Accelerator Pedal Sensor Guide for 2003-2006 Chevrolet Suburban 1500
Experiencing 'Reduced Engine Power' or poor acceleration? Your Accelerator Pedal Sensor could be the problem.
- This part is ONLY for 2003-2006 Suburbans with 'drive-by-wire'; older models use a throttle cable and a different sensor.
- The 'Reduced Engine Power' message is the most definitive symptom of a failing sensor or a related wiring issue.
- Before replacing the pedal, always inspect the wiring harness for damage and check for clean, tight ground connections, as this is a common GM problem.
- Replacement is a simple DIY job that usually takes less than 30 minutes with basic tools.
Is This the Right Part for Your Truck?
The 1996-2006 Chevrolet Suburban 1500 spans two different technology generations. It is critical to know which system your truck uses before buying parts. Older 1996-2002 models used a traditional mechanical throttle cable connected to the gas pedal. These trucks do not have an Accelerator Pedal Sensor (APS). Instead, they use a Throttle Position Sensor (TPS) located on the engine's throttle body. Starting in 2003, the Suburban 1500 switched to a standard 'drive-by-wire' system, which uses an APS on the pedal assembly. The most common ordering mistake is buying this part for a truck that uses a throttle cable. Always check if your gas pedal has a sensor with a wiring harness attached or a simple metal cable.
Common Failure Symptoms
When the accelerator pedal sensor starts to fail, your Suburban's computer gets confusing signals. This can cause several noticeable problems, with the most common being the 'Reduced Engine Power' message on your dashboard. This is a safety feature, or 'limp mode', that limits your speed and RPMs to prevent potential accidents from uncontrolled acceleration.
Choosing the Right Aftermarket Part: Dorman vs. Standard Ignition
When replacing your accelerator pedal sensor, you'll find options from brands like Dorman and Standard Ignition (Standard Motor Products). Both offer direct-fit replacements, but there are differences to consider.
- Dorman: Often the most budget-friendly option, Dorman parts are widely available. They are designed as direct replacements and often come with necessary hardware. However, owner reviews can be mixed. Some users report successful, easy installations, while others have experienced premature failures, leading them to purchase an OEM part later. Dorman can be a good choice for a quick, low-cost repair, but be aware of the potential for quality inconsistencies.
- Standard Ignition (SMP): Generally regarded as a higher-tier aftermarket brand, Standard Ignition parts often have a reputation for better quality and reliability, closer to OEM standards. They may come at a slightly higher price point than Dorman but are often preferred by mechanics and owners looking for a more durable, long-term solution.
Pro Tip: Before replacing the sensor, inspect the wiring harness and ground connections. On these GM trucks, frayed wires near the pedal, water intrusion near the kick panel, or a bad ground on the engine block can cause the exact same symptoms as a failed sensor. Many owners have replaced the sensor only to find the real problem was a simple wiring issue.
🎬 See how to diagnose and fix common P2138 wiring faults.Cost of Replacement
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Dorman, Standard, etc.) | $38.95 - $207.99 |
| New OEM | $120 - $200 |
| Shop Labor | $75 - $150 |
Frequently Asked Questions (FAQ)
What is the difference between an Accelerator Pedal Sensor and a Throttle Position Sensor?
They work together in a drive-by-wire system. The Accelerator Pedal Sensor (APS) is on your gas pedal and reads your foot's input. The Throttle Position Sensor (TPS) is on the throttle body on the engine and confirms the throttle blade's actual position. A fault in either can cause similar symptoms, but the diagnostic trouble codes are usually different and can help pinpoint the problem.
Is there a recall for the accelerator pedal sensor on my Suburban?
There are no specific NHTSA safety recalls for the accelerator pedal sensor itself on the 2003-2006 Suburban 1500. However, GM has issued Technical Service Bulletins (TSBs) for related issues like code P2138 and reduced engine power, which indicates they are aware of potential problems with the system.
Can I replace just the sensor or do I need the whole pedal assembly?
Most aftermarket brands sell the complete pedal assembly with the sensor pre-installed. 🎬 Watch this step-by-step walkthrough of the pedal assembly replacement. This is the recommended approach because it ensures all components are new and matched. Attempting to replace only the sensor can be difficult and may not be possible if the original is integrated into the pedal assembly.
Does the new sensor need to be calibrated?
A specific scan tool recalibration is not always required. However, a reset procedure is good practice. After installing the new pedal and reconnecting the battery, turn the ignition to the 'ON' position (without starting the engine) for about 15 seconds. Then turn it off. This allows the computer to learn the new sensor's voltage range.
🎬 Watch a professional demonstration of the electronic throttle relearn procedure.Helpful Videos
Technical Specifications
OEM Part Numbers: 15107594 15149451 15831357
The sensor is part of the complete accelerator pedal assembly. It uses two internal potentiometers to send two separate voltage signals to the engine computer to verify pedal position. The assembly connects via a single electrical connector, typically with 6 or 9 pins depending on options like adjustable pedals.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Chevrolet Suburban 1500: