6T75 Solenoid Kit 2008, remanufactured and ready to install. Fits the 6T75. Ships fast from the USA.
A 2008 6T75 is one of the earliest heavy-duty six-speed transaxles GM built, and it went into the first wave of Lambda crossovers: the GMC Acadia, Saturn Outlook and Buick Enclave. Owners of these vehicles who are now looking at a scan tool full of pressure switch codes, a check engine light and a crossover stuck in one gear are usually facing a worn control assembly. This listing is the remanufactured first-generation TEHCM for that 2008 build - the solenoid body with its eight solenoids, four pressure switches and the integrated transmission control module, sold as one tested unit.
The early assembly is more than a set of solenoids. Alongside the pressure control and shift solenoids, it carries normally closed pressure switches that report back to the module whether a clutch circuit actually filled when it was told to. That feedback loop is how the 2008 TCM protects the heavy-duty clutches: when a switch reading disagrees with the command, the module assumes a hydraulic problem, logs a code and drops to a default gear. GM removed those switches from the second-generation design, so the failures they cause are specific to early units like this one. The 6T75's heavier carriers, transfer gear and ribbed case let it tow 4,500 lb, and towing heat is exactly what ages these switch seals and solenoid coils.
On a 2008 it is especially important to rule out the internal failures first. ATRA notes that the no reverse, third or fifth condition, with codes such as P0776, P2723 or P2715, mainly affects transmissions built before the 2010 model year, and GM bulletin 09-07-30-012F ties P0776 to a broken 3-5-Reverse wave plate. ATRA also gives a quick check: unplug the transmission and see whether reverse engages. If it does, the reverse problem is electrical, and this assembly is a likely suspect. If it still has no reverse unplugged, the fault is inside the case. Our Acadia common problems guide covers the wave plate and the pressure switch failures side by side, and the shift solenoid guide explains which solenoid controls which clutch.
This assembly is for 2008 6T75 applications, all of which are first generation. It is not interchangeable with a 2013-or-later second-generation module; Sonnax states that a Gen 2 TEHCM will not work properly in a Gen 1 build. Previous repairs sometimes put the wrong module in, so do not rely only on the number printed on the one you remove. Check the transmission RPO code on the Service Parts Identification label in the glove box - ATRA lists MH6 and MY9 for the 6T75 - and send it with your VIN so we can confirm the match before shipping. For later years, see the 2008-2017 6T75 solenoid kit or browse the full 6T70 and 6T75 parts collection.
If the wave plate has already failed, the transmission is coming apart anyway, and a 2007-2012 6T75 overhaul kit covers the seals and frictions for a first-generation rebuild.
| Fits | 6T75 2008 |
| Part type | Solenoid Kit |
| Condition | Remanufactured |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Every 2008 6T75 is first generation, with four pressure switches inside the control assembly. Second-generation assemblies from 2013 on do not have them and will not work properly in a 2008.
Try ATRA's quick check: unplug the transmission and select reverse. If reverse engages, the problem is electrical and this assembly is a likely cause. If not, look at the 3-5-Reverse wave plate described in GM bulletin 09-07-30-012F.
P0752, P0872, P0877 and P0989 mean the module saw a pressure switch state that did not match its command. A bad switch, a leaking seal or low circuit pressure can all cause it, so confirm with a line pressure test.
Yes. It must be programmed to your VIN with a J2534 pass-thru device or dealer tool, followed by the Service Fast Learn adapt procedure.
The early Lambda crossovers, including the GMC Acadia, Saturn Outlook and Buick Enclave. Send your VIN and RPO code and we will confirm your transmission.
