Is your 2017 Silverado not shifting smoothly? Feeling a shudder when accelerating? Or maybe you're seeing that dreaded check engine light illuminating your dashboard? You're not alone. The 2017 Silverado, while a popular and generally reliable truck, has been known to experience transmission issues, specifically with its 8-speed automatic transmission (8L90). These problems can range from minor annoyances to major, potentially expensive, repairs.
Addressing these transmission issues promptly is crucial for maintaining the longevity and performance of your Silverado. Ignoring these symptoms can lead to further damage, reduced fuel efficiency, and even complete transmission failure, leaving you stranded and facing a hefty repair bill. Understanding the common causes and potential solutions for these problems can empower you to make informed decisions, whether you choose to tackle the issue yourself or seek professional help. Taking proactive steps now can save you time, money, and a lot of headaches down the road.
What are the common 2017 Silverado transmission problems and how can I fix them?
What are the most frequent 2017 Silverado transmission problems?
The most frequent transmission problems reported for the 2017 Silverado typically revolve around rough or erratic shifting, shuddering or shaking during acceleration, slipping gears, delayed engagement (especially when shifting into drive or reverse), and complete transmission failure. These issues often manifest as noticeable symptoms affecting the overall driving experience.
Many of the reported problems with the 2017 Silverado's 8-speed transmission (8L90) stem from a few key areas. One significant contributor is the torque converter, which can experience shuddering, particularly at lower speeds. This shudder is often attributed to issues with the transmission fluid degrading prematurely or containing excessive moisture. Software glitches within the transmission control module (TCM) can also cause erratic shifting and harsh engagement. Internal mechanical failures, while less common, can occur over time due to wear and tear, especially in vehicles subjected to frequent towing or heavy use. While the issues often revolve around the 8-speed transmission, some 6-speed transmission (6L80) equipped Silverados also encounter problems. These commonly involve hard shifting, particularly between 1st and 2nd gear, or complete failure of the transmission due to internal wear. Regular maintenance, including fluid changes, is crucial to preserving the lifespan of both the 6-speed and 8-speed transmissions and preventing these issues from arising.What diagnostic steps should I take before attempting repairs?
Before attempting any repairs on your 2017 Silverado's transmission, a thorough diagnostic process is crucial to accurately pinpoint the problem and avoid unnecessary work or further damage. Start with a visual inspection, fluid level check, and a scan for diagnostic trouble codes (DTCs) using an OBD-II scanner. These initial steps provide a foundation for a more in-depth analysis.
A comprehensive diagnostic approach begins with visually inspecting the transmission for any external leaks around the pan, seals, and cooler lines. Next, check the transmission fluid level using the dipstick (if equipped) or the fill plug. Low fluid can cause various issues, while burnt or contaminated fluid indicates internal damage. Carefully examine the fluid's color and smell. Following the physical inspection, use an OBD-II scanner to retrieve any stored DTCs from the transmission control module (TCM) and engine control module (ECM). These codes will provide valuable clues about the nature and location of the problem. Record all codes and research their specific meanings related to your Silverado's transmission. After gathering the initial information, further diagnostics may include live data monitoring with the scan tool, checking the transmission cooler lines for proper flow, and performing specific tests recommended by the service manual based on the retrieved DTCs. Live data can reveal issues with sensor readings, solenoid operation, and shift patterns. If the cooler lines are clogged or restricted, it can cause overheating and transmission failure. Keep in mind that some diagnostic steps might require specialized tools and knowledge, and it could be best to consult a qualified mechanic to ensure accurate and safe repairs.Could a simple fluid change resolve my 2017 Silverado's transmission issue?
A transmission fluid change *could* potentially resolve some minor transmission issues in your 2017 Silverado, especially if the problems are related to fluid contamination or low fluid level. However, it's not a guaranteed fix and depends heavily on the nature and severity of the problem.
A fluid change is most likely to help if the symptoms are mild, such as occasional slipping or rough shifting, and the fluid appears dirty, discolored, or smells burnt. Fresh fluid can restore proper lubrication and hydraulic pressure, potentially resolving these minor issues. Modern automatic transmissions rely on specific fluid properties for optimal operation, and degraded fluid can negatively impact performance. However, if the transmission problems are more severe – like significant slipping, banging noises, failure to shift, or complete loss of drive – a fluid change is unlikely to be a sufficient solution. These symptoms often indicate internal mechanical damage to gears, clutches, or valve bodies. In such cases, a more extensive repair, such as a transmission rebuild or replacement, is usually necessary. Moreover, attempting a fluid change on a severely damaged transmission could potentially worsen the condition by dislodging debris and further clogging internal components. Always consult a qualified mechanic for proper diagnosis before attempting any repairs.What are the costs of common 2017 Silverado transmission repairs?
The cost to fix common 2017 Silverado transmission problems can vary significantly depending on the specific issue and the repair needed. Minor repairs like replacing a faulty sensor or solenoid might range from $200 to $600. A more involved repair, such as replacing valve body components or rebuilding the transmission, could cost between $1,500 and $4,500. A complete transmission replacement is the most expensive option, potentially exceeding $3,000 to $7,000, including parts and labor.
The wide price range reflects the complexity of modern transmissions and the varying labor rates among different auto repair shops. For example, a simple fluid flush, which might resolve minor shifting issues, is relatively inexpensive. However, internal damage to gears, clutches, or torque converters necessitates a more extensive and costly repair. Furthermore, dealerships typically charge higher labor rates than independent repair shops, contributing to price differences. The most accurate way to determine the cost of your 2017 Silverado transmission repair is to obtain quotes from multiple reputable mechanics. Be sure to provide them with specific details about the symptoms you're experiencing. A thorough diagnostic inspection is crucial to pinpoint the exact cause of the problem before committing to any repairs. Factor in the costs of towing and a rental vehicle, if needed, to get a comprehensive view of the overall expense.When is a transmission rebuild or replacement necessary?
A transmission rebuild or replacement for your 2017 Silverado becomes necessary when significant internal damage exists, rendering simpler repairs ineffective. This generally means major components like gears, clutches, valve bodies, or the torque converter are severely worn, broken, or malfunctioning to the point where the transmission can no longer reliably perform its functions.
Generally, you'll consider a rebuild when symptoms such as slipping gears, harsh or delayed shifting, loud noises (whining, clunking), persistent leaks even after seal replacement, or the presence of metal shavings in the transmission fluid become evident and diagnostic testing confirms internal mechanical failure. While minor issues like a faulty sensor or solenoid can sometimes cause similar symptoms, a rebuild/replacement is usually indicated when those simpler fixes don't resolve the problem, and a thorough inspection reveals extensive wear or damage within the transmission itself. The cost of individual parts and labor required to repair widespread damage often exceeds the cost of a rebuild or replacement, making those options more economically sound in the long run. The decision between a rebuild and a replacement often hinges on the extent of the damage and the overall condition of the transmission case. If the case itself is cracked or warped, a replacement is usually the better choice. A rebuild involves disassembling the transmission, replacing worn or damaged parts with new or remanufactured components, and then reassembling it to factory specifications. A replacement involves installing a completely new or remanufactured transmission unit. Remanufactured units are generally less expensive than brand new ones and come with a warranty. Ultimately, a professional transmission specialist can provide the most accurate diagnosis and recommend the best course of action based on the specific issues affecting your 2017 Silverado's transmission.Are there any recalls or known issues for the 2017 Silverado transmission?
Yes, the 2017 Silverado equipped with the 8-speed (8L90) transmission has been subject to recalls and has known issues, primarily related to harsh shifting, shuddering, and general rough operation. While not all 2017 Silverados experience these problems, it's a common complaint among owners and there was a technical service bulletin (TSB) issued.
The most prevalent issue is the "Chevy Shake," a vibration or shudder felt at highway speeds, especially during light acceleration or when the transmission is shifting between gears. This is often attributed to the torque converter clutch and its modulation. General Motors released TSBs to address this, involving a transmission flush procedure with a specific updated Mobil 1 synthetic transmission fluid. The intent of the flush is to remove any contaminants that might be causing the shudder and improve the transmission's overall performance. However, it is important to note that while the fluid change often helps initially, the shudder can return for some owners. If you are experiencing transmission problems with your 2017 Silverado, the first step is to check your vehicle's VIN against recall databases maintained by the National Highway Traffic Safety Administration (NHTSA) and GM to see if it is covered by any active recalls or service programs related to the transmission. Even if not under recall, taking your vehicle to a qualified mechanic, ideally one familiar with GM transmissions, for diagnosis is recommended. They can perform diagnostic tests, check for error codes, and advise on the most appropriate course of action, which may include the recommended transmission flush, software updates (if available), or, in more severe cases, component replacement such as the torque converter.Can I perform transmission repairs myself, or is professional help recommended?
Generally, professional help is strongly recommended for transmission repairs on a 2017 Silverado. Modern transmissions are complex systems with intricate electronic controls and precise mechanical components. Even seemingly minor issues can stem from deeper problems requiring specialized diagnostic equipment and expertise.
Attempting to repair a transmission yourself without the proper knowledge, tools, and experience can lead to further damage, potentially turning a simple fix into a complete transmission replacement. Diagnostic error is a common problem, as symptoms can be misleading. What appears to be a solenoid issue, for instance, could be caused by low fluid pressure resulting from a failing pump. Properly diagnosing the root cause requires specialized scanners and the ability to interpret complex data streams. Furthermore, rebuilding a transmission involves meticulous cleaning, inspection, and reassembly with exact tolerances. Even slight deviations from factory specifications can significantly impact performance and longevity. While basic maintenance like fluid changes can sometimes be handled by experienced DIYers, actual repairs, including valve body work, solenoid replacement, or internal component replacement, are best left to qualified technicians. They possess the necessary training, equipment, and access to specialized parts and technical information to ensure the job is done correctly. A reputable shop will also offer a warranty on their work, providing peace of mind that a DIY repair simply cannot match.Well, that's about it! Hopefully, this has given you a good starting point for diagnosing and maybe even fixing those pesky 2017 Silverado transmission issues. Remember, if things get too complicated, don't hesitate to call in a professional. Thanks for reading, and we hope to see you back here soon for more helpful tips and tricks!