4L65E Solenoid Kit 2006-2007, remanufactured and ready to install. Fits the 4L65E. Ships fast from the USA.
A 2006 or 2007 Silverado, Sierra, Tahoe, Yukon, Suburban or Avalanche with the 5.3L or 6.0L and the 4L65E four-speed can start setting solenoid performance codes, bang into gear, or start off in the wrong gear once the valve body electrics wear. This remanufactured solenoid kit is listed for the 2006-2007 4L65E and carries a 1-year warranty. The pictured kit is the complete electrical package: internal harness and case connector, pressure switch manifold, the two shift solenoids, the pressure control solenoid, the converter clutch solenoid and the 3-2 control solenoid. Remanufactured means it is a returned-to-service unit rather than new, which keeps the price below a new kit for the same job.
None of these solenoids work on line pressure directly. Sonnax explains that the actuator feed limit (AFL) valve takes line pressure and regulates it down to a steady solenoid feed, typically in the 80 to 115 psi range. The shift solenoids use that feed to stroke the shift valves, the pressure control solenoid turns it into a signal that sets line pressure, and the converter clutch solenoid uses it to apply lockup. On the 2003-2008 valve body casting that these years use, Sonnax lists a late-style pressure control solenoid, so a 2006-2007 kit is built around that later part rather than the early version.
The trap on this transmission is the feed oil. Sonnax points out that a worn AFL valve bore can supply the solenoids with feed that is too high or too low and make a perfectly good solenoid look failed, causing the same performance codes, wrong-gear starts, harsh or soft shifts and lockup complaints. So test both sides. Electrically, measure each solenoid circuit at the case connector and at the solenoid. Hydraulically, check line pressure against spec, and if the valve body comes off, have the AFL bore vacuum tested. If the electrical side fails, this kit is the repair. If the bore is worn, new solenoids alone will not cure it. Our 4L65E common problems guide covers valve body wear and 3-4 clutch failure, and the Tahoe common problems guide covers SUV-specific complaints.
This kit is listed for 2006 and 2007 4L65E units. 2007 was a changeover year for GM's full-size trucks, and the lighter 4L60E was used in many of the same models, so do not go by model year alone. Find RPO M32 on the glovebox service parts sticker to confirm a 4L65E, then compare the harness connector and solenoids with the product photo. If anything looks different, send us your year and VIN before ordering. For a 2008 truck, the 2006-2008 4L65E solenoid kit extends coverage, and the full range is on our 4L65E parts page.
After a converter or full transmission replacement, GM preliminary information PIP5340A describes harsh 1-2 shifts with P0894 or P1870 on listed 4L65E (M32) vehicles, so follow the adapt reset and relearn steps rather than assuming a new part is bad. If you only need the lockup side, the 4L65E TCC solenoid is sold separately, and a 4L65E shift kit installed with the pan off restores firmer shifts on a worn unit.
| Fits | 4L65E 2006-2007 |
| 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.
It is a returned-to-service kit rather than new. It is covered by a 1-year warranty.
Look for RPO M32 on the service parts sticker in the glovebox. M30 is the 4L60E.
Yes. Sonnax notes that a worn AFL valve bore feeds the solenoids the wrong pressure and makes good solenoids look failed. Test line pressure and the valve body as well.
The pictured kit includes the internal harness with the case connector, the pressure switch manifold and the valve body solenoids.
Dexron VI with a new filter, level checked hot, then clear codes and reset shift adapts with a scan tool.
GM's PIP5340A lists P0894 and P1870 with harsh 1-2 shifts after converter or transmission replacement on some 4L65E vehicles. Follow the relearn procedure first.
