4L80E Tcc Solenoid 1996-2003, new and ready to install. Fits the 4L80E. Ships fast from the USA.
A 1996-2003 Silverado or Sierra 2500 or 3500, Suburban 2500, Express or Savana van that flares the tach at 55 mph, shudders as lockup engages, or has a TCC code stored usually gets a TCC solenoid first, because it is the cheapest part in the lockup circuit. This listing is a new four-piece 4L80E solenoid set for those years: the photo shows the TCC solenoid with the pressure control (EPC) solenoid and both shift solenoids. Changing all four in one pan drop costs little more than chasing them one at a time, and it removes every electrical suspect on the valve body at once.
From the 1996 model year these trucks report OBD-II P-codes, which makes the lockup circuit easier to diagnose than on the early two-digit-code units. The module watches vehicle speed, throttle and gear, then energizes the TCC solenoid to route oil to the converter clutch apply circuit. Once applied, the module compares engine speed to turbine speed; any difference is converter slip. The solenoid only opens a passage, so lockup quality also depends on the feed and apply oil the valve body supplies. Sonnax notes that the 4L80-E uses two slip codes: P0741 for TCC slip in third gear and P1870, transmission component slipping, for TCC slip in fourth. Both are performance codes, meaning the module saw slip, not that the solenoid circuit failed.
Check the electrical side first. Unplug the case connector and measure the TCC solenoid between pins S and E: GM's 4L80-E troubleshooting data gives 10 to 14 ohms. If it is open or shorted, this set fixes the fault. If it reads in range, look harder before buying parts. On 2000-and-later 4L80E trucks, Transmission Digest's TASC Force reported converter clutches cracking just inboard of the rivet circle, producing a P1870 that may not appear for 30 to 40 miles of light driving and then sets as soon as the truck tows or climbs hills. A new solenoid will not cure a cracked converter clutch. Our 4L80E common problems guide walks through separating converter, valve body and solenoid faults, and the EPC solenoid symptoms guide covers the pressure side of the set.
The listing is for 1996-2003 4L80E applications in GM heavy-duty pickups, Suburban 2500 and full-size vans. The 2004-up units use a revised internal harness and solenoid set, so a 2004 or later truck needs a different kit. If your 4L80E is a 1991-1995 unit, its earlier pressure control solenoid style may not match; the remanufactured 1991-2003 solenoid set with range pressure switch is the other option there. Compare the connectors on your valve body to the photo or send us year and VIN to confirm. More parts for these years are in our 4L80E parts collection.
With the pan and filter off, unplug the internal harness at each solenoid and remove the retaining bolts or clips one at a time so each new solenoid goes back in the same bore. Lubricate the new O-rings with clean ATF so they do not roll or cut on installation. Check the internal harness while you are there: if the insulation is cracking from heat, swap in the 4L80E internal wiring harness, and also check that the case pass-through connector is seated and its retaining tabs are intact. Install a new filter and pan gasket, such as the 4L80E deep pan filter and gasket kit for 1999-2006 trucks, then fill with Dexron VI. Clear codes and road test through several lockup cycles, watching TCC slip on a scan tool to confirm it settles close to zero.
| Fits | 4L80E 1996-2003 |
| Part type | Tcc 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.
Yes. The photo shows a set of four: the TCC solenoid, the EPC pressure control solenoid and both shift solenoids. It does not include the range pressure switch assembly or the internal harness.
No. The listing is for 1996-2003. Later units use a revised internal harness and solenoid set, so they need a different kit.
Possibly not. Transmission Digest reports cracked converter clutches on 2000-and-later 4L80E units that set P1870 only under heavy load. Test the TCC solenoid at 10 to 14 ohms first; if it is in range, have the converter inspected.
A filter and pan gasket at minimum, and the internal harness if its insulation is brittle. Refill with Dexron VI.
There is no adaptive relearn procedure listed for this unit in our sources. Clear the codes and drive through several lockup cycles while watching slip speed to confirm the repair.
