P2723 on 2006-2010 Chevrolet Silverado: Pressure Control Solenoid 'E' Fixes

What's Unique About the 2006-2010 Chevrolet SILVERADO

For this generation of Silverado, especially models from 2007 onwards with the 6L80/6L90 transmission, the pressure control solenoids are not individual, replaceable parts. They are integrated into the Transmission Electro-Hydraulic Control Module (TEHCM), which combines the TCM and all solenoids into one unit inside the transmission. This means a single solenoid failure often requires replacing the entire TEHCM, which then needs to be programmed to the vehicle. Furthermore, General Motors issued specific service bulletins (TSBs) like #PIP4972C that directly address code P2723, pointing to a known issue where debris can clog the valve body separator plate, causing this exact code and sometimes a complete loss of movement.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Generation note: The 2006-2010 year range covers two Silverado generations: the end of the GMT800 platform (sold as the 'Classic' in 2007) and the GMT900 platform (starting in 2007). While the code can appear on older 4-speed transmissions (4L60-E), it is most commonly associated with the 6-speed 6L80 and 6L90 transmissions introduced with the GMT900 platform. The provided TSBs and the most common failure pattern (integrated TEHCM) are primarily relevant to these 6-speed models.

Symptoms You May Notice

• Complete failure to move in forward or reverse [PIP4972C]
• Harsh, erratic, or delayed gear shifts
• Transmission slipping (engine revs but truck doesn't accelerate)
• Vehicle enters 'limp mode' with reduced power, often stuck in 5th gear
• Check Engine Light or Transmission Warning Light is on
• Transmission overheating or fluid smelling burnt
• Engine stalls when stopping or putting the vehicle in gear

Most Likely Causes

1. Debris in Transmission Valve Body 🔴 High Probability → Shop Transmission Valve Body GM Technical Service Bulletin #PIP4972C specifically calls out inspecting the valve body separator plate orifices for debris as a primary diagnostic step for code P2723. This debris, often clutch material, can block passages and prevent solenoids from operating.
   How to confirm: Drop the transmission pan and remove the valve body for visual inspection of the separator plate and fluid passages. Dark, sludgy fluid is a strong indicator.
   Typical fix: Thoroughly clean the valve body and separator plate. If the plate is damaged or warped, it must be replaced.
   Est. part cost: $50-$150 for a new separator plate and gaskets.
2. Failed Pressure Control Solenoid 'E' / TEHCM Assembly 🔴 High Probability → Shop Transmission Clutch Pressure Control Solenoid On 6L80/6L90 transmissions, the solenoids are part of the TEHCM, which is a known failure point. The solenoid can fail electrically or mechanically (plunger seizes).
   How to confirm: After accessing the valve body, the entire TEHCM unit is what gets tested. A professional scan tool can attempt to command the solenoid; failure to respond points to a bad TEHCM. Resistance checks are less common due to the integrated nature.
   Typical fix: Replace the entire TEHCM (TCM/solenoid pack) and program it to the vehicle. This is not a single-solenoid swap. 🎬 See what to expect when replacing the TEHCM.
   Est. part cost: $250-$500 for a remanufactured ACDelco TEHCM.
3. Low or Dirty Transmission Fluid 🟡 Medium Probability → Shop Transmission Assembly Low fluid prevents the pump from creating enough pressure for the solenoids to manage, while dirty/degraded fluid can cause blockages and solenoid failure.
   How to confirm: Check the transmission fluid level and condition. The fluid should be at the correct level, red in color (DEXRON-VI), and not smell burnt.
   Typical fix: Perform a transmission fluid and filter change. If the fluid is very dark or contains metal shavings, a more significant internal failure is likely.
   Est. part cost: $60-$120 for a filter kit and DEXRON-VI fluid.
4. Wiring Harness or Connector Issues ⚪ Low Probability
   How to confirm: Visually inspect the main wiring harness connector at the transmission case and the internal harness leading to the TEHCM for any signs of damage, corrosion, or loose pins.
   Typical fix: Repair or replace the damaged section of the wiring harness or the connector.
   Est. part cost: $20-$200 depending on the extent of the damage.

Rare But Worth Checking

• Faulty Transmission Control Module (TCM): → Shop Transmission Assembly This is uncommon as a separate failure on 6L80/6L90 since the TCM is integrated into the TEHCM. Before replacing it, all other possibilities must be ruled out. Sometimes a software reflash can resolve the issue.
• Internal Mechanical Failure: In some cases, P2723 can be a symptom of a larger issue, like a failing clutch pack or a blown piston seal, which prevents the transmission from holding pressure even if the solenoid is functional. If fluid is full of metal shavings, this is likely the cause.

Diagnosis Steps

1. Check the transmission fluid level and condition. If low, top it off. If dirty or burnt, a fluid and filter change is a good starting point.
2. Scan for other transmission-related codes to get a broader picture of the problem.
3. Follow the guidance in TSB #PIP4972C: Drop the transmission pan and inspect for excessive debris.
4. Remove the transmission valve body and inspect the separator plate orifices for blockages. [PIP4972C]
5. For 6L80/6L90 models, if the valve body is clean, the next logical step is to suspect the TEHCM (solenoid/TCM assembly). A professional scan tool can help confirm if the solenoid is unresponsive.
6. Inspect the internal and external transmission wiring harnesses for any signs of damage, corrosion, or loose connections.
7. If all other components are verified to be good, the issue may be a rare internal mechanical failure.

Parts You'll Likely Need

• Transmission Control Module (TEHCM) (OEM #ACDelco 24256523 (Gen 1)) — For 6L80/6L90 transmissions, this integrated unit contains the TCM and all solenoids, including the faulty 'E' solenoid. It is the most common part replaced to fix this code.
  Trusted brands: ACDelco (GM Genuine)
  OEM price range: $300-$500 (Remanufactured)
  Aftermarket price range: $250-$450
• Transmission Valve Body Separator Plate — TSB #PIP4972C identifies debris blocking this plate as a primary cause. It may be damaged during cleaning or require replacement if warped.
  Trusted brands: ACDelco
  OEM price range: $70-$150
  Aftermarket price range: $40-$90
• Transmission Filter and Pan Gasket Kit — This is required for any job that involves dropping the transmission pan.
  Trusted brands: ACDelco
  OEM price range: $40-$70
  Aftermarket price range: $20-$40
• Automatic Transmission Fluid (ATF) — The transmission will need to be refilled with the correct fluid (typically DEXRON-VI) after the service.
  Trusted brands: ACDelco
  OEM price range: $10-$15 per quart
  Aftermarket price range: $8-$12 per quart

Related Codes That Often Appear With This One

• P0700 — This is a generic transmission fault code that simply indicates the TCM has stored a specific fault, like P2723. It often appears as a companion code.
• P0877 — This code for 'Transmission Fluid Pressure Sensor/Switch D Circuit Low' is mentioned alongside P2723 in TSB #PIP4972C, indicating they can be triggered by the same root cause, such as debris in the valve body.

Technical Service Bulletins (TSBs) & Recalls

• PIP4972C: Addresses a no-move condition and specifically mentions inspecting the valve body separator plate for debris when P2723 is present.
• PIP4379K: Lists P2723

Platform-Specific Known Issues

• A known issue documented in TSB #PIP4972C involves debris clogging the valve body separator plate, leading to a no-move condition and codes P2723 or P0877.
• TSB #PIP4379K lists P2723 among a wide range of transmission codes and advises following standard diagnostics, starting with checking the fluid level.
• On the 6L80/6L90 transmissions, the integrated design of the TEHCM means a single solenoid failure requires the replacement and programming of the entire control module assembly.

Mechanic-Grade Diagnostic Values

• Pressure Control Solenoid (PWM) Resistance (6L80/6L90 TEHCM) — expected: 3-8 Ω (Ohms). Failure: A reading outside this range indicates a failed solenoid coil, requiring TEHCM replacement.
• Shift Solenoid (On/Off) Resistance (6L80/6L90 TEHCM) — expected: 20-40 Ω (Ohms). Failure: A reading outside this range points to a faulty shift solenoid within the TEHCM assembly.
• Line Pressure at Idle (6L80/6L90) — expected: Approximately 45-80 PSI. Failure: Significantly lower pressure can indicate a failing pump, internal leaks, or severe blockages.

Scan Tool Commands That Help

• GDS2 / Tech 2: Solenoid Valve Cleaning Procedure — After a performance DTC like P2723 is set, this automated function cycles all solenoids to flush out potential debris. It should be attempted before replacing the TEHCM.
• GDS2 / Tech 2 or equivalent J2534 tool: Service Fast Learn Adapts / Transmission Adaptive Values Learn — This procedure is mandatory after replacing the TEHCM, valve body, or the entire transmission. It resets and relearns the clutch apply pressures and shift timing. Failure to perform this can result in harsh shifts or damage.
• GDS2 / Tech 2 or equivalent J2534 tool: TCM Programming / Calibration Update — Required when a new TEHCM is installed. The module must be flashed with the correct software and programmed with the vehicle's VIN to function.

Wiring & Ground Locations

• X1/J1 Connector (16-pin round) — The main external wiring harness connector on the passenger side of the 6L80/6L90 transmission case.. This is the primary interface between the vehicle's main harness and the internal TEHCM. Corrosion, moisture intrusion, or improperly seated connectors here can cause a loss of communication or power to the TEHCM, triggering various codes including P2723. It is a twist-lock connector that is often not fully seated, causing intermittent issues.
• Pin 4 & 5 at 16-pin Connector — Within the main X1/J1 transmission connector.. Pin 4 is Battery (+) and Pin 5 is Ground (-). Verifying stable voltage and a solid ground at these pins is a critical first step in diagnosing any electrical fault with the TEHCM. Voltage drops or poor ground can cause erratic solenoid operation.
• Pin 10 & 11 at 16-pin Connector — Within the main X1/J1 transmission connector.. These are the CAN Hi and CAN low communication lines. Without proper communication on these circuits, the TEHCM cannot receive commands from the ECM or send status updates, leading to fault codes and limp mode.

Real Owner Repair Stories

• SilveradoSierra.com forum user (2009 Chevrolet Silverado 1500 w/ 6L80) — Check engine light on, harsh 1-2 shift, code P2723.
  ❌ Tried (didn't work) Initially suspected fluid or a simple sensor issue.
  ✅ What actually fixed it The owner took the truck to a transmission shop. The shop diagnosed a failed TEHCM (solenoid body). Replacing the TEHCM and programming it to the vehicle resolved all symptoms and cleared the code.

OEM Part Supersession History

• 24256523 (Gen 1 TEHCM) → Multiple, including 24256939, 24261870, 24275873, 24294925 — Revisions to improve reliability of internal electronics, pressure switches, and solenoids. Later generations are generally considered more robust.
  Heads up: TEHCMs are year- and model-specific. Installing a TEHCM from a different year or with an incompatible calibration ('Tag ID') will result in a no-start, no-shift, or immediate limp mode. The new module MUST be programmed with the vehicle's VIN and correct calibration file from GM.

Model Year Variations Within This Range

• 2007-2010 (GMT900 w/ 6L80/6L90): The primary cause is the integrated TEHCM assembly. Diagnosis involves testing the entire module via scan tool commands or resistance checks on the assembly, and the fix is replacing the whole unit and reprogramming.
• 2006-2007 'Classic' (GMT800 w/ 4L60-E/4L65-E): On these 4-speed transmissions, P2723 typically refers to the 3-2 control (3-2 shift) solenoid. This is an individual, replaceable solenoid located on the valve body. The diagnosis is simpler, involving a resistance check of the specific solenoid and replacing only that part if it has failed, which is a much less expensive repair.