2009 Silverado WT Cruise Control Upgrade And Troubleshooting Guide
Cruise control is a valuable feature in modern vehicles, especially for long drives, as it helps maintain a constant speed and reduces driver fatigue. However, the 2009 Chevrolet Silverado WT (Work Truck) model sometimes presents a unique challenge: the absence of factory-installed cruise control. This can be frustrating for owners who desire this convenience. In this comprehensive guide, we will explore the reasons why a 2009 Silverado WT might not have cruise control, delve into potential solutions for adding or restoring this functionality, and address common issues and troubleshooting steps. We'll examine the intricacies of the Silverado's electrical system, the role of the BCM (Body Control Module), and aftermarket options available to enhance your driving experience. This guide aims to equip you with the knowledge and resources necessary to tackle the cruise control conundrum in your 2009 Silverado WT.
Why Doesn't My 2009 Silverado WT Have Cruise Control?
The absence of cruise control in a 2009 Silverado WT often comes down to the vehicle's original configuration and trim level. The WT trim is designed as a basic work truck, focusing on functionality and affordability. As a result, certain comfort and convenience features like cruise control are frequently omitted as standard equipment to keep the base price competitive. Automakers offer various trim levels, each with a different set of standard and optional features. Understanding the distinctions between these trims is crucial in grasping why your specific Silverado WT might lack cruise control.
Trim Levels and Optional Features
The 2009 Silverado came in several trims, including the WT, LS, LT, and LTZ. The WT trim, being the entry-level version, typically had the fewest standard features. Cruise control was often an optional add-on, meaning buyers had to specifically request it when purchasing the vehicle. If the original owner did not opt for this feature, the truck would be delivered without it. In contrast, higher trims like the LT and LTZ usually included cruise control as a standard feature or offered it as part of a package deal. Examining the original window sticker (Monroney label) or the vehicle's build sheet can provide definitive confirmation of the factory-installed options. These documents list all the features and packages included when the truck was initially sold. If cruise control is not listed, it was likely not installed at the factory.
Cost Considerations
The decision to omit cruise control from the WT trim was primarily driven by cost considerations. By excluding features like cruise control, manufacturers could offer a more affordable base model, appealing to budget-conscious buyers and fleet customers. These customers often prioritize functionality over comfort features, viewing the vehicle as a tool for work rather than a luxury vehicle. Adding cruise control as standard equipment would have increased the vehicle's price, potentially making it less attractive to the target market for the WT trim. Understanding these market dynamics helps explain why cruise control was often an optional rather than standard feature.
Identifying if Cruise Control Was Ever Installed
Before exploring solutions for adding cruise control, it's essential to confirm whether the vehicle was ever equipped with it. A quick visual inspection of the steering wheel is the first step. If there are no cruise control buttons (typically located on the steering wheel spokes), it's a strong indication that the vehicle did not come with the feature. However, the absence of buttons doesn't always tell the whole story. Sometimes, the wiring and other necessary components are present, but the steering wheel and software need to be updated. Checking the vehicle's RPO (Regular Production Option) codes can provide further insight. These codes are three-character alphanumeric codes that detail all the options and equipment installed at the factory. The RPO code for cruise control may vary, but a dealership or online database can help decode the VIN and identify whether cruise control was originally part of the vehicle's configuration. If the RPO code indicates cruise control, further troubleshooting is needed to determine why it is not functioning.
Potential Solutions for Adding Cruise Control
If your 2009 Silverado WT does not have cruise control, there are several avenues to explore for adding this functionality. The best approach depends on your budget, technical expertise, and the desired level of integration with the vehicle's systems. Options range from installing a factory cruise control system to opting for aftermarket solutions. Each approach has its pros and cons, which we will examine in detail below.
Installing a Factory Cruise Control System
Adding a factory cruise control system involves sourcing the original equipment components and installing them in your Silverado. This approach typically provides the most seamless integration, as the system is designed to work with the vehicle's existing electronics and software. However, it can also be the most expensive and labor-intensive option. The necessary components usually include a steering wheel with cruise control buttons, a cruise control servo (which controls the throttle), wiring harnesses, and possibly a new BCM (Body Control Module) or a software update to the existing BCM. Sourcing these parts can be done through dealerships, online retailers, or salvage yards. Purchasing used parts from a salvage yard can significantly reduce costs, but it's essential to ensure the parts are in good working condition.
Steps for Installation
The installation process typically involves removing the existing steering wheel and replacing it with one that has cruise control buttons. This requires disconnecting the battery and carefully removing the airbag to avoid accidental deployment. The cruise control servo is usually mounted in the engine compartment and connected to the throttle linkage or electronic throttle control system. Wiring harnesses must be routed and connected to the BCM and servo. Depending on the vehicle's original configuration, additional wiring may be needed. Once the hardware is installed, the BCM may need to be programmed or reflashed to recognize the cruise control system. This often requires specialized diagnostic tools and software, which may necessitate a visit to a dealership or a qualified mechanic. The complexity of this process underscores the importance of having a detailed service manual and a thorough understanding of the vehicle's electrical system before attempting the installation.
Aftermarket Cruise Control Kits
Aftermarket cruise control kits offer a more straightforward solution for adding cruise control to your 2009 Silverado WT. These kits are designed to be universal or vehicle-specific and typically include all the necessary components, such as a cruise control module, wiring harnesses, and a control switch or stalk. Aftermarket kits vary in price and features, with some offering advanced functionalities like speed limiting and resume/decelerate functions. The primary advantage of aftermarket kits is their relative ease of installation compared to a full factory system. Most kits come with detailed instructions, and some are designed for plug-and-play installation, minimizing the need for extensive wiring modifications.
Types of Aftermarket Kits
There are two main types of aftermarket cruise control kits: electronic and cable-driven. Electronic kits are more common in modern vehicles and connect directly to the vehicle's electronic throttle control system. These kits typically offer better performance and smoother operation. Cable-driven kits, on the other hand, use a mechanical cable to control the throttle. They are generally less expensive but may not be as precise or reliable as electronic kits. When choosing an aftermarket kit, it's crucial to select one that is compatible with your vehicle's make, model, and engine type. Reading reviews and seeking recommendations from other Silverado owners can help ensure you choose a reputable and reliable kit.
Potential Issues and Considerations
Regardless of whether you opt for a factory or aftermarket cruise control system, there are several potential issues and considerations to keep in mind. Compatibility is a key factor. Not all vehicles are pre-wired for cruise control, even if they don't have the feature installed. In such cases, additional wiring and modifications may be required, increasing the complexity and cost of the installation. The BCM plays a crucial role in cruise control operation, and if it is not compatible or properly programmed, the system may not function correctly. Aftermarket kits may also have compatibility issues, particularly with certain engine types or vehicle configurations. It's essential to thoroughly research and confirm compatibility before purchasing any kit.
Troubleshooting Common Cruise Control Problems
Even if your 2009 Silverado WT is equipped with cruise control, you may encounter issues that prevent it from functioning correctly. Common problems range from simple fixes like a blown fuse to more complex issues involving the BCM or the cruise control servo. Troubleshooting these problems requires a systematic approach, starting with the most straightforward solutions and progressing to more advanced diagnostics.
Common Issues and Diagnostic Steps
Blown Fuse
The first step in troubleshooting any electrical issue is to check the fuses. A blown fuse is a common cause of cruise control malfunction and is a relatively easy fix. Locate the fuse box (usually under the hood or in the passenger compartment) and identify the fuse for the cruise control system. Consult the owner's manual for the fuse layout and amperage rating. If the fuse is blown, replace it with a new one of the same rating. If the fuse blows again shortly after replacement, it indicates a short circuit in the system, which requires further investigation.
Brake Light Switch
The brake light switch is a critical component of the cruise control system. It disengages cruise control when the brakes are applied, preventing the vehicle from accelerating while braking. A faulty brake light switch can prevent the cruise control from engaging or cause it to disengage intermittently. To test the brake light switch, check if the brake lights illuminate when the brake pedal is pressed. If the brake lights do not work, the switch may be faulty. Additionally, a diagnostic scan tool can often detect issues with the brake light switch. Replacement is usually a simple process, involving removing the old switch and installing a new one.
Wiring and Connections
Faulty wiring and loose connections can also cause cruise control problems. Inspect the wiring harnesses and connectors associated with the cruise control system, particularly those near the steering wheel, servo, and BCM. Look for signs of damage, corrosion, or loose connections. Clean any corroded terminals and ensure all connectors are securely fastened. A multimeter can be used to check for continuity and voltage in the wiring. If damaged wires are found, they should be repaired or replaced.
Body Control Module (BCM) Issues
The BCM is the central control unit for many of the vehicle's electronic systems, including cruise control. A malfunctioning BCM can cause a variety of problems, including cruise control failure. Diagnosing BCM issues often requires specialized diagnostic tools and software. A diagnostic scan tool can read trouble codes stored in the BCM, which can provide clues about the nature of the problem. In some cases, the BCM may need to be reprogrammed or replaced. This is a complex procedure that is best left to a qualified technician.
Cruise Control Servo Problems
The cruise control servo controls the throttle and maintains the vehicle's speed. A malfunctioning servo can prevent cruise control from engaging or cause erratic speed control. The servo can be tested using a diagnostic scan tool, which can activate the servo and monitor its response. Physical inspection of the servo and its linkage can also reveal problems, such as damaged cables or a malfunctioning actuator. Replacement of the servo may be necessary if it is found to be faulty.
Using a Diagnostic Scan Tool
A diagnostic scan tool is an invaluable tool for troubleshooting cruise control problems. It can read trouble codes stored in the vehicle's computer, providing valuable information about the nature of the problem. Scan tools range from basic code readers to advanced diagnostic systems that can perform a variety of tests and calibrations. When troubleshooting cruise control issues, a scan tool can identify problems with the brake light switch, BCM, servo, and other components. It can also help pinpoint wiring issues and sensor malfunctions. Using a scan tool requires some knowledge of vehicle diagnostics, but many models are user-friendly and provide clear instructions. If you are not comfortable using a scan tool, it's best to consult a qualified technician.
Conclusion
The absence of cruise control in a 2009 Silverado WT can be addressed through various solutions, from installing a factory system to opting for aftermarket kits. Understanding the reasons why your truck may lack this feature, along with the potential installation and troubleshooting steps, empowers you to make informed decisions. Whether you choose to add cruise control for enhanced driving comfort or need to diagnose and repair an existing system, this guide provides a comprehensive resource for navigating the complexities of cruise control in your 2009 Silverado WT. Remember to prioritize safety and consult with qualified professionals when dealing with electrical and mechanical systems to ensure a successful and reliable cruise control solution.
