P2723 on 2001-2005 GMC Sierra: Pressure Control Solenoid 'E' Causes and Fixes

What's Unique About the 2001-2005 Gmc SIERRA

For the GMT800 platform (2001-2005 Sierra), this code is highly unusual and likely indicates a diagnostic error. These trucks were equipped with 4-speed (4L60-E, 4L80-E) or Allison 5/6-speed transmissions, which do not use a 'Pressure Control Solenoid E' in their nomenclature. The P2723 code is specific to later model 6-speed automatic transmissions like the 6L80 and 6L90, which GM began using in trucks around the 2007 model year. The cited TSBs, #PIP4972C and #PIP4379K, are valid but apply to these later 6-speed transmissions, not the 2001-2005 models. If this code appears on a 2001-2005 Sierra, the first step should be to verify the vehicle year and transmission model, and confirm the scanner is reading the correct codes.

Diagnostic Flowchart

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

Symptoms You May Notice

• Vehicle will not move in forward or reverse. [PIP4972C, 33]
• Harsh, delayed, or erratic shifts.
• Transmission slipping (engine RPMs rise without an increase in speed).
• Transmission may not shift out of a gear or may be stuck in one gear (e.g., 3rd or 5th).
• Check Engine Light or transmission warning light is on.
• Vehicle enters 'limp mode'.
• Increased fuel consumption.
• Engine may stall when coming to a stop.

Most Likely Causes

1. Debris in Valve Body Separator Plate Orifices 🔴 High Probability → Shop Transmission Valve Body This is specifically called out in manufacturer TSB #PIP4972C for GM trucks equipped with 6-speed automatic transmissions (e.g., 6L80, 6L90).
   How to confirm: After dropping the transmission pan, remove the valve body and 🎬 See this walkthrough on how to remove the valve body. visually inspect the separator plate and its small orifices for metallic or clutch material debris.
   Typical fix: Clean the valve body and 🎬 Watch: How to disassemble and clean your valve body. separator plate thoroughly. If the plate is damaged or excessively worn, it should be replaced. A full transmission fluid and filter change is required.
   Est. part cost: $50-$150 for a separator plate and gaskets. An ACDelco separator plate for a 6L80 can be part number 24248227 or similar.
2. Faulty Pressure Control Solenoid 'E' 🔴 High Probability → Shop Transmission Clutch Pressure Control Solenoid
   How to confirm: After accessing the valve body, the solenoid can be tested with a multimeter for correct resistance. A professional can also command the solenoid on and off with a capable scan tool (like a Tech2 for GM vehicles) to check its function.
   Typical fix: Replace the faulty solenoid. On 6L80/6L90 transmissions, the solenoids are part of the complete Control Solenoid Valve Assembly, which includes the TCM. This assembly is replaced as a single unit and requires programming after installation.
   Est. part cost: $250-$900 for a complete TEHCM (TCM/Solenoid) unit, such as ACDelco part number 24256861 or 24275874 for applicable years.
3. Low or Dirty Transmission Fluid 🟡 Medium Probability → Shop Transmission Assembly
   How to confirm: Check the transmission fluid level and condition. Fluid should be at the correct level, red in color, and not smell burnt. Dark, brown, or metallic-flecked fluid indicates a problem.
   Typical fix: If low, top off with the correct fluid type (DEXRON-VI for 6L80/6L90 applications). If dirty, perform a transmission fluid and filter change. Note that this may not fix the code if damage has already occurred.
   Est. part cost: $75-$150 for fluid and a filter.
4. Damaged Internal Wiring Harness ⚪ Low Probability → Shop Transmission Wiring Harness
   How to confirm: Visually inspect the wiring harness inside the transmission pan for any signs of brittle, cracked, or damaged wires and connectors.
   Typical fix: On 6L80/6L90 transmissions, the wiring is integrated into the Control Solenoid Valve Assembly (TEHCM), so the entire unit is typically replaced.
   Est. part cost: $250-$900

Rare But Worth Checking

• Faulty Transmission Control Module (TCM): → Shop Transmission Assembly A TCM failure is possible. On 6L80/6L90 transmissions, the TCM is integrated with the valve body solenoids into a single unit (TEHCM). A failure here often requires replacing the entire assembly and is a common fix for this code. This should be considered a primary cause, not a rare one, for these specific transmissions.
• Failing Transmission Pump or Internal Hydraulic Leakage: → Shop Transmission Assembly A weak pump or internal leaks can cause a general loss of pressure, which might trigger a specific solenoid code. This usually points to a more significant internal transmission failure requiring a rebuild or replacement.

Diagnosis Steps

1. Verify Vehicle and Transmission: Confirm the vehicle is a 2007 or newer model with a 6-speed (6L80/6L90) transmission. If it is a 2001-2005 model, re-scan with a different tool to check for a diagnostic error.
2. Check the transmission fluid level and condition. If the fluid is low, burnt, or contains debris, this indicates a problem that needs further investigation.
3. Scan the TCM for all stored codes. Note any other codes that appear with P2723, especially P0700 or P0877.
4. Drop the transmission pan and inspect for excessive metal shavings or clutch material, which would indicate a severe internal failure.
5. Visually inspect the internal wiring harness and connectors for any damage.
6. Remove the transmission valve body and the integrated TEHCM (TCM/solenoid assembly).
7. Inspect the valve body separator plate orifices for debris, as recommended by TSB #PIP4972C.
8. Test the resistance of Pressure Control Solenoid 'E' with a multimeter if possible, though it is part of the non-serviceable TEHCM. A more practical test is to replace the TEHCM.
9. If a faulty component is found (most commonly the TEHCM or debris in the plate), replace it. Clean all parts thoroughly before reassembly.
10. Install a new transmission filter, pan gasket, and refill with DEXRON-VI fluid.
11. Clear the trouble codes, program the new TEHCM to the vehicle, and perform a transmission service fast learn/relearn procedure with a capable scan tool.
12. Perform a test drive to ensure the repair was successful.

Parts You'll Likely Need

• Control Solenoid Valve Assembly (TEHCM) (OEM #24256861, 24275874, 24255209 (Varies by year)) — On 6L80/6L90 transmissions, the solenoids and TCM are a single, non-serviceable unit. This is the most common part replaced to fix P2723.
  Trusted brands: ACDelco (GM Genuine)
  OEM price range: $400-$900
  Aftermarket price range: $250-$500 (Remanufactured)
• Transmission Filter Kit (Filter and Gasket) — The filter and pan gasket must be replaced any time the transmission pan is removed for service.
  Trusted brands: ACDelco, Wix, ATP
  OEM price range: $40-$70
  Aftermarket price range: $20-$40
• Valve Body Separator Plate (OEM #24248227 (Example for 6L80)) — TSB #PIP4972C identifies debris in the separator plate as a primary cause. If it's warped or damaged during cleaning, it must be replaced.
  Trusted brands: ACDelco
  OEM price range: $50-$150
  Aftermarket price range: $40-$100

Related Codes That Often Appear With This One

• P0700 — P0700 is a generic code indicating the Transmission Control Module (TCM) has stored a fault. It almost always appears alongside a more specific transmission code like P2723 to signal the check engine light.
• P0877 — This code for 'Transmission Fluid Pressure Sensor/Switch D Circuit Low' is mentioned alongside P2723 in TSB #PIP4972C, indicating they can be set together by the same root cause of debris in the valve body.
• P0752 — This code for 'Shift Solenoid 'A' Stuck On' can appear with P2723, indicating a wider control issue within the valve body or TEHCM, as reported by some owners.

Technical Service Bulletins (TSBs) & Recalls

• PIP4972C: Addresses a no-move condition and links DTCs P0877 or P2723 to debris in the valve body separator plate.
• PIP4379K: Lists P2723 in a group of potential transmission codes and prioritizes diagnosis of P0701.

Platform-Specific Known Issues

• TSB #PIP4972C notes that debris in the valve body separator plate orifices can cause a no-move condition and set codes P2723 or P0877 on vehicles with 6-speed automatic transmissions.
• TSB #PIP4379K lists P2723 among a wide range of transmission codes and advises diagnosing P0701 first if it is present.
• On 6L80/6L90 transmissions, the entire Control Solenoid and Valve Body Assembly (which includes the TCM) is often replaced as a unit to resolve this code, as individual solenoids are not serviceable.

Mechanic-Grade Diagnostic Values

• Pressure Control Solenoid (PWM) Resistance — expected: 3-8 Ohms. Failure: A reading outside this range indicates a faulty solenoid coil.
• Shift Solenoid (On/Off) Resistance — expected: 20-40 Ohms. Failure: A reading outside this range indicates a faulty solenoid coil.
• Pressure Control Solenoid (PWM) Current Draw — expected: 1.5–4.0 amps at 12 volts. Failure: Incorrect amperage suggests a failing solenoid; this test should be performed quickly to avoid damage.
• TEHCM Regulated Voltage to Solenoids — expected: 8.3–9.3 volts. Failure: Incorrect voltage from the TCM indicates a fault within the TEHCM itself.
• Pressure Switch Electrical Check — expected: Near OL (open loop) with no pressure, and approx. 10 Ohms when pressure is applied (e.g., with a pencil eraser).. Failure: Readings that do not change or are incorrect signify a failed pressure switch membrane or circuit within the TEHCM.

Scan Tool Commands That Help

• GM Tech2 / GDS2: Service Fast Learn Adapts — This procedure is mandatory after replacing the TEHCM or valve body to allow the TCM to learn clutch fill times and pressure offsets. Failure to perform this can result in poor shift quality or damage.
• GM Tech2 / GDS2: Solenoid Cleaning Procedure — If a solenoid performance code like P2723 is suspected to be caused by debris, this function can be used to cycle all solenoids rapidly to dislodge and flush contaminants before resorting to parts replacement.
• GM Tech2 / GDS2: Solenoid Output Overrides / Controls — Used during a bench test with a special test plate (J-47825-1) and shop air to command individual solenoids on and off, verifying their mechanical function by monitoring an air pressure gauge.

Wiring & Ground Locations

• G110 / G114 — On 2019+ models, these are body and engine harness grounds in the engine compartment. On earlier GMT900 (2007-2013) trucks, critical grounds are located on the engine block, firewall, and frame.. Loose or corroded engine and chassis grounds are a known cause of numerous, seemingly unrelated electrical issues on GM trucks, including erratic transmission behavior and false TCM codes. Verifying all major grounds are clean and tight is a crucial, often overlooked, diagnostic step.
• TEHCM Main Connector — The 16-pin main connector on the side of the 6L80/6L90 transmission case.. This is the sole electrical interface for the entire internal TEHCM assembly. All power, ground, and communication signals pass through this connector. Checking for corrosion or backed-out pins here is essential before condemning the internal components.

Real Owner Repair Stories

• Chevy Tahoe Forum (Vehicle with P2723 code) — Check engine light with code P2723.
  ✅ What actually fixed it The confirmed repair is to replace the entire Control Valve Solenoid & TCM assembly (TEHCM). The forum member noted that diagnosis requires a Tech2 scan tool for pressure checks and cleaning procedures before replacement.
• Chevrolet Forum (2011 Chevy Traverse with 180,000 miles, used for towing.) — Check engine light came on, then vehicle would not move forward or backward. Codes P2723 and P0700 were present.
  ❌ Tried (didn't work) The repair shop attempted to add transmission fluid after finding line leaks.
  ✅ What actually fixed it The shop diagnosed a 'completely blown transmission' that required full replacement. This suggests the initial solenoid/pressure failure led to catastrophic internal mechanical damage.

OEM Part Supersession History

• 24256861 → 19435614 — Part update/revision by GM.
  Heads up: Part number 24256861 is a widely used service number for the TEHCM in many 6L80/6L90 and Allison applications. Other interchangeable numbers include 25798353, 29545535, and 24256670. It is critical to match the TEHCM generation (Gen 1 vs Gen 2, pre/post 2010) and programming to the vehicle's VIN.

Model Year Variations Within This Range

• 2001-2006 vs 2007+: The most significant variation is the transmission itself. 2001-2005 GMC Sierras use 4-speed (4L60E/4L80E) or Allison transmissions which are not subject to code P2723. The code applies to the 6-speed 6L80/6L90 automatic transmissions introduced in trucks around 2007.
• Pre-2010 vs Post-2010 (6L80/6L90): Early generation (Gen 1) TEHCMs used in 2006-2010 models were more prone to pressure switch and heat-related failures. Later (Gen 2) TEHCMs featured improved solenoids and updated logic and are not directly interchangeable without correct programming.
• Pre-2014 vs 2014+ (6L80/6L90): In 2014, the valve body design was updated to include an eighth checkball to resolve a clunking complaint. The separator plate was also changed. Using the wrong plate/checkball combination during a rebuild will cause hydraulic problems.