4T65E Solenoid Kit 2003, new and ready to install. Fits the 4T65E. Ships fast from the USA.
A 2003 Chevrolet Impala or Monte Carlo, Pontiac Grand Prix, Buick LeSabre or Century with the 4T65E that flares on the 1-2 or 2-3, stores P1811 for long shift time, slips the converter clutch, or drops into limp mode usually has a solenoid or pressure-feed problem in the valve body. This is a new 2003-application 4T65E solenoid kit. The listing photo shows two open-coil shift solenoids, two spool-type pressure solenoids and a flat connector piece, giving you the electrical parts of the valve body in one order.
On the 4T65E the computer picks each gear by switching the 1-2 and 2-3 shift solenoids on and off, while a pulse-width-modulated pressure control solenoid sets line pressure and a separate solenoid controls converter clutch apply. All of them are fed by the actuator feed limit (AFL) valve in the channel plate, which Sonnax rates at a 115 psi maximum. That matters for diagnosis: if the AFL bore wears, every solenoid gets weak oil and the car behaves as if the solenoids themselves have failed.
Transmission Digest explains that P1811 sets when the computer sees shift times beyond its adapt limit, and that worn 2nd and 3rd clutch packs cause the same code. A solenoid kit will not cure a burnt clutch pack.
Read the codes and the shift adapt values with a scan tool. Measure each solenoid's resistance at the case connector, then at the solenoid, to rule out the harness. If the solenoids test good but line pressure is low and adapts are maxed, suspect the AFL valve bore in the channel plate. Our 4T65E shift solenoid guide and pressure control solenoid guide walk through both checks step by step.
This kit is listed for the 2003 model year 4T65E. GM revised this transaxle's valve body for 2003, which is why we list 2003-up valve bodies separately, and the solenoid kits are split by year for the same reason. Compare connector shapes and solenoid styles to the photo, or send your year and VIN before ordering. A 1997-2002 solenoid kit is listed for earlier cars, and the full range is in the 4T65E parts collection.
The solenoids live on the valve body behind the side cover, so plan on draining fluid and supporting the engine-side components as your car requires. Check every pin in the case connector and the internal harness for chafing; Transmission Digest documents harness chafe at a retaining clip causing TCC circuit codes on later 4T65E cars. Use new O-rings, refill with Dexron VI (GM lists about 7.4 quarts total capacity on the Impala, with less needed for a pan-only service), clear codes and let the computer relearn. If your valve body bores are worn, pair this kit with a 2003 4T65E valve body; for a full rebuild, the 2003 master rebuild kit covers seals and frictions.
| Fits | 4T65E 2003 |
| 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.
It is listed for 2003. GM revised the valve body for 2003, so a 2002 car should use the 1997-2002 kit. Send your year and VIN if you are unsure.
Only if a solenoid is the cause. P1811 also sets from a worn AFL valve bore or worn 2nd and 3rd clutch packs, so check line pressure and adapts first.
Dexron VI ATF. GM lists about 7.4 quarts total capacity on the Impala; a pan drain takes much less, so fill and check the level hot.
The listing photo shows two open-coil shift solenoids, two spool-type pressure solenoids and a flat connector piece. Match them to your originals before installing.
Yes. Clear codes and reset adapts with a scan tool if you have one, then drive through normal shifts so the computer relearns shift timing.
