New (RPO J22, VIN Digit 5 = D) Colorado SS Suburban Tahoe Canyon Sierra Sierra 2WD Limited RPO J21, VIN Digit 5 = 8) Sierra 2WD New (RPO J22, VIN Digit 5 = H) Sierra 4WD Limited (RPO J21, VIN Digit 5 = 9) 2013 – 2021 2019 – 2022 2019 – 2021 2019 – 2021 2019 – 2021 2014 – 2022 2014 – 2017 2013 – 2020 2013 – 2020 2015 – 2022 2013 – 2021 2019 – 2021 2019 – 2021 2019 – 2021 All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All All 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 MYB 6L50 Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 MYB 6L50 Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 Brand: GMC GMC Model: Sierra 4WD New (RPO J22, VIN Digit 5 = U) Yukon Models Model Years: 2019 – 2021 2013 – 2020 VIN: from to All All All All Engine: All All Transmissions: 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 6L80 MYC Automatic Transmission Built in the Silao Mexico Plant 2 Note: Please refer to SI document 2610129. The following information only applies to transmissions with a source code (item number 7 in document 2610129) of (2). Supersession Statement: This PI was superseded to add the MYB 6L60 and model years. Please discard PIP5175D. Condition / Concern Customers may comment on a delayed engagement into drive, shudder at a launch, or the transmission is slipping when shifting into 1st, 2nd, 3rd or 4th gears. The customer may also comment that they feel a bump or hear a clunk noise during a 1-2 shift. These concerns may only be present when the transmission is at operating temperature. Recommendations / Instructions These concerns may be due to loose stator support to pump cover bolts causing a leak at the stator support to pump cover gasket. If the root cause cannot be found following normal SI diagnostics, remove the transmission fluid pan and the transmission control assemblies. Referring to the picture below and wearing proper eye protection apply compressed air to the 1-2-3-4 clutch apply passage and inspect for air leaking out of the compensator feed passage in the pump cover. If no leakage is found out of the compensator feed passage listen for excessive air leakage inside the transmission. Callout 1 Component Name: Applying compressed air to the 1234 clutch passage. Callout 2 Component Name: Compensator feed passage. You may also notice fluid leaking or see a misaligned gasket by looking up through the case opening between the pump stator support and the 1234/35R clutch housing during this test as shown below. Callout 2 Component Name: Gap between the pump cover and the 1234/35R clutch housing. If excessive air leakage is found inspect the transmission fluid pump for loose stator support to pump cover bolts or a misaligned stator support to pump cover gasket. Note: The bolts should never be checked for being loose by using a hand tool. The bolts are supposed to be torqued at the factory and never loosened. The recommended procedure to check for loose bolts is to use your fingers or just a socket and your fingers and attempt to rotate the bolts in a counter clockwise direction. If the bolts are loose for any reason the pump cover must be replaced. Refer to the picture below. Callout 1 Component Name: Misaligned Gasket Callout 2 Component Name: Stator Support Bolts If any of the bolts are loose or the gasket is misaligned or leaking, the transmission pump cover must be replaced and the 1234 clutch plates should be inspected for being distressed and repaired as needed. Note: The transmission adapts must be reset if the pump cover is replaced to address this concern. This PI will update to a bulletin in the future Parts Information Part Number Description QTY 24248573 COVER KIT,A/TRNS FLUID PUMP 1 24224147 PLATE ASM-1-2-3-4 CLU 6 24258080 PLATE,1-2-3-4 CLU(STEEL) 5 Warranty Information For vehicles repaired under the Powertrain coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. Labor Operation Description Labor Time 8465050 (Use if no concerns are found with the stator support bolts or cover). 8466410 (Use if the stator support bolts are loose or the gasket is misaligned) Oil Pump Replacement 1-2-3-4 Clutch Plate Replacement Use Published Labor Operation Time Use Published Labor Operation Time Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. © 2022 General Motors. All Rights Reserved.

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