4L65E Solenoid Kit 2006-08, new and ready to install. Fits the 4L65E. Ships fast from the USA.
The 4L65E is the heavy-duty version of the 4L60E that GM put behind the 5.3L and 6.0L V8 in Silverado, Sierra, Tahoe, Suburban, Yukon and Avalanche models. When a 2006, 2007 or 2008 truck with this transmission sets a shift solenoid code, sticks in one gear, starts in 2nd or bangs into gear, the solenoids on the valve body are one of the first things to test. This is a new solenoid kit listed for the 2006-2008 4L65E, with a 1-year warranty, so the electrical side of the valve body can be renewed in one pan-off job.
Gear selection in the 4L65E comes from two on/off shift solenoids, A and B. Transmission Digest's solenoid chart for this family has both on in 1st and both off in 3rd, with the other two combinations giving 2nd and 4th. A pressure control solenoid sets line pressure and therefore shift firmness, and separate solenoids control converter lockup and the 3-2 downshift. They are all fed by the actuator feed limit valve, which Sonnax describes as regulating line pressure down to a steady solenoid feed. On these late trucks the solenoids mount to the GM051 valve body casting, which Sonnax lists for 2003-2008 4L65E and 4L70E units with the late-style pressure control solenoid. That is why a 2006-2008 kit is not the same as a 1990s 4L60E kit.
The 4L65E is rated by GM for 430 lb-ft, and these trucks often tow. Heat is what kills solenoid coils and O-rings, so a truck that has pulled a trailer for 150,000 miles is a prime candidate.
Some of those symptoms also come from a worn valve body or a burnt 3-4 pack, the most common hard-part failure in a towing 4L65E. Our 4L65E common problems guide separates the two.
Measure before you buy. GEARS Magazine gives 20 to 30 ohms as a normal shift solenoid reading, and about 0.42 to 0.63 amps of current at battery voltage. Check each circuit at the case connector, then again at the solenoid with the pan off. If the reading is good at the solenoid but bad at the connector, the problem is the internal harness, not the solenoid. A scan tool that shows the command changing while the gear does not change points to hydraulics. Our 4L65E shift solenoid symptoms guide walks through the test, and the Silverado 1500 shift problems guide covers the truck-specific complaints.
This kit is listed for the 4L65E in 2006-2008 models. Most of those trucks are Silverado and Sierra 1500 and the full-size SUVs with the 5.3L or 6.0L V8. A 4L60E in the same truck looks nearly identical, so check the RPO code on the glovebox or door sticker: M32 is the 4L65E. GM changed solenoid and harness hardware through the production run, and the listing does not break down the individual pieces, so compare your solenoids and connectors with the photos or send us your year and VIN. Other years are on our 4L65E parts page.
If you want the pressure control solenoid by itself as a spare or a test part, the 4L65E pressure control solenoid is listed separately.
| Fits | 4L65E 2006-08 |
| Part type | Solenoid Kit |
| Condition | New |
| 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.
Check the RPO code on the sticker in the glovebox or on the door. M32 is the 4L65E, M30 is the 4L60E. The two look almost the same from under the truck.
Mostly Silverado and Sierra 1500 pickups and the Tahoe, Suburban, Yukon and Avalanche with the 5.3L or 6.0L V8. Confirm with the RPO code or send us your VIN.
Yes. They are on the valve body behind the pan. Drain the fluid, drop the pan and filter, and most solenoids come off without removing the valve body.
Dexron VI. Refill after a new filter and pan gasket, then check the level hot on the dipstick.
Clear the codes and reset the transmission adapts with a scan tool. The computer then relearns shift pressure with the new solenoids instead of compensating for the old ones.
Only if the slip comes from low pressure caused by a bad pressure control solenoid. A burnt 3-4 clutch pack or worn valve body bores need hard-part repairs.
