P2714 on 2021-2023 Chevrolet Trailblazer: Transmission Solenoid & CVT Failure Guide

What's Unique About the 2021-2023 Chevrolet TRAILBLAZER

The 2021-2023 Trailblazer uses a VT40 Continuously Variable Transmission (CVT), which has a specific and documented failure path associated with code P2714. Unlike a simple solenoid swap in some traditional automatics, this code on the Trailblazer often points to a cascading failure. A technical service bulletin from GM, TSB 24-NA-009 (which supersedes PIP5819B), outlines that the issue can start with a sticking valve but may escalate to internal case wear that requires a complete transmission replacement, making diagnosis critical.

Diagnostic Flowchart

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

Symptoms You May Notice

• Sudden loss of forward gears
• Transmission slipping (engine RPMs rise without an increase in speed)
• Hesitation or lack of acceleration from a stop.
• Check Engine Light is on
• "Transmission Control Fault" or similar warning on the dash
• Hesitation or delay when shifting from Reverse to Drive.
• Vehicle may not move at all when in gear.

Most Likely Causes

1. Sticking Clutch Regulator Valve in the Valve Body 🔴 High Probability → Shop Transmission Valve Body This is the initial point of failure documented in GM's Technical Service Bulletin 24-NA-009 (formerly PIP5819). It is the most common scenario if the code is intermittent.
   How to confirm: A technician will follow the TSB diagnostic procedure. If the code can be cleared and doesn't immediately return after test drives and several wide-open-throttle accelerations, a sticking valve is the likely culprit.
   Typical fix: Replacement of the transmission control valve body assembly (not just the solenoid).
   Est. part cost: $500-$900
2. Damaged Forward Clutch Piston 🟡 Medium Probability This is the second stage of failure noted in TSB 24-NA-009, occurring if the initial valve body issue is not addressed or as part of the progressive failure. The piston seal can leak, causing a pressure drop. 🎬 See how pressure loss affects similar GM transmission systems.
   How to confirm: Requires transmission disassembly to inspect the clutch components for wear or damage. A scan tool may show pulley pressure dropping below 300 kPa during an auto-stop event, indicating a possible piston seal leak.
   Typical fix: Requires transmission teardown to replace the Forward Clutch Piston and Housing (GM Part No. 24298744) and related clutch plates.
   Est. part cost: $150-$300 for the piston/housing, plus additional for plates and seals.
3. Worn Primary Pulley Bearing Bore / Damaged Transmission Case ⚪ Low Probability → Shop Transmission Assembly This is the most severe failure mode documented in TSB 24-NA-009, representing catastrophic internal wear. The bearing spins in the case, allowing the turbine shaft to become off-center, causing a major pressure leak.
   How to confirm: This is a diagnosis of exclusion. If the valve body and forward clutch piston are ruled out, and pressure tests show significant leaks, internal case damage is presumed. The bearing bore itself cannot be directly inspected without full disassembly, but scoring on the oil pump is a key indicator.
   Typical fix: Complete transmission replacement is required, as the case itself is not a repairable component.
   Est. part cost: $4000-$6500

Rare But Worth Checking

• Low or Contaminated CVT Fluid: While less common as the root cause for this specific code, incorrect fluid level can cause a wide range of transmission problems, including erratic solenoid operation. It's the first thing a technician should verify per the TSB. In some cases, a fluid exchange has been anecdotally linked to the problem appearing, possibly due to incorrect fluid level after the service.

Diagnosis Steps

1. Verify P2714 is set as a current or history code using a professional scan tool.
2. Check the transmission fluid level and condition, ensuring the transmission is at the correct operating temperature (140°-176°F or 60°-80°C) per GM procedure SI document 4818020.
3. If fluid is correct, test drive the vehicle to confirm symptoms like slipping or loss of engagement.
4. If symptoms are not present, clear the DTC and perform 3-4 wide-open-throttle (WOT) accelerations to attempt to reproduce the fault.
5. If the code does NOT reset after WOT pulls, the recommended fix is to replace the control valve body.
6. If the code DOES reset or the slipping is consistent and repeatable, perform advanced diagnostics with a scan tool.
7. Monitor primary and secondary pulley pressures. A significant pressure drop, especially during an auto-stop event (dropping below 300-400 kPa), can indicate an internal leak from the piston seal.
8. If a pressure leak is confirmed or symptoms are severe (no forward motion, burnt fluid), the transmission must be disassembled to inspect the forward clutch piston and oil pump.
9. If the forward clutch piston is damaged, it and related plates are replaced.
10. If the forward clutch piston is intact, inspect the oil pump for scoring. Scoring indicates the primary pulley bearing has spun in the case, requiring complete transmission replacement.

Parts You'll Likely Need

• Transmission Control Valve Body — This is the most common repair for an intermittent P2714, addressing a sticking clutch regulator valve as per TSB 24-NA-009.
  Trusted brands: ACDelco
  OEM price range: $500-$900
  Aftermarket price range: $400-$700
• Forward Clutch Piston and Housing (OEM #24298744) — Required if transmission disassembly reveals damage to the forward clutch piston, the second stage of failure in the TSB. This part supersedes previous number 24295797.
  Trusted brands: ACDelco / GM Genuine Parts
  OEM price range: $150-$300
• VT40 (MRG) CVT Transmission Assembly — Required in cases of severe internal wear, specifically damage to the transmission case at the primary pulley bearing bore.
  Trusted brands: ACDelco, Moveras (Remanufactured), National Powertrain (Remanufactured)
  OEM price range: $4000-$6500
  Aftermarket price range: $2500-$4000

Related Codes That Often Appear With This One

• P0700 — P0700 is a generic code that means the Transmission Control Module (TCM) has stored a fault. It acts as a 'check engine light' for the transmission and will almost always be present alongside a specific transmission code like P2714.

Technical Service Bulletins (TSBs) & Recalls

• 24-NA-009 / PIP5819B / PIP5819A: 'Loss of Forward Gear, Slipping, Malfunction Indicator Lamp Illuminated - DTC P2714 Set' - This bulletin is the primary source for understanding the cause, diagnosis, and correction for this code on this vehicle. It outlines a progression of failure from a sticking valve body to a damaged case requiring transmission replacement. The latest version, 24-NA-009, was issued in March 2024 and supersedes all previous versions.

Platform-Specific Known Issues

• The VT40 CVT transmission in 2021-2023 Trailblazers is subject to GM Technical Service Bulletin #24-NA-009 (formerly PIP5819B), which details a known failure pattern for code P2714, ranging from a sticking valve to complete transmission failure.
• An owner of a 2021 Trailblazer filed a complaint with the NHTSA (ODI #11645476) after experiencing a dangerous loss of power and being diagnosed with code P2714, highlighting the real-world safety implications of this fault.

Mechanic-Grade Diagnostic Values

• Transmission Fluid Temperature for Level Check — expected: 60°C - 80°C (140°F - 176°F). Failure: Checking the fluid level outside this temperature range can lead to an incorrect reading and misdiagnosis.
• Pressure Control Solenoid Resistance (Typical GM) — expected: 3 - 8 ohms. Failure: A reading of infinity (open circuit) or near zero (short circuit) indicates a failed solenoid coil. Note: This is a general GM value; specific VT40 values are not published.

Scan Tool Commands That Help

• GDS2 (GM Dealer Tool): Transmission Adaptive Pressure Reset — This procedure must be performed after replacing the transmission control module (TCM), control valve body, or the entire transmission assembly to allow the module to learn the hydraulic characteristics of the new components and ensure proper shift quality.

OEM Part Supersession History

• 24260894, 24263592, 24295797 → 24298744 — Part has been updated by the manufacturer. This is for the Forward Clutch Piston and Housing.

Model Year Variations Within This Range

• 2021-2023: The failure pattern described in TSB 24-NA-009 is persistent across the entire 2021-2023 model year range, indicating the root cause was not resolved during this period.
• 2024 (very low mileage): A new potential cause for P2714 has been identified in very low mileage (under 1,000 miles) 2024 models, involving a dislodged reverse internal gear retaining ring, which causes a no-movement condition.