GMT900 Door Lock Actuator OE Cross-Reference Guide (30+ OEs)

📅 Published: August 10, 2026 📂 Category: Technical Guides / GM Platform ⏱️ Reading Time: 6 min 🏷️ Tags: GMT900, Door Lock Actuator, OE Cross-Reference, Escalade, Tahoe, Yukon

GMT900 Door Lock Actuator OE Cross-Reference Guide: 30+ Part Numbers for Escalade, Tahoe & Yukon

Quick Summary: The GM GMT900 platform (Cadillac Escalade, Chevrolet Tahoe, GMC Yukon) uses 30+ interchangeable OE references across four door positions. This guide maps every known GM OE number and Dorman 931-series equivalent to the correct FL / FR / RL / RR position — so you never order the wrong part again.

1. Why Does One Vehicle Have 30+ OE Numbers?

If you've ever searched for a GMT900 door lock actuator and found dozens of seemingly different part numbers, you're not alone. This confusion stems from three factors unique to GM's parts management system:

① Engineering Change Notices (ECN): GM frequently updates component suppliers and internal designs during a model's production run. Each revision generates a new OE number — even though the part is functionally identical and backward-compatible.

② Platform Sharing: The GMT900 platform underpins the Escalade, Tahoe, Suburban, Yukon, Yukon XL, Avalanche, and Sierra/Silverado. Each brand's parts catalog may assign unique numbers to the same physical component.

③ Aftermarket Cross-References: Dorman's 931-series is the dominant aftermarket replacement. Each Dorman number maps to multiple GM OEs, adding another layer to the cross-reference matrix.

💡 ROYUAN Solution

ROYUAN manufactures a direct-fit replacement actuator for each of the four positions, covering all 30+ OE numbers in a single SKU per position. No more guessing which OE version you need.

2. Vehicle Coverage & Year Range

🚗 Cadillac Escalade

Model Years: 2007 – 2009
  • Escalade Base
  • Escalade Luxury
  • Escalade Premium
  • ESV (Extended) & EXT (Pickup)

🚙 Chevrolet Tahoe

Model Years: 2007 – 2011
  • Tahoe LS / LT / LTZ
  • Suburban 1500
  • Hybrid (2008-2013)
  • Police Package (PPV)

🚙 GMC Yukon

Model Years: 2007 – 2009
  • Yukon SLE / SLT / Denali
  • Yukon XL 1500
  • Yukon Hybrid (2008-2009)

⚠️ Year Range Alert

Tahoe/Suburban continued on GMT900 through 2011, while Escalade and Yukon switched to the updated GMT901 platform for 2010+. If you have a 2010+ Escalade or Yukon, this guide does NOT apply — contact us with your VIN for the correct part.

3. Full OE Cross-Reference Table by Position

The table below maps every known GM OE number and Dorman equivalent to its correct door position. Actuators are NOT interchangeable between positions — each has unique mounting geometry and connector orientation.

FL Front Left (Driver Side)

Source OE / Part Numbers
GM OE 15880049 20783847 20783851 25789214 25789369 25863020 25876387 25945749
Dorman 931-349

FR Front Right (Passenger Side)

Source OE / Part Numbers
GM OE 15896626 15785128 20783857 25873488 25876389 25945736
Dorman 931-108

RL Rear Left (Driver Side Rear)

Source OE / Part Numbers
GM OE 15896625 15785127 20783858 25876390 25945737
Dorman 931-109

RR Rear Right (Passenger Side Rear)

Source OE / Part Numbers
GM OE 15785123 15896623 15857628 15880052 15889954 20783846 20783849 20783850 25789211 25789213 25811735 25811736 25811737 25848880 25863021 25866299 25876382 25876385 25876386 25879295 25879296 25879297 25945748 25945751 25945752
Dorman 931-303

4. Dorman 931-Series Quick Mapping

Dorman is the most recognized aftermarket brand for GMT900 door lock actuators. Here's the definitive 1:1 mapping:

Dorman # Position Primary GM OE Application
931-349 FL Front Left 15880049 Escalade / Tahoe / Yukon
931-108 FR Front Right 15896626 Escalade / Tahoe / Yukon
931-109 RL Rear Left 15896625 Escalade / Tahoe / Yukon
931-303 RR Rear Right 15785123 Escalade / Tahoe / Yukon

💡 Why Is RR Position OE Count So High?

The Rear Right (passenger rear) position has 25 GM OE numbers — far more than other positions. This is because the RR door sees the highest usage frequency (passenger entry/exit, child seat access), leading to more failure reports and more frequent engineering revisions from GM.

5. How to Identify Your Correct Actuator

Follow these three steps to ensure you order the right part:

Step 1 — Identify Your Door Position: Stand outside the vehicle and determine which door has the faulty actuator: FL (driver), FR (passenger), RL (driver rear), or RR (passenger rear).

Step 2 — Check Your Original OE Number: Remove the door panel and locate the label on the existing actuator. It will show a GM OE number (format: 1xxxxxxx or 2xxxxxxx). Match it to the tables above.

Step 3 — Verify by VIN: If the label is missing or unreadable, provide your 17-digit VIN to your parts supplier. A proper VIN lookup will return the exact OE number for your vehicle's build configuration.

⚠️ Common Mistake

Never assume all four doors use the same actuator. GMT900 actuators are position-specific — a FL actuator will NOT physically fit the RR position, even though they may look similar. The mounting bracket angle and connector orientation differ between positions.

6. Common Failure Symptoms

How do you know your GMT900 door lock actuator is failing? Watch for these signs:

• Door won't lock/unlock with remote: The most common symptom. The actuator motor has burned out or the internal gear has stripped.
• Intermittent locking: The actuator works sometimes but not always — typically a worn motor brush or corroded connector.
• Clicking/grinding noise: Internal plastic gear teeth are worn. The motor runs but can't engage the latch.
• Door lock button on dash doesn't work: If all doors fail simultaneously, check the BCM (Body Control Module) first. If only one door fails, it's the actuator.
• Door locks itself while driving: Erratic actuator behavior can trigger phantom locking. Replace immediately for safety.

Frequently Asked Questions

What OE numbers fit the GMT900 door lock actuator?
The GMT900 platform uses 30+ OE references across four positions. Key numbers: FL = 15880049 (Dorman 931-349), FR = 15896626 (931-108), RL = 15896625 (931-109), RR = 15785123 (931-303). See the full tables above for all 30+ cross-references.
Are GMT900 door lock actuators interchangeable between positions?
No. Each position (FL, FR, RL, RR) has unique mounting geometry and connector orientation. A front-left actuator will NOT fit the rear-right position. Always order the position-specific part.
What years does this fit?
Cadillac Escalade & GMC Yukon: 2007–2009. Chevrolet Tahoe & Suburban: 2007–2011. The year range difference is because Tahoe/Suburban continued on GMT900 longer.
What is Dorman 931-303 a replacement for?
Dorman 931-303 replaces the rear right (passenger rear) door lock actuator. Primary GM OE: 15785123, plus 24 additional superseded OE numbers. Fits Escalade 2007-2009, Tahoe 2007-2011, Yukon 2007-2009.
Can I replace just the motor instead of the whole actuator?
Technically possible but not recommended. The actuator is sold as a sealed assembly. Opening it voids structural integrity, and sourcing a compatible bare motor is difficult. Full assembly replacement ensures proper gear alignment and weather sealing.
How long does replacement take?
Typically 45–90 minutes per door for a DIY installer. You'll need to remove the interior door panel, disconnect the electrical connector, unbolt the old actuator (usually 2-3 bolts), and reverse the process. No special tools required.
What's the wholesale MOQ from ROYUAN?
Minimum order is 10 pieces, and you can mix FL/FR/RL/RR positions in any combination. Full carton is 40 pcs (20.87 kg, 49×36×38 cm). Contact us for wholesale pricing.

🔧 Ready to Order? Get Wholesale Pricing Now

ROYUAN direct-fit GMT900 door lock actuators — all 30+ OEs covered, 4-position color-coded, 12-month warranty. MOQ 10 pcs.

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Created on：2026-08-10 13:29