C0765 on 2007-2014 Chevrolet Suburban: Right Rear TPMS Fault, Causes, and Fixes

What's Unique About the 2007-2014 Chevrolet SUBURBAN

On the GMT900 platform, which includes the 2007-2014 Suburban, a single module called the Remote Control Door Lock Receiver (RCDLR) processes signals from both the tire pressure (TPMS) sensors and the key fobs for the security system. Because of this shared architecture, a failing RCDLR can cause a confusing mix of symptoms: a TPMS code like C0765, non-working key fobs, and even a no-start condition with the security light on. This is a well-documented issue, and mechanics often look for this combination of symptoms to quickly diagnose a faulty RCDLR instead of mistakenly focusing only on the tire sensor.

Diagnostic Flowchart

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

Symptoms You May Notice

• "Service Tire Monitor System" message in the driver information center (DIC).
• TPMS warning light is on (often flashes for one minute at startup, then stays solid).
🎬 See how to reset the TPMS light on your Suburban.
• Key fobs are inoperative or have very poor range (cannot lock, unlock, or use remote start).
• "No Remote Detected" message appears on the DIC.
• Vehicle may not start or may start and then immediately stall (no-crank or start-stall).
• Security warning light is illuminated on the instrument cluster.
• The tire pressure display for the right rear (and possibly others) shows dashes ("--").
• In some cases, the vehicle will only start if the key fob is placed in the dedicated transmitter pocket.
🎬 Watch: How to program key fobs for 2007-2014 models.

Most Likely Causes

1. Failed Remote Control Door Lock Receiver (RCDLR) 🔴 High Probability → Shop Keyless Entry Receiver This module is a known failure point on the GMT900 platform. It processes both TPMS and key fob signals, and internal faults can cause widespread communication issues.
   How to confirm: The most telling sign is the simultaneous failure of the TPMS system (especially codes C0750, C0755, C0760, C0765 together) and all key fob functions. 🎬 Watch: Diagnosing a failed RCDLR with these exact symptoms. A professional scan tool will show a loss of communication with the RCDLR.
   Typical fix: Replace the RCDLR module and program the new unit to the vehicle's VIN using a GM Tech 2 or equivalent bidirectional scanner.
   Est. part cost: $40-$100
2. Failed Right Rear TPMS Sensor 🟡 Medium Probability → Shop Tire Pressure Monitoring System (TPMS) Sensor The non-rechargeable battery inside the sensor has a finite lifespan of 7-10 years. For this vehicle range, many original sensors are at or beyond their expected service life.
   How to confirm: This is the likely cause if C0765 is the only code present and the key fobs work normally. A tire shop can use a TPMS tool to attempt to activate the sensor; if it doesn't respond, it has failed.
   Typical fix: Replace the TPMS sensor in the right rear tire and perform the TPMS relearn procedure.
   Est. part cost: $25-$70
3. RCDLR Antenna or Wiring Connection Issue ⚪ Low Probability As documented in TSB 16-NA-061, the coaxial antenna cable for the RCDLR can become disconnected at the module, at the antenna amplifier, or at the rear glass antenna, leading to signal loss. Additionally, forum users report finding broken power wires for the RCDLR in the driver's side door sill/rocker panel area.
   How to confirm: Visually inspect the antenna connections behind the rear interior trim panels. The RCDLR is typically located behind the driver's side D-pillar (rearmost pillar) trim. Check for 12V power at the RCDLR connector.
   Typical fix: Securely reconnect the coaxial antenna cable or repair the broken power/ground wire.
   Est. part cost: $0 - $20

Rare But Worth Checking

• Radio Frequency (RF) Interference: Strong RF signals from aftermarket devices, such as cheap phone chargers, dash cams, power inverters, or even non-OEM LED interior lights, can jam the low-power signals from the TPMS sensors and key fobs. TSB PIC5650 specifically calls out this issue. Before replacing parts, unplug all aftermarket accessories and see if the code clears.
• Cleared RCDLR Memory: In rare cases, the RCDLR module can lose its programming data without failing completely. One owner on a forum reported that their TPMS sensors would 'forget' after every ignition cycle until a bi-directional scan tool was used to rewrite the tire type and pressure settings to the module.
• Water Intrusion: The RCDLR is located in the rear of the vehicle, often behind the D-pillar trim. Water leaks from the rear window seal, roof rack, or rear hatch can drip onto the module, causing corrosion and failure. If you find evidence of water stains on the headliner or trim panels in that area, suspect water damage to the RCDLR.

Diagnosis Steps

1. Check for other DTCs. Are there codes for other TPMS sensors (C0750, C0755, C0760)? Are there B-codes for the security system (B3055, etc.)?
2. Test the key fobs. Do the lock, unlock, and remote start functions work? If not, the RCDLR is the primary suspect.
3. Unplug all aftermarket 12V accessories (chargers, dashcams, etc.) to eliminate Radio Frequency Interference as a cause, per TSB PIC5650.
4. If key fobs work, use a TPMS diagnostic tool to try and activate the right rear sensor. If it fails to respond, the sensor is bad.
5. If the RCDLR is suspected, locate it behind the driver's side rear D-pillar trim panel. Visually inspect its coaxial antenna connection per TSB 16-NA-061.
6. With a multimeter, check for 12V power and good ground at the RCDLR's electrical connector. A known issue is a broken power wire in the driver's side door sill area.
7. If wiring and connections are good, the RCDLR is likely faulty and requires replacement and programming.

Parts You'll Likely Need

• Remote Control Door Lock Receiver (RCDLR) (OEM #23445327 (latest), 22889361, 25974714, 15913421) — This module is the most common cause when C0765 is paired with key fob or starting issues. It's a known failure point on this platform.
  Trusted brands: ACDelco, GM Genuine
  OEM price range: $40-$80
  Aftermarket price range: $30-$60
• Tire Pressure Monitoring System (TPMS) Sensor (OEM #13586335 (also listed as 25920615, 15922396, 20923680, 22854866)) — This is the fix when C0765 appears alone and key fobs work correctly. The sensor's internal battery dies over time.
  Trusted brands: ACDelco, Schrader, Dorman, Bosch
  OEM price range: $40-$70
  Aftermarket price range: $25-$50

Related Codes That Often Appear With This One

• C0750, C0755, C0760 — These are the codes for the other three tire pressure sensors. When all four codes appear together, it strongly indicates a failure of the central receiver (RCDLR) rather than four individual sensors failing at once.
• B3055, B3060, B3935 — These are GM-specific body codes related to the vehicle immobilizer and key recognition system. Their presence alongside C0765, as noted in TSB PIC5650, confirms the problem involves the security system and points toward a common cause affecting both systems, such as the RCDLR or RF interference.

Technical Service Bulletins (TSBs) & Recalls

• PIC5650 (multiple revisions, e.g., PIC5650M): Mentions C0765 in a group of codes related to no-start or start/stall concerns with the security light on, frequently caused by Radio Frequency Interference (RFI) from aftermarket accessories.
• 16-NA-061: Describes how a disconnected RCDLR antenna can cause TPMS codes (including C0765), a "Service Tire Monitor System" message, and poor key fob range.
• 16-NA-396: While not specific to the Suburban, this TSB for other GM vehicles confirms the pattern of C0765 appearing with key fob issues due to an internal RCDLR failure, showing a common diagnostic pattern across GM platforms.

Platform-Specific Known Issues

• A known issue, documented in multiple versions of TSB PIC5650, links C0765 with security system codes (B3055, B3060, etc.) and no-start/stall conditions, pointing to a fault that affects both the TPMS and immobilizer systems, often caused by RF interference.
• TSB 16-NA-061 details how disconnected antenna wiring for the RCDLR can cause TPMS codes (including C0765), a "Service Tire Monitor System" message, and poor key fob range, advising technicians to check all connections before replacing the module.
• Owners and technicians have reported finding broken power or data wires for the RCDLR in the wiring harness that runs along the driver's side floor, under the door sill plate. This can cause a 'no communication' issue with the module.

Mechanic-Grade Diagnostic Values

• High Speed GMLAN Bus Resistance — expected: Approximately 60 Ω. Failure: A reading of 120 Ω indicates an open in the bus. A reading significantly lower than 60 Ω indicates the bus wires are shorted together.
• High Speed GMLAN Bus Voltage (Key On) — expected: Pin 6 (CAN High) to Ground: ~2.6V. Pin 14 (CAN Low) to Ground: ~2.4V.. Failure: Voltages significantly pulled down to 1V or less can indicate a faulty module on the network.
• RCDLR Power Supply — expected: 12V (Battery Voltage) at the power pin of the RCDLR connector with key on.. Failure: 0V or low voltage indicates a broken wire or blown fuse, which is a known issue in the driver's side door sill harness.

Hidden / Shadow Codes Worth Checking

• C0765 08: Right Rear Low Tire Pressure Sensor Signal Invalid. This symptom byte indicates the RCDLR is receiving a signal, but the data is corrupt or not in the expected format. (see via GM Tech 2, GDS2, or other professional-grade scan tool that can read manufacturer-specific symptom bytes.)
• C0765 29: Right Rear Tire Pressure Sensor Too Few Pulses. This symptom byte, noted in TSBs for other GM vehicles, points directly to an internal RCDLR fault where it's not receiving the expected number of transmissions. (see via GM Tech 2, GDS2, or other professional-grade scan tool.)
• C0765 00: No Sub Type Information. This indicates a general failure where the sensor has not transmitted for a set period (e.g., 18 minutes) or has a low battery. (see via GM Tech 2, GDS2, or other professional-grade scan tool.)

Scan Tool Commands That Help

• Tech 2: Setup New RCDLR — This function must be performed after replacing the RCDLR module. The path is typically: Body and Accessories > Theft Deterrent > Module Setup > RCDLR. This is followed by the Theft Deterrent System learn procedure and the TPMS sensor learn procedure.
• GDS2: Module Diagnostics -> Remote Control Door Lock Receiver -> Configuration/Reset Functions — Used on later models of the platform for programming and setting up a new RCDLR module. This is required to make the new module communicate with the vehicle's other systems and learn the existing key fobs and TPMS sensors.
• Tech 2 / GDS2: TPM Sensor Learn — This procedure is required after replacing a TPMS sensor or the RCDLR to make the vehicle recognize the sensor IDs in their correct positions.

Wiring & Ground Locations

• RCDLR Module — Behind the driver's side D-pillar (rearmost pillar) interior trim panel on Suburban and Yukon XL models.. This is the central receiver for both TPMS and key fob signals. Physical access is required to test power, ground, and antenna connections before condemning the module.
• G303 — On the left side B-pillar, behind the trim panel.. Service manual information for similar platforms indicates that a ground point in the rear of the vehicle serves the RCDLR. A loose or corroded G303 can cause intermittent or total failure of the RCDLR, mimicking a failed module.
• Driver's Side Sill Plate Harness — In the wiring channel running along the floor under the driver's side front and/or rear door sill plates.. This harness is a known chafe/break point for the power wire supplying the RCDLR. Technicians have found broken wires here causing a 'no communication' condition with the module.

Real Owner Repair Stories

• YouTube channel 'Raymond Beachy' (2011 Chevrolet Silverado (same GMT900 platform)) — No communication with the RCDLR, key fobs not working.
  ❌ Tried (didn't work) Initially assumed the RCDLR module itself was bad and ordered a replacement.
  ✅ What actually fixed it Upon testing before installing the new part, the technician found there was no power and ground at the RCDLR connector. The root cause was a broken wire in the harness, not a failed module.
• Tahoe Yukon Forum user 'Joseph Garcia' (2007 Yukon XL Denali) — Simultaneous TPMS and key fob failure, leading to the assumption the RCDLR was bad.
  ❌ Tried (didn't work) Attempting the TPMS relearn procedure, which would not even get past the first sensor.
  ✅ What actually fixed it The actual cause was a single failed right rear wheel sensor. This was unusual because the symptoms (total TPMS and fob failure) strongly pointed to the RCDLR, but replacing the one sensor resolved all issues.

When the Usual Fixes Don't Work

• In one documented case on a 2007 Yukon XL, the owner experienced all the classic symptoms of a failed RCDLR (all TPMS readings lost, key fobs dead). However, after extensive troubleshooting, the problem was traced back to just the single right rear wheel sensor indicated by the C0765 code. Replacing only that sensor restored all functions, including the key fobs. This is a rare but important counterexample to the 'common knowledge' that these combined symptoms always mean the RCDLR is bad.

OEM Part Supersession History

• 15913421, 25974714, 22889361 → 23445327 — Standard part evolution for improved reliability or manufacturing changes.
  Heads up: While 23445327 is the latest service replacement, some sources indicate it has also been superseded by 13540600 for later model applications. It is critical to verify the correct part number by VIN for the specific vehicle.

Model Year Variations Within This Range

• 2007-2013 vs 2014: The diagnostic software used by dealerships transitioned from Tech2/Tech2Win for models up to 2013, to the GDS2 (Global Diagnostic System 2) for 2014 and newer models. While the RCDLR function is the same, the software and interface (e.g., MDI) required for programming a replacement module differs.