Product Description
Fits: 6L80, 6L90
OE part no.: 24256939, 24257213, 24259639, 24259835, 24261870, 24264141, 24265053, 24265259, 24267576, 24270598, 24275873, 24276637, 24294925
Typically fits Cadillac 2012–2015, Chevrolet 2011–2020, GMC 2011–2020, Isuzu 2012–2016.
The GM 6L80 and 6L90 TEHCM houses the transmission control module (TCM), or computer. The eight solenoids are connected to the TCM via a lead frame, all of which are over-molded in the plastic housing and not accessible or serviceable separately. Component fails and circuit faults in the TEHCM are common, and result in drivability complaints and trouble codes which can only be remedied with a replacement unit.
Sonnax remanufactured TEHCM GM6L-TEHCM-C6 delivers durable, reliable OE performance at a significant savings over an OE replacement. Each unit goes through a rigorous cleaning and inspection process where all failed components are replaced. Electro-hydraulic testing in a simulated drive test ensures full functional performance consistent with a new OE TEHCM. A vehicle VIN remains on the Sonnax remanufactured TEHCM, and will be overwritten by the transmission shop technician with the new vehicle VIN during the reprogramming process. After installation, this remanufactured TEHCM must be reprogrammed on the vehicle using a J2534 device in order to function correctly.
The fully tested TEHCM is serialized, and the test data stored and packaged in mylar bag with a protective connector cover to prevent inadvertent static discharge issues during the shipping, handling and receiving processes.
- Ultrasonically cleaned and thorough flushing of solenoids to remove all dirt and debris — no matter how hidden
- New pressure switches installed
- New filter plate/screen included
- Fully electro-hydraulically tested to comply with OE performance
- Must be reprogrammed after installation using a J2534 device for proper function
Notes
Sonnax TEHCMs have "Sonnax" lasered on the TCM cover for quality assurance purposes. Sonnax TEHCMs are serialized with a unique number, and the data from each TEHCM during its final testing is stored for future review. Please log your serial numbers as this will help with any diagnostic questions you may have. See web image for reference.
Symptoms
- Solenoid electrical circuit faults
- Solenoid performance codes
- Gear ratio codes
- Poor shift quality
- TCC codes
- Internal memory codes
- Temperature sensor codes
Cause
Internal component failure or circuit faults within the TEHCM creates no or poor communication with the onboard TCM, resulting in poor shift quality and numerous diagnostic trouble codes.
Correction
Install a remanufactured Sonnax TEHCM that has been thoroughly cleaned and updated with new components where necessary and electro-hydraulically tested for OE performance in a simulated drive test.
Contents
- Remanufactured TEHCM
- Filter Screen
Valve Body Layout
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
GM 6L45, 6L50, 6L80, 6L90 Valve Body Layout
Installation instructions (PDF)
Core Charge
Core charge: $200, already included in the price. The price of this part includes a $200 refundable core charge. When your new part arrives, contact us and we will send you return instructions for your old one; we refund the $200 once the core is received and checked.
- Ship the core back within 30 days of delivery for the full refund. Cores shipped 31 to 90 days after delivery get 70% of the core charge back. After 90 days, the core charge is not refunded.
- The core must be the same part as the one you bought, complete, and not damaged, opened or taken apart.
- Pack it securely and put your order number in the box.
- We refund the core charge to your original payment method within 5 business days of receiving it.
Contact us before shipping if your core is damaged.
