C0750 on 2015-2022 Chevrolet Suburban: TPMS Faults, Causes, and Fixes

What's Unique About the 2015-2022 Chevrolet SUBURBAN

On these Suburbans and their platform-mates (Tahoe, Yukon, Escalade), the TPMS sensors communicate with the Remote Control Door Lock Receiver (RCDLR), the same module that receives signals from your key fob. This integration means a fault within the RCDLR, its antenna, or even its programming can cause not only TPMS codes like C0750 but also issues with keyless entry and no-start conditions, as documented in multiple GM Technical Service Bulletins. Therefore, if you experience key fob problems alongside the TPMS light, the RCDLR module itself or its antenna system is a likely culprit.

Diagnostic Flowchart

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

Generation note: This range covers two Suburban generations: the 11th (2015-2020, K2XX platform) and the 12th (2021-2022, T1XX platform). The fundamental TPMS architecture, where sensors report to a central receiver (RCDLR/BCM), is consistent across both. The causes and diagnostic principles described here apply to both generations and their platform-mates like the Tahoe, Yukon, and Escalade. A key difference is the TPMS sensor frequency: 2015-2018 models use 315 MHz, 2020 and newer use 433 MHz, and 2019 is a transitional year that could have either.

Symptoms You May Notice

• TPMS warning light illuminated on the instrument cluster (often flashes for 60 seconds on startup before going solid)
• "Service Tire Monitor System" message on the Driver Information Center (DIC)
• The pressure reading for the left front tire shows as dashes ("--") on the DIC
• Inability to complete a TPMS relearn procedure; sometimes causes all tire readings to show dashes if one sensor fails to respond
• Intermittent "No Remote Detected" message if the RCDLR module is the root cause
• Keyless entry or remote start may work intermittently or not at all
• In rare cases associated with a failing RCDLR, a no-start or start-and-stall condition may occur. [⭐ MANUFACTURER TSB — highest authority] Bulletin #PIC5650M

Most Likely Causes

1. Dead or Failing TPMS Sensor Battery 🔴 High Probability → Shop Tire Pressure Monitoring System (TPMS) Sensor TPMS sensors use sealed, non-replaceable batteries with a finite lifespan, typically 7-10 years. Vehicles from the earlier part of this year range are now reaching the end of that expected battery life.
   How to confirm: Use a TPMS diagnostic tool (like a J-46079 or equivalent) to attempt to activate the sensor. 🎬 Watch this video to see how to test a failing sensor. If the tool cannot get a response, the sensor's battery is almost certainly dead. A professional scan tool can also sometimes read the battery status directly from the BCM data or show a specific DTC symptom byte for low voltage.
   Typical fix: Replace the left front TPMS sensor. The tire must be dismounted from the wheel to perform the replacement, followed by a TPMS relearn procedure.
   Est. part cost: $25-$75
2. Faulty Remote Control Door Lock Receiver (RCDLR) 🟡 Medium Probability → Shop Keyless Entry Receiver GM has issued service bulletins (e.g., #16-NA-396) for internal RCDLR failures on various models, which can cause a loss of communication with both TPMS sensors and key fobs. This can sometimes be triggered by environmental factors like heavy rain, as noted in owner forums.
   How to confirm: This is a likely cause if multiple TPMS codes (C0750, C0755, C0760, C0765) are present simultaneously, and/or you are also experiencing intermittent issues with your key fobs (remote lock/unlock, push-to-start).
   Typical fix: Replace the Remote Control Door Lock Receiver module. This requires programming by a dealer or a properly equipped independent shop using the GM Service Programming System (SPS).
   Est. part cost: $60-$150
3. RCDLR Antenna or Coaxial Cable Fault ⚪ Low Probability As noted in TSBs #PIT5446A and #16-NA-061, the antenna system for the RCDLR can be a point of failure, leading to poor signal reception. The coaxial cable can become disconnected at the RCDLR module, at the antenna amplifier, or at the rear glass antenna itself.
   How to confirm: Visually inspect the RCDLR antenna and its coaxial cable for looseness, corrosion, or damage. TSB #16-NA-061 notes that a disconnect at the amplifier may only cause the farthest sensors (like the LF) to drop out, while a disconnect at the RCDLR will cause all sensors to fail. Check for continuity (near 0 ohms) on the disconnected coax cable from center pin to center pin.
   Typical fix: Secure any loose connections. If the cable is damaged, it should be replaced, as repairs on coaxial cables are not recommended. The repair may involve accessing trim panels in the rear cargo area to trace the cable.
   Est. part cost: $20-$50
4. Faulty TPMS Sensor (Internal Failure) ⚪ Low Probability → Shop Tire Pressure Monitoring System (TPMS) Sensor Sensors can fail from physical damage during tire service or from internal electronic faults, though this is less common than battery failure.
   How to confirm: If a TPMS tool can read the sensor but the data is erratic, or if it fails intermittently, the sensor itself has likely failed.
   Typical fix: Replace the left front TPMS sensor.
   Est. part cost: $25-$75

Rare But Worth Checking

• Radio Frequency (RF) Interference: Aftermarket electronic devices, such as cell phone chargers, dash cams, or power inverters plugged into the vehicle's outlets, can sometimes emit RF noise that interferes with the TPMS signal. Before replacing parts, try unplugging all aftermarket accessories to see if the connection is restored. A scan tool's sensor 'Hit Rate' data can help confirm interference if the success rate of reception is low.
• RCDLR Memory Corruption: In some instances, the RCDLR module can lose its programming for tire type and pressure settings, causing it to 'forget' the learned sensors after an ignition cycle. An owner on a forum resolved this by using a bidirectional scan tool to rewrite the correct tire parameters (e.g., P-metric, 36psi) back into the module.
• Body Control Module (BCM) Fault: While it is the module that ultimately reports the code, a BCM failure is very rare. All other possibilities, especially the sensor and RCDLR, should be thoroughly ruled out before considering BCM replacement.

Diagnosis Steps

1. Use a TPMS activation tool to attempt to read the sensor at the left front wheel.
2. If the tool gets no response, the sensor battery is dead or the sensor has failed. The sensor needs to be replaced.
3. If the tool reads the sensor successfully, check for any other TPMS codes (C0755, C0760, C0765) or key fob-related codes (B-codes).
4. If multiple TPMS codes or key fob issues are present, inspect the Remote Control Door Lock Receiver (RCDLR) and its antenna connections for damage or corrosion, as recommended by TSBs #PIT5446A and #16-NA-061. The RCDLR is located behind the trim on the right rear C-pillar.
5. Attempt a TPMS relearn procedure as described in the owner's manual. If the relearn fails specifically at the left front wheel, it further points to a bad sensor. Note that a failure during this process may cause all tire pressures to display as dashes until fixed.
6. Check for sources of radio frequency interference by unplugging all aftermarket accessories and re-testing.
7. If all sensors are new and the RCDLR and its antenna appear fine, the RCDLR module itself may be faulty and require replacement, as per TSB #16-NA-396.
8. If sensors learn but are forgotten on the next key cycle, investigate using a bidirectional scan tool to check and rewrite the RCDLR's tire type and pressure configuration.

Parts You'll Likely Need

• Tire Pressure Monitoring System (TPMS) Sensor (OEM #13598771 (Superseded by 13540600)) — This is the most common failure point. The internal battery dies, requiring the replacement of the entire sealed sensor unit. Part number 13598771 has been replaced by 13540600.
  Trusted brands: ACDelco (OEM), Schrader, Standard Motor Products, HUF
  OEM price range: $40-$70
  Aftermarket price range: $25-$50
• Remote Control Door Lock Receiver (RCDLR) (OEM #13595511 (Superseded by 13540045)) — This module can fail internally, causing communication loss with multiple TPMS sensors and the key fobs, as documented in GM service bulletin 16-NA-396. Part number 13595511 has been superseded by 13540045.
  Trusted brands: ACDelco (OEM)
  OEM price range: $60-$150
  Aftermarket price range: $50-$120

Related Codes That Often Appear With This One

• C0755, C0760, C0765 — If these codes for the other three wheels appear with C0750, it strongly suggests a central system problem, such as a faulty RCDLR or its antenna, rather than four individual sensors failing at once.
• B3055, B3060, B3935 — These codes relate to the vehicle's immobilizer and key systems. Their presence alongside C0750 points toward a fault in the RCDLR, which handles both TPMS and security functions, as noted in TSB #PIC5650M. [⭐ MANUFACTURER TSB — highest authority] Bulletin #PIC5650M

Technical Service Bulletins (TSBs) & Recalls

• PIC5650M: Links intermittent no-start/stall conditions with security codes (B3055, etc.) and a full set of TPMS codes (C0750, C0755, etc.), pointing to a central module issue.
• PIT5446A: The original TSB mentioned in pass 1, advising inspection of the RCDLR antenna system before part replacement.
• 16-NA-061: A detailed bulletin explaining that poor RKE range and TPMS codes are often caused by disconnected coax cables for the RCDLR antenna. It specifies that a disconnect far from the module may only affect one or two sensors, while a disconnect at the module will cause all to fail.
• 16-NA-396: Explicitly states that intermittent key fob operation, 'No Remote Detected' messages, and multiple TPMS codes can be caused by an internal failure of the RCDLR, with the fix being module replacement.

Platform-Specific Known Issues

• TSB #PIT5446A specifically advises technicians to inspect the RCDLR antenna system before replacing other parts for TPMS codes on 2015 models.
• TSB #16-NA-061 provides a detailed diagnostic guide for the RCDLR antenna system, noting that a loose coax cable at the antenna amplifier (in the rear quarter panel area) can cause intermittent failure of the sensors furthest away, such as the left front (C0750).

Mechanic-Grade Diagnostic Values

• TPMS Sensor Operating Frequency — expected: 315 MHz for 2015-2018 models; 433 MHz for 2020-2022 models; 2019 can be either.. Failure: Using the wrong frequency sensor will result in no communication and a C-code.
• TPMS Sensor Activation Frequency — expected: 125 kHz. Failure: A TPMS tool uses this low frequency to 'wake up' the sensor before it transmits data.
• RCDLR Coaxial Antenna Cable Continuity — expected: Near 0 Ω (Ohms) between the center pins on either end of the disconnected cable.. Failure: High or infinite resistance indicates a broken cable requiring replacement.

Hidden / Shadow Codes Worth Checking

• C0750 :29: Too Few Pulses. This indicates the RCDLR is not receiving the expected number of data packets from the sensor, a hallmark of an internal RCDLR failure or significant interference. (see via GM GDS2 (Global Diagnostic System 2) or a high-end professional scan tool capable of reading manufacturer symptom codes.)
• C0750 :03: Low Voltage. This often points directly to a dying battery within the TPMS sensor itself. (see via GM GDS2 or a compatible high-end professional scan tool.)

Scan Tool Commands That Help

• GM GDS2 / High-End Scan Tool: RCDLR Module Replacement/Setup — This function is required after replacing the RCDLR module. It programs the new module to the vehicle's BCM and security system using the GM Service Programming System (SPS).
• GM GDS2 / High-End Scan Tool: TPMS Sensor Hit Rate — When diagnosing intermittent signal loss or suspected RF interference. A low 'Hit Rate' percentage confirms the RCDLR is struggling to receive the sensor's signal, even if the sensor is transmitting correctly.

Wiring & Ground Locations

• RCDLR Module — Behind the interior trim panel on the right-hand (passenger side) rear C-pillar.. This is the central receiver for all TPMS signals. Access is required for replacement or to check its coaxial antenna connection.
• RCDLR Antenna System — Consists of a coaxial cable running from the RCDLR to an antenna amplifier, which then connects to the antenna grid in the right rear quarter glass.. A disconnect at any of the three points (RCDLR, amplifier, glass) can cause TPMS codes. A disconnect at the amplifier may only affect the farthest sensors, like the Left Front (C0750).
• G103 — On the cowl at the left rear of the engine compartment, typically above the brake booster.. This ground point serves multiple components, including the Body Control Module (BCM) and the Remote Control Door Lock Receiver (RCDLR). A poor connection here can cause a wide range of difficult-to-diagnose electrical issues, including TPMS faults.

Real Owner Repair Stories

• YouTube channel 'Pine Hollow Auto Diagnostics' (2017 GM Truck (similar platform)) — Keyless entry not working and 'Service TPMS System' message on the dash with multiple TPMS codes.
  ❌ Tried (didn't work) Initial diagnosis pointed towards a faulty RCDLR module based on common failures.
  ✅ What actually fixed it The technician found a broken signal wire under the driver's door rocker panel / sill plate. The wire had been chafed or cut by the plastic molding. Splicing the broken wire restored function to both the key fobs and the TPMS system.
• Chevrolet Forum user 'Gio0123' (2018 Chevrolet Suburban) — TPMS light came on at the same time the key fob stopped working.
  ❌ Tried (didn't work) The owner purchased a new RCDLR module but could not locate it on the vehicle to replace it.
  ✅ What actually fixed it A forum moderator confirmed the RCDLR location is on the 'right rear passenger compartment on c pillar', enabling the owner to proceed with the repair. This confirms the physical location for diagnosis.

"I Checked Everything" — The Actual Cause

• A classic scenario described in GM TSB #16-NA-061 involves a technician trying to diagnose a single sensor code like C0750. A TPMS tool may not be able to activate the sensor, leading the tech to believe the sensor is bad. However, the actual cause can be the coaxial cable being disconnected at the antenna amplifier module. This weak signal is enough for the RCDLR to still receive data from the closest sensor (Right Rear) but not the farthest (Left Front), mimicking a single sensor failure when it's actually a central system wiring issue.

OEM Part Supersession History

• 13598771 → 13540600 — Standard part evolution and consolidation by GM.
  Heads up: These parts are generally cross-compatible, but it is critical to match the operating frequency (315 MHz or 433 MHz) to the vehicle's model year.
• 13595511 → 13540045 — Updated part from GM to address internal failures noted in TSBs like 16-NA-396.
  Heads up: The replacement part is a direct fit but requires programming to the vehicle with GM's Service Programming System (SPS) after installation.

Model Year Variations Within This Range

• 2015-2018: These models use a 315 MHz frequency for the TPMS sensors.
• 2019: This is a transitional year. The vehicle could have either 315 MHz or 433 MHz sensors. A TPMS tool must be used to verify the frequency before ordering replacement parts.
• 2020-2022: These models use a 433 MHz frequency for the TPMS sensors.