GM specifies DEXRON-VI for certain 6-speed automatic transmissions, DEXRON-HP for 8-speed transmissions, and DEXRON ULV for 10-speed transmissions in Silverado models.
Chevy Silverado Transmission Fluid
1. ACDelco DEXRON-VI Automatic Transmission Fluid
- Backward compatible with previous Dexron automatic transmission fluids and can be used as a much-improved replacement fo…
- Improved performance over previous Dexron fluids in: friction durability, viscosity stability, aeration and foam control…
- Potential to enable improved fuel economy and longer transmission life
ACDelco DEXRON-VI is the factory-brand option to consider for Silverado models equipped with a transmission requiring DEXRON-VI. It is particularly relevant to many older Silverado applications using 6-speed and other GM transmissions that specify DEXRON-VI.
Features:
- DEXRON-VI automatic transmission fluid
- ACDelco/GM-branded fluid
- Designed for GM automatic transmissions requiring DEXRON-VI
- Suitable for many Silverado 6-speed applications
- Helps provide consistent transmission operation
- Available in different container sizes
For a Silverado that specifically calls for DEXRON-VI, matching the fluid specification is more important than choosing a newer or more expensive fluid.
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2. ACDelco DEXRON-HP Automatic Transmission Fluid
ACDelco DEXRON-HP is designed for GM transmissions that require the DEXRON-HP specification. GM lists DEXRON-HP for Silverado 8-speed automatic transmissions in its owner’s manuals.
Features:
- DEXRON-HP automatic transmission fluid
- GM/ACDelco branded product
- Designed for transmissions requiring DEXRON-HP
- Appropriate for many Silverado 8-speed applications
- Formulated for modern automatic transmissions
- Suitable for maintenance and fluid replacement when the specification matches
If your Silverado has an 8-speed transmission requiring DEXRON-HP, don’t substitute DEXRON-VI simply because both fluids are designed for GM automatic transmissions.
3. ACDelco DEXRON ULV Automatic Transmission Fluid
ACDelco DEXRON ULV is the GM fluid specification used in many Silverado 10-speed automatic transmissions. GM lists DEXRON ULV for the 10-speed transmission in Silverado documentation.
Features:
- DEXRON ULV automatic transmission fluid
- GM/ACDelco branded
- Designed for applications requiring DEXRON ULV
- Suitable for many Silverado 10-speed transmissions
- Low-viscosity formulation
- Intended for modern GM automatic transmissions
Because ULV fluids are designed around specific transmission requirements, check your exact Silverado transmission before using this fluid.
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4. Valvoline DEX/MERC Automatic Transmission Fluid
- Formulated with premium base stocks and advanced additive technology to meet the challenging demands of automatic transm…
- Enhanced anti-shudder protection for smooth shifting and maximum power transfer
- Developed with anti-wear technology to help improve transmission durability
Valvoline DEX/MERC is a widely available automatic transmission fluid that is designed for applications calling for certain DEXRON and MERCON specifications. It can be useful for compatible older GM applications, but it should not automatically be treated as a replacement for DEXRON-HP or DEXRON ULV.
Features:
- Automatic transmission fluid
- Designed for specified DEXRON/MERCON applications
- Suitable for compatible GM applications
- Available in convenient bottle sizes
- Designed to provide smooth shifting
- Useful for vehicles whose manual specifies a compatible DEXRON/MERCON-type fluid
Always read the current product label and specification information before using it in a Silverado.
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5. Castrol Transmax Automatic Transmission Fluid
- The information below is per-pack only
- Enhanced friction durability for smooth transmission performance
- Exceptional high temperature protection to effectively resist fluid oxidation
Castrol Transmax offers several automatic transmission fluid formulations for different vehicle applications. Its advantage is the wide range of available formulations, but Silverado owners need to select the exact Transmax product that meets their transmission’s required specification.
Features:
- Available in multiple ATF formulations
- Designed for automatic transmission applications
- Formulations available for different manufacturer specifications
- Helps support smooth shifting
- Available in various package sizes
- Widely available through automotive retailers
Do not assume every Castrol Transmax product is suitable for a Silverado. The specific formulation and stated specification must match the transmission.
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What Transmission Fluid Does a Chevy Silverado Use?
The correct transmission fluid varies by transmission.
GM’s Silverado documentation confirms these specifications across several model years. For example, the 2020 Silverado manual lists DEXRON-VI for the 6-speed, DEXRON-HP for the 8-speed, and DEXRON ULV for the 10-speed.
Later Silverado 1500 models continue to specify DEXRON-HP for 8-speed transmissions and DEXRON ULV for 10-speed transmissions.
This is why simply buying a transmission fluid labeled “compatible with Chevy” isn’t enough. The fluid should meet the specification required by your particular transmission.
How Much Transmission Fluid Does a Chevy Silverado Take?
Transmission fluid capacity varies significantly between Silverado models and transmissions.
A complete transmission rebuild or dry fill generally requires more fluid than a drain-and-fill service. The amount also depends on how much fluid remains in the torque converter, cooler, lines, and transmission during servicing.
For this reason, it is better to use the capacity listed for your specific Silverado transmission rather than relying on a generic “Silverado transmission capacity.”
When servicing the transmission, follow the manufacturer’s procedure for checking the fluid level. Some modern transmissions do not use a traditional dipstick, and the fluid level may need to be checked at a specified temperature using a particular procedure.
When Should You Change Silverado Transmission Fluid?
Transmission-fluid service intervals vary according to the model, transmission, driving conditions, and manufacturer’s maintenance schedule.
Heavy towing, frequent hauling, stop-and-go driving, high temperatures, and other severe operating conditions can place additional demands on the transmission.
Instead of using a universal mileage interval, check the maintenance schedule for your specific Silverado. GM’s owner’s manuals provide maintenance information based on the vehicle and operating conditions.
Signs Your Silverado May Need Transmission Service
Old, contaminated, low, or incorrect transmission fluid can be associated with transmission problems. Possible warning signs include:
- Delayed engagement
- Harsh shifting
- Slipping between gears
- Transmission shudder
- Unusual transmission noises
- Difficulty selecting gears
- Fluid leaks
- Transmission overheating
- Warning lights
These symptoms do not automatically mean the fluid needs changing. Mechanical, electrical, hydraulic, or software-related problems can produce similar symptoms. A proper diagnosis is recommended before replacing the fluid.
Can You Mix Different Transmission Fluids?
It is better to avoid mixing different transmission fluids unless the manufacturer or fluid manufacturer specifically confirms compatibility.
DEXRON-VI, DEXRON-HP, and DEXRON ULV are different GM specifications used for different transmission applications. GM’s manuals specifically identify different fluids for the 6-speed, 8-speed, and 10-speed transmissions.
Using the wrong fluid can affect shift quality, lubrication, hydraulic operation, and transmission performance.
Final Thoughts
The best Chevy Silverado transmission fluid is the one that matches the exact specification required by your transmission.
For many Silverado applications, that means DEXRON-VI for a 6-speed, DEXRON-HP for an 8-speed, or DEXRON ULV for a 10-speed. GM documentation confirms these specifications across multiple Silverado model years.
ACDelco fluids are convenient options when you want the GM-branded specification, while products from manufacturers such as Valvoline and Castrol can be considered when their specific formulation explicitly meets the required specification.
Before buying any fluid, check your Silverado’s model year, transmission, and owner’s manual. The transmission specification, not simply the Silverado name, is what determines the correct ATF.
