C0750 on 2007-2014 Cadillac Escalade ESV: Left Front TPMS Fault Guide

What's Unique About the 2007-2014 Cadillac ESCALADE ESV

On this GMT900 platform, which includes the Escalade, a TPMS fault like C0750 can sometimes be linked to seemingly unrelated electrical issues. A manufacturer Technical Service Bulletin (TSB) notes that C0750 can appear in conjunction with a no-crank or no-start condition where the security light is illuminated. This highlights the interconnectedness of the TPMS system with the vehicle's main body and security modules, as they all rely on radio frequency signals received by the RCDLR.

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 illuminated on the instrument cluster (may flash for one minute, then stay solid).
• "Service Tire Monitor System" message displayed in 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 a no-start condition and security light, as per TSB PIC5650M.

Most Likely Causes

1. Dead TPMS Sensor Battery 🔴 High Probability → Shop Tire Pressure Monitoring System (TPMS) Sensor The non-replaceable batteries inside the original TPMS sensors have a typical lifespan of 7-10 years. For the 2007-2014 model years, these sensors are now at or beyond their expected service life, making battery failure the most common cause.
   How to confirm: A professional TPMS diagnostic tool can test the sensor's battery level and signal output directly. If the tool cannot get a reading from the sensor, the battery is almost certainly dead. A service manual notes a low battery condition can directly set the code.
   Typical fix: Replace the left front TPMS sensor. The tire must be at least partially unmounted to access it. After replacement, a TPMS relearn procedure must be performed.
   Est. part cost: $25-$75
2. Damaged TPMS Sensor 🟡 Medium Probability → Shop Tire Pressure Monitoring System (TPMS) Sensor Sensors can be easily damaged during tire replacement or repair if the technician is not careful. They are made of plastic and can crack or break.
   How to confirm: Visual inspection of the sensor after dismounting the tire. Look for cracks, breaks, or other physical damage.
   Typical fix: Replace the damaged TPMS sensor and perform the relearn procedure.
   Est. part cost: $25-$75
3. Faulty Remote Control Door Lock Receiver (RCDLR) ⚪ Low Probability → Shop Keyless Entry Receiver While less common for a single code, the RCDLR is the module that receives signals from all TPMS sensors and key fobs. A failure in this module can cause TPMS issues. TSBs for related platforms suggest this is a possible cause when multiple TPMS codes appear and/or key fob range is poor.
   How to confirm: This is typically suspected when multiple TPMS sensors fail simultaneously (C0750, C0755, C0760, C0765) and/or the key fobs stop working intermittently or completely. A forum user with a similar GMT900 vehicle found their RCDLR had lost its memory and needed to be reprogrammed with a bi-directional scan tool.
   Typical fix: Replace the RCDLR module. This requires programming by a dealer or a well-equipped independent shop.
   Est. part cost: $80-$200

Rare But Worth Checking

• Radio Frequency (RF) Interference: Aftermarket electronic devices, such as cell phone chargers, dash cams, power inverters, or even some LED lights, can sometimes emit RF interference that disrupts the 315MHz signal from the TPMS sensor to the RCDLR. TSB PIC5650K explicitly lists these devices as potential causes for TPMS and key fob issues. Before replacing parts, try unplugging all aftermarket accessories to see if the code clears.

Diagnosis Steps

1. Confirm the code C0750 is present using an OBD-II scanner capable of reading Chassis (C) codes.
2. Check the pressure display in the Driver Information Center (DIC). Confirm that the Left Front reading is blank or shows dashes (--).
3. Attempt a TPMS relearn procedure. On these Escalades, this is typically initiated through the DIC vehicle settings. The vehicle will flash the driver's front turn signal. Let air out of the left front tire until the horn chirps, then proceed to the 🎬 Watch: A quick walkthrough of the TPMS relearn procedure. passenger front, passenger rear, and driver's rear, in that order. If the procedure fails to recognize the left front sensor, the sensor is the primary suspect.
4. For a definitive diagnosis, use a dedicated TPMS tool (like an Autel or the GM EL-50448) to attempt to activate the left front sensor. If the tool cannot get a response, the sensor has failed.
5. If the sensor *does* respond to the tool but the vehicle cannot learn it, and especially if other TPMS codes or key fob issues are present, investigate the Remote Control Door Lock Receiver (RCDLR) and its wiring/antenna connections as per TSBs PIT5446A and 16-NA-396.
6. Before replacing any parts, unplug all aftermarket 12V accessories (phone chargers, dash cams, etc.) to rule out Radio Frequency Interference (RFI), a known issue cited in TSB PIC5650K.
7. Once the faulty part is identified, replace it. If replacing a sensor, the tire must be removed from the wheel, or the bead must be broken. Several DIY methods exist using jacks or even a shop vacuum to break the bead without 🎬 See how to replace a sensor without a tire machine. a tire machine.
8. After replacement, perform the TPMS relearn procedure to allow the vehicle to recognize the new sensor ID.
9. Inflate all tires to the pressure specified on the door jamb sticker (typically 35 PSI for this model) and clear the codes.

Parts You'll Likely Need

• Tire Pressure Monitoring System (TPMS) Sensor (OEM #13598771) — This is the most common failure point for code C0750, typically due to the internal battery reaching the end of its 10-year service life. This part number is a direct replacement for many GM vehicles from this era.
  Trusted brands: ACDelco (OEM), Schrader (often the OEM supplier), Standard Motor Products, Huf, Denso
  OEM price range: $40-$75
  Aftermarket price range: $20-$50

Related Codes That Often Appear With This One

• C0755 — Right Front TPMS sensor fault. Often appears with C0750 when sensor batteries are failing around the same time due to age.
• C0760 — Left Rear TPMS sensor fault. Often appears with C0750 when sensor batteries are failing around the same time due to age.
• C0765 — Right Rear TPMS sensor fault. Often appears with C0750 when sensor batteries are failing around the same time due to age.
• B3055 — As noted in TSB PIC5650M, this key-related security code can appear alongside TPMS codes in cases of a no-start or start-stall condition caused by RFI or a faulty RCDLR.

Technical Service Bulletins (TSBs) & Recalls

• PIC5650M (and revisions up to PIC5650K): Addresses an intermittent no crank/no start or stall with security light on, where DTCs including C0750 may be found, often due to RFI.
• 16-NA-396: Details RCDLR failure causing multiple TPMS codes (including C0750) and key fob issues on various GM models.
• PIT5446A: Pertains to slightly newer models but is relevant, describing how a disconnected RCDLR antenna can cause TPMS codes for distant sensors like the left front.

Platform-Specific Known Issues

• A known TSB (PIC5650M, and its later revisions) links C0750 and other TPMS codes to intermittent no-crank, no-start, or start-stall conditions accompanied by a security light. This indicates a potential conflict or failure within the vehicle's security and remote function systems, often caused by Radio Frequency Interference (RFI) from aftermarket accessories.
• The RCDLR antenna connection can become loose or disconnected, leading to TPMS codes for the sensors farthest from the receiver (often the front tires). TSB PIT5446A describes checking the coax cable at the RCDLR, the antenna amplifier module, and the antenna itself, which is located in the right rear quarter glass area.