C0750 on 2007-2014 Chevrolet Suburban: Causes and Fixes for the TPMS Fault

What's Unique About the 2007-2014 Chevrolet SUBURBAN

On this generation of GM trucks (GMT900 platform), the Tire Pressure Monitoring System (TPMS) is linked to the Remote Control Door Lock Receiver (RCDLR). This single module processes signals from both the 315 MHz tire sensors and your key fob. Because of this shared module, a failing TPMS sensor or a faulty RCDLR can sometimes cause seemingly unrelated issues, such as intermittent key fob operation or, in rare cases documented by GM, a no-start condition with a security light, as noted in TSB #PIC5650M.

Diagnostic Flowchart

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

Symptoms You May Notice

• TPMS warning light flashing for about a minute, then staying on solid after starting the vehicle.
• "Service Tire Monitor System" message displayed on the Driver Information Center (DIC).
• The pressure reading for the left front tire shows as dashes ("--") on the DIC.
• In rare cases, may be associated with intermittent key fob issues (poor range, "No Remote Detected" message) or a no-start condition with the security light on.

Most Likely Causes

1. Dead battery in the TPMS sensor 🔴 High Probability → Shop Tire Pressure Monitoring System (TPMS) Sensor TPMS sensor batteries are not rechargeable and have a finite lifespan, typically 5-10 years. Vehicles in this 2007-2014 year range are at or beyond the typical battery life expectancy. The BCM will set a fault code for a low battery condition.
   How to confirm: Use a TPMS diagnostic tool (like an Autel TS501 or similar) to attempt to read the sensor. If the tool cannot get a signal, shows a 'low battery' status, or fails to trigger the sensor, the battery is dead and the sensor has failed. A scan tool may show C0750 with a sub-code for 'Low Voltage'. A scan tool can also be used to check the sensor battery condition in the RCDLR data list.
   Typical fix: Replace the left front TPMS sensor and perform the TPMS relearn procedure. Many owners recommend replacing all four sensors at once if they are original, as the others are likely to fail soon.
   Est. part cost: $30-$80
2. Failed TPMS Sensor (Internal Fault) 🔴 High Probability → Shop Tire Pressure Monitoring System (TPMS) Sensor Sensors are electronic components located in a harsh wheel environment and can fail from age, vibration, or internal corrosion. A scan tool may show C0750 with a sub-code for 'Internal Malfunction' or 'Too Few Pulses'.
   How to confirm: If a TPMS tool cannot activate the sensor or if the sensor fails to learn during the relearn procedure (and the battery is known to be good), it is considered faulty.
   Typical fix: Replace the left front TPMS sensor and perform the relearn procedure.
   Est. part cost: $30-$80
3. Physical Damage to the Sensor ⚪ Low Probability Sensors can be broken during tire mounting/dismounting if the technician is not careful. They can also be damaged by hitting a large pothole or curb.
   How to confirm: Visual inspection of the sensor after dismounting the tire from the wheel. The sensor body may be cracked or the valve stem may be broken.
   Typical fix: Replace the damaged TPMS sensor.
   Est. part cost: $30-$80

Rare But Worth Checking

• Faulty Remote Control Door Lock Receiver (RCDLR): → Shop Keyless Entry Receiver This is a rare cause, but worth considering if a new sensor cannot be programmed or if you also have intermittent problems with your key fobs. TSB 16-NA-396 notes that an internal RCDLR fault can cause all four TPMS codes (C0750, C0755, C0760, C0765) to set. The replacement part number for the receiver is often 13595511. TSB 16-NA-061 also points to disconnected antenna connections to the RCDLR as a cause for these symptoms. TSB PI1085A specifically calls out replacing the RCDLR (P/N 20863945) on 2012-2013 Suburbans if key fob range is poor and TPMS codes are present.
• Radio Frequency (RF) Interference: Aftermarket electronic devices like dash cams, phone chargers, or even aftermarket LED lights can sometimes interfere with the 315 MHz TPMS signal. This is unlikely to affect only one sensor consistently but is a possibility. TSB PIC5650M details how to diagnose RFI from aftermarket accessories.

Diagnosis Steps

1. Verify code C0750 is present with a scanner capable of reading Chassis (C) codes.
2. Check the tire pressure display in the Driver Information Center (DIC). Confirm the Left Front reading is blank or shows dashes ("--").
3. Attempt a TPMS relearn procedure to confirm the fault. On these Suburbans, this is typically done by putting the vehicle in learn mode by holding the lock/unlock buttons on the key fob for ~5 seconds until the horn chirps twice. Alternatively, use the DIC menu to find the 'Tire Learn' option.
4. Once in learn mode, use a TPMS activation tool (like an EL-50448 or Autel) starting with the left front tire. Hold the tool against the sidewall near the valve stem and press the button. The horn should chirp once to confirm.
5. If the horn does not chirp for the left front tire but does for the others (RF, RR, LR in that order), the LF sensor is confirmed bad.
6. If the sensor activates with the tool but the vehicle does not recognize it, or if multiple sensors are acting up along with key fob issues, investigate the RCDLR module and its antenna connections per TSB 16-NA-061.
7. If the sensor is confirmed bad, have a tire shop dismount the tire, replace the TPMS sensor, remount and balance the tire, and perform the TPMS relearn procedure.

Parts You'll Likely Need

• Tire Pressure Monitoring System (TPMS) Sensor (OEM #20923680, 13586335, 13598771) — This is the component that fails, usually due to an expired internal battery. It is the direct cause of code C0750. The original part number 20923680 has been superseded by numbers like 13586335 and 13598771. Always verify the 315 MHz frequency for this vehicle generation.
  Trusted brands: ACDelco (GM Genuine), Schrader (Often the OEM supplier), Standard Motor Products, Autel (programmable), ITM
  OEM price range: $50-$80
  Aftermarket price range: $30-$60

Related Codes That Often Appear With This One

• C0755 — Right Front TPMS Sensor fault. Often seen with C0750 if sensors are original and failing due to age.
• C0760 — Left Rear TPMS Sensor fault. Often seen with C0750 if sensors are original and failing due to age.
• C0765 — Right Rear TPMS Sensor fault. Often seen with C0750 if sensors are original and failing due to age.
• B3055 — As per TSB #PIC5650M, this key-related code can appear alongside TPMS codes in rare instances of a no-start condition linked to the security system and RFI.

Technical Service Bulletins (TSBs) & Recalls

• PIC5650M: Addresses an intermittent no crank, no start, or start stall concern with the security light, which may be accompanied by DTC C0750, often linked to RFI.
• 16-NA-396: Describes intermittent key fob and passive entry issues, along with TPMS codes including C0750, caused by an internal fault in the Remote Control Door Lock Receiver.
• 16-NA-061: Details diagnosis for TPMS and RKE (key fob) issues caused by poor or disconnected antenna wiring to the RCDLR module.
• PI1085A: Recommends replacing the RCDLR on 2012-2013 models if key fob range is poor and TPMS codes are set.

Platform-Specific Known Issues

• TSB #PIC5650M (and its revisions like PIC5650K) documents a rare link between TPMS codes like C0750 and intermittent no-start or stalling conditions accompanied by a security light, often caused by Radio Frequency Interference (RFI) from aftermarket accessories.
• TSB #16-NA-396 indicates that a faulty Remote Control Door Lock Receiver (RCDLR) can cause TPMS codes along with key fob and passive entry system malfunctions. The fix is to replace the RCDLR module (P/N may vary, one example is 13595511).
• TSB #16-NA-061 details how a poor or disconnected antenna connection for the RCDLR can also cause TPMS codes and key fob issues, as the antenna is shared. It advises checking connections at the RCDLR, antenna amplifier, and rear glass antenna before replacing parts.
• TSB #PI1085A specifically covers 2012-2013 Suburbans where poor key fob range and TPMS codes (including C0750) can be fixed by replacing the RCDLR with part number 20863945.

Mechanic-Grade Diagnostic Values

• TPMS Sensor Signal Frequency — expected: 315 MHz. Failure: No signal or incorrect frequency.
• TPMS Sensor Nut Torque — expected: 35 in-lbs (4 Nm) for clamp-in style. Failure: Incorrect torque can lead to air leaks or sensor damage.
• TPMS Valve Core Torque — expected: 3.5 in-lbs (0.4 Nm). Failure: Incorrect torque can cause slow leaks.

Hidden / Shadow Codes Worth Checking

• C0750 03: Voltage Below Threshold. This indicates the BCM has detected that the sensor's internal battery voltage is too low for reliable operation. (see via A GM-specific scan tool like a Tech2 or high-end aftermarket scanner capable of reading BCM symptom bytes.)
• C0750 29: Too Few Pulses. This means the RCDLR is not receiving the complete data transmission from the sensor, indicating a communication failure. (see via A GM-specific scan tool. This sub-code is specifically mentioned in TSB 16-NA-396 as being associated with RCDLR failure.)
• C0750 08: Bus Signal/Message Failure. This indicates a communication breakdown on the data bus between modules, which could point to a wiring or module issue rather than just the sensor. (see via A GM-specific scan tool capable of reading BCM symptom bytes.)

Scan Tool Commands That Help

• GM Tech2 / GDS2: RCDLR Data List — To check the reported battery status of each individual TPMS sensor without using a separate TPMS tool. A 'Low Battery' status confirms the sensor needs replacement.
• GM Tech2 / GDS2: Tire Pressure Sensor Learn — This is the dealer-level command to initiate the TPMS relearn procedure after replacing a sensor or rotating tires. It serves the same function as the key fob or DIC method but is performed through the scan tool.
• GM Tech2 / GDS2: Special Functions -> TPM Special Tool — This function allows the technician to use the scan tool in conjunction with a TPMS activation tool to manually read and verify the sensor ID and pressure from each tire, then compare it to what the RCDLR is reporting. A mismatch can indicate an RCDLR fault.

Wiring & Ground Locations

• Remote Control Door Lock Receiver (RCDLR) — On 2007-2014 Suburbans and other GMT900 SUVs, the RCDLR is typically located in the headliner, above the rear cargo area, often near the center high-mount stop lamp or attached to the roof cross-member.. The RCDLR is the module that receives the signal from the TPMS sensors. A fault in this module, its wiring, or its antenna connection can mimic a failed sensor and cause C0750.
• G303 — Located on the left (driver's side) B-pillar, behind the trim panel.. This is a major body ground point. While not directly cited for the RCDLR in all diagrams, poor body grounds can cause a wide range of difficult-to-diagnose electronic issues, including module communication problems.
• G103 — Located on the cowl in the left rear of the engine compartment, typically above the brake booster.. This ground point serves multiple critical modules, including the BCM, Instrument Panel Cluster (IPC), and the RCDLR itself. A corroded or loose G103 is a known cause for various electronic gremlins on GM trucks.

Real Owner Repair Stories

• gm-trucks.com forum user (2011 Chevrolet Silverado (GMT900 platform, similar to Suburban)) — Key fobs would not work, no communication with the RCDLR module using a scan tool.
  ❌ Tried (didn't work) Checking the DSM fuse (#25) in the instrument panel fuse block, which was found to be good.
  ✅ What actually fixed it The user discovered a broken power wire leading to the RCDLR module. After repairing the broken wire, communication was restored, and the key fobs and (by extension) the TPMS system began working again. This highlights that wiring failure, not just component failure, can be the root cause.

When the Usual Fixes Don't Work

• While a dead sensor battery is the most frequent cause of C0750, it should not be the only diagnosis. If key fob issues are also present, the problem is more likely related to the shared Remote Control Door Lock Receiver (RCDLR) or its antenna wiring. TSBs 16-NA-396 and 16-NA-061 confirm that a faulty RCDLR or a simple disconnected antenna wire can set all four TPMS codes simultaneously. In these cases, replacing the TPMS sensor will not fix the problem.

OEM Part Supersession History

• 20923680 → 13586335, 13598771, 22853741, 25920615 — Standard part evolution for improved reliability or manufacturing changes.
  Heads up: While these part numbers are generally interchangeable for 2007-2014 Suburbans, it is critical to ensure the sensor operates at 315 MHz. Aftermarket programmable sensors are also a viable option but must be programmed for the specific vehicle.
• N/A (RCDLR for 2012-2013 models) → 20863945 (as per TSB) — To correct a known issue with poor remote transmitter range and associated TPMS faults.
  Heads up: TSB PI1085A specifically calls for this part number (20863945) to fix the issue on affected 2012-2013 Suburbans. Using a different RCDLR may not resolve the specific problem.

Model Year Variations Within This Range

• 2007: TPMS was not standard on all early 2007 models but became standard in the 2008 model year due to the TREAD Act. Some 2007 Suburbans may not have a TPMS system at all. Additionally, some early 2007 models built before October 2006 may use different parts than later models.
• 2012-2013: These model years are specifically called out in TSB PI1085A for issues with poor key fob range and TPMS codes that are resolved by replacing the RCDLR module with a specific part number (20863945).