2017 Chevrolet Silverado 1500 Transmission Fluid & Service

Quick Answer

• Transmission Make/Model: GM 8L90 (RPO M5U)
• OEM Fluid Spec: Dexron ULV Automatic Transmission Fluid
• Drain & Fill Capacity: Approximately 7 quarts (6.6 liters)
• Full Overhaul Capacity: Approximately 11.8 quarts (11.1 liters)
• Filter OEM Part Number: Verify with dealer or service manual
• Recommended Service Interval:
  • Normal Duty: 97,500 miles (150,000 km)
  • Severe Duty/Towing: 45,000 miles (72,000 km) or 3 years

Fluid Type Explained

The 2017 Chevrolet Silverado 1500 equipped with the 8L90 automatic transmission requires Dexron ULV (Ultra Low Viscosity) automatic transmission fluid. This specific fluid is engineered to meet the demanding requirements of modern transmissions, including those with tighter tolerances and more intricate valve body designs. Dexron ULV offers superior friction characteristics, oxidation stability, and wear protection, all of which contribute to smooth shifting, optimal fuel efficiency, and extended transmission life.

Using any other type of transmission fluid can lead to serious problems. Incorrect fluid can cause premature wear, erratic shifting, overheating, and ultimately, transmission failure. Always ensure that any fluid used meets the Dexron ULV specification. Look for products explicitly stating compliance with or exceeding this standard.

Service Procedure

Regular transmission fluid service is crucial for the longevity and performance of your 2017 Chevrolet Silverado 1500's 8L90 transmission. There are two primary methods for servicing the transmission fluid: the drain and fill method and the full fluid exchange.

Drain and Fill

The drain and fill method involves draining the fluid from the transmission pan, replacing the transmission filter, and then refilling the transmission with new fluid. This method typically replaces only a portion of the total transmission fluid, as a significant amount remains in the torque converter, cooler lines, and other internal components. For the 8L90 transmission in your 2017 Silverado, a drain and fill will replace roughly 7 quarts of fluid. While simpler and less expensive, this method does not completely remove all old fluid. It's often recommended for regular maintenance intervals.

Full Fluid Exchange

A full fluid exchange, sometimes referred to as a "flush," involves using specialized equipment to completely remove all old fluid from the transmission system, including the torque converter and cooler lines, and replacing it with new fluid. This method ensures that nearly 100% of the old, degraded fluid is removed. While more comprehensive, some experts advise caution with flushes on older, high-mileage transmissions if they haven't been regularly serviced, as a sudden change in detergent levels can sometimes dislodge deposits. However, for a properly maintained transmission, a full fluid exchange can be beneficial.

Regardless of the method chosen, it is imperative to use the correct Dexron ULV fluid and to replace the transmission filter. The transmission filter prevents contaminants from circulating through the system and causing damage.

Service Interval

The service interval for your 2017 Chevrolet Silverado 1500's transmission fluid can vary significantly based on your driving conditions. Chevrolet outlines two main categories:

• Normal Duty: For vehicles primarily driven in conditions that do not involve heavy loads, frequent towing, or extreme temperatures, the recommended service interval is approximately 97,500 miles (150,000 km). This interval assumes average driving habits and conditions.

• Severe Duty/Towing: If you frequently tow trailers, carry heavy loads, drive in mountainous terrain, or operate in extremely hot or cold climates, your transmission is subjected to greater stress and higher temperatures. In these severe duty conditions, the transmission fluid degrades more quickly. Therefore, it is recommended to service the transmission fluid and filter every 45,000 miles (72,000 km) or every 3 years, whichever comes first. Adhering to this more frequent interval is crucial for preventing premature wear and potential transmission issues.

Always consult your owner's manual for the most accurate and up-to-date service schedule recommendations for your specific vehicle.

Common Transmission Problems (GM 8L90)

The GM 8L90 transmission, while generally robust, has had a few commonly reported issues in this generation of Silverado. One of the most frequently discussed problems is related to torque converter shudder or judder, often felt as a vibration or pulsation, particularly under light throttle or during gear changes. This issue is often attributed to fluid degradation and can sometimes be resolved with a fluid exchange using updated Dexron ULV fluid formulations.

Another common complaint involves harsh or delayed shifts, especially during cold operation or after prolonged highway driving. These symptoms can be caused by various factors, including worn valve body components, issues with the transmission control module (TCM) software, or fluid quality degradation. In some cases, a transmission software reflash or adaptation reset by a dealership or qualified technician can alleviate these concerns.

Less common, but still reported, are internal bearing failures or issues with clutch pack wear, which can lead to slipping gears or a complete loss of drive. Early signs might include burning smells, unusual noises, or warning lights on the dashboard. Addressing these issues promptly is essential to prevent more extensive and costly repairs.

Always seek professional diagnosis from a qualified technician if you experience any unusual symptoms with your transmission.

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