Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2010TRAVERSE AWD V6-3.6LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTRANSMISSION CONTROL SYSTEMSRELAYS AND MODULES - TRANSMISSION AND DRIVETRAINTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSA/T CONTROLS - DOWNSHIFT HESITATION/DELAYED SHIFTING
2010 Chevrolet Traverse AWD V6-3.6L
A/T Controls - Downshift Hesitation/Delayed Shifting
2010 Chevrolet Traverse AWD V6-3.6LSECTION A/T Controls - Downshift Hesitation/Delayed Shifting
TECHNICAL
Bulletin No.: 09-07-30-016A
Date: November 25, 2009
Subject: Transmission Hesitation, Delayed Shifting, Shifting at Wrong Time (Reprogram TCM)
Models:
2010 Buick Enclave
2010 Chevrolet Equinox, Traverse
2010 GMC Acadia, Terrain
2010 Saturn OUTLOOK
Equipped with 6T40/45 (RPOs MH7, MHC) or 6T70/75 (RPOs MH2, MH4, MY9, MH6) Automatic Transmission
2010 Buick LaCrosse
Equipped with 3.0L (RPO LF1) Engine and 6T70 (RPOs MH2, MH4) Automatic Transmission
2010 Chevrolet Malibu
2010 Pontiac G6
2010 Saturn AURA
Equipped with 6T40 (RPO MH8) Automatic Transmission
All Vehicles Built Prior to the Following VIN Breakpoints:
Supercede:
This bulletin is being revised to add models. Please discard Corporate Bulletin Number 09-07-30-016 (07- Transmission/Transaxle).
Condition
Some customers may comment on transmission downshift hesitation, delayed shifting and shifting at the wrong time.
Correction
A revised transmission calibration has been developed to address these issues. Reprogram the transmission control module (TCM) with updated calibration files using the TIS2WEB Service Programming System (SPS) application. Select SEQ Programming Sequence ECM/TCM from the Supported Controllers screen. Refer to SI and Service Programming System (SPS) documentation for programming instructions, if required.
Warranty Information
For vehicles repaired under warranty, use the table above.
Disclaimer
Bulletin No.: 09-07-30-016A
Date: November 25, 2009
Subject: Transmission Hesitation, Delayed Shifting, Shifting at Wrong Time (Reprogram TCM)
Models:
2010 Buick Enclave
2010 Chevrolet Equinox, Traverse
2010 GMC Acadia, Terrain
2010 Saturn OUTLOOK
Equipped with 6T40/45 (RPOs MH7, MHC) or 6T70/75 (RPOs MH2, MH4, MY9, MH6) Automatic Transmission
2010 Buick LaCrosse
Equipped with 3.0L (RPO LF1) Engine and 6T70 (RPOs MH2, MH4) Automatic Transmission
2010 Chevrolet Malibu
2010 Pontiac G6
2010 Saturn AURA
Equipped with 6T40 (RPO MH8) Automatic Transmission
All Vehicles Built Prior to the Following VIN Breakpoints:
Supercede:
This bulletin is being revised to add models. Please discard Corporate Bulletin Number 09-07-30-016 (07- Transmission/Transaxle).
Condition
Some customers may comment on transmission downshift hesitation, delayed shifting and shifting at the wrong time.
Correction
A revised transmission calibration has been developed to address these issues. Reprogram the transmission control module (TCM) with updated calibration files using the TIS2WEB Service Programming System (SPS) application. Select SEQ Programming Sequence ECM/TCM from the Supported Controllers screen. Refer to SI and Service Programming System (SPS) documentation for programming instructions, if required.
Warranty Information
For vehicles repaired under warranty, use the table above.
Disclaimer
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.