4T65E Pressure Control Solenoid 1997-2002, new and ready to install. Fits the 4T65E. Ships fast from the USA.
Most people land on this page because a 1997-2002 Pontiac Grand Prix, Buick Century, Regal, LeSabre or Park Avenue, Oldsmobile Intrigue, or 2000-2002 Chevrolet Impala or Monte Carlo has started slipping into gear, flaring on the 2-3 upshift, or banging into drive, and the scan tool points at line pressure. The pressure control solenoid is the usual suspect. This listing goes further than the solenoid alone: it ships as a new master set for the early 4T65E, with the pressure control solenoid, the converter clutch (lockup) solenoid and both shift solenoids, plus the pressure switch plate shown in the photo. Since all of these live on the same valve body behind the side cover, one trip in replaces every electrical part that can cause a pressure or shift complaint.
The 4T65E was GM's 1997 electronic successor to the 4T60-E, and its computer sets line pressure by pulsing the pressure control solenoid rather than relying on a throttle cable. More current to the solenoid lowers pressure, less current raises it, so the computer can soften light-throttle shifts and firm up shifts under load. When the solenoid's internal screen clogs or its coil weakens, pressure no longer follows the command: clutches apply slowly and slip, or the unit sits at maximum pressure and every engagement is harsh. The two shift solenoids select first through fourth, and the lockup solenoid applies the converter clutch, so a tired set often produces a mix of all three complaints.
P1811 is not always a solenoid. Transmission Digest traces many cases to excess clearance in the 2nd and 3rd clutch packs, and no solenoid will cure burnt clutches.
Read codes first, then watch commanded versus actual pressure control solenoid current and the shift adapts during a drive. Measure the solenoid circuit at the case connector and again at the solenoid itself; an open wire inside the harness causes the same code as a dead coil. If the solenoids and wiring check good but pressure is still erratic, Sonnax points to a worn actuator feed limit (AFL) valve bore in the channel plate, which starves every solenoid of its 115 psi supply. Our 4T65E pressure control solenoid symptoms guide walks through the pressure checks, and the delayed engagement guide covers the slow-into-gear complaint.
This set is listed for 1997-2002 GM front-drive vehicles with the 4T65E automatic. GM revised the valve body and pressure switch assembly for 2003, so later cars need the 2003-2011 4T65E solenoid kit instead. Model years at the 2002-2003 changeover are where most fit problems happen, so compare the pressure switch plate and solenoids on your valve body with the photo, or send us your year and VIN before ordering. Every 4T65E part we carry is on the 4T65E parts page.
| Fits | 4T65E 1997-2002 |
| Part type | Pressure Control Solenoid |
| 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.
No. The listing ships the full early 4T65E set: the pressure control solenoid, the converter clutch solenoid, both shift solenoids, and the pressure switch plate shown in the photo.
No. GM changed the valve body and pressure switch assembly for 2003. Use the 2003-2011 kit for later cars, or send us your year and VIN if your car is near the changeover.
It often does when the solenoid screen is clogged or the coil is weak. P1811 can also come from worn 2nd and 3rd clutch packs or a worn AFL valve bore, so check line pressure and adapts first.
GM specifies DEXRON-VI, which is also approved for the earlier cars that originally used DEXRON-III. Check the level hot after you refill.
Yes. Clear the codes and reset the transmission adapts so the computer relearns shift times with the new solenoids, then drive it through every gear.
