Chevrolet Silverado 2014-2024
Complete Transmission Repair Guide
Expert insights on common transmission problems, repair costs, and maintenance for your Chevrolet Silverado. Trusted by Sonoma County drivers since 1978.
Common Chevrolet Silverado Transmission Problems
Based on our 45+ years of experience, these are the most common transmission issues we see with this vehicle model.
2015-2017 8-Speed Transmission Torque Converter Shudder (Widespread)
The 8L90 8-speed transmission in 2015-2017 Silverados has a widespread torque converter clutch shudder issue affecting thousands of trucks. GM issued TSB 18-NA-355 recommending Mobil 1 Blue Label ATF flush. Many owners require torque converter replacement. Issue is design-related and difficult to permanently resolve.
Common Symptoms
- •Vibration felt through entire vehicle at 40-70 mph
- •Feels like driving over rumble strips
- •Issue more noticeable when transmission is warm
- •Worse during light throttle input on highway
- •Can last 5-10 seconds or continue intermittently
- •Temporary improvement after fluid change (but usually returns)
Immediate attention required! This issue can lead to complete transmission failure if not addressed.
2018-2019 8L90 Improved but Persistent Shudder
Later production 8L90 transmissions (2018-2019) still experience shudder but less frequently than early models. GM continued issuing TSBs and calibration updates. Mobil 1 Blue Label fluid flush recommended as first step.
Common Symptoms
- •Similar shudder pattern at 40-70 mph
- •Less severe than 2015-2017 models
- •May occur only during towing or heavy load
- •Improving slightly with updated software
AFM (Active Fuel Management) Related Transmission Issues
Active Fuel Management system can cause transmission shifting issues due to the constant switching between 4 and 8 cylinder modes. Many owners opt for AFM delete or disable devices.
Common Symptoms
- •Harsh shifts when AFM activates/deactivates
- •Transmission hunting between gears
- •Reduced fuel economy
- •Check engine light with AFM codes
2015-2017 8L90 Transmission Pump Failure (Early Models)
Early 8L90 transmissions (2015-2017) suffered from catastrophic pump failures due to converter hub wear and inadequate internal cooling. This design flaw was partially addressed in later models but remains a concern. Requires complete transmission rebuild or replacement with updated pump assembly.
Common Symptoms
- •Loud whining noise from transmission area
- •No movement in any gear
- •Metal debris in transmission pan
- •Complete loss of line pressure
- •Failure typically occurs between 40,000-80,000 miles
Immediate attention required! This issue can lead to complete transmission failure if not addressed.
2020-2024 8L90 Delayed Engagement on Cold Start
2020+ Silverados experience delayed engagement in cold weather, likely related to torque converter stall speed control and TCM calibration. Fluid service and latest software updates can help. Not as critical as early shudder issues but warrants attention.
Common Symptoms
- •2-5 second delay when shifting from Park to Drive
- •More pronounced in cold weather (below 40°F)
- •RPMs rise before transmission engages
- •Clunk or thud when finally engages
- •Improves as transmission warms up
Harsh 1-2 Shift
Common complaint resolved through software updates, fluid changes, or valve body modifications. GM has released multiple calibration updates.
Common Symptoms
- •Hard jolt when shifting from 1st to 2nd gear
- •More pronounced when cold
- •Neck-snapping shift quality
- •May improve slightly when warm
Transmission Cooler Line Leaks
Factory transmission cooler lines are prone to corrosion and leaking, especially in cold climate areas with road salt exposure.
Common Symptoms
- •Red fluid under front of vehicle
- •Low transmission fluid warnings
- •Overheating when towing
- •Visible corrosion on cooler lines
Shift to Park Message
Faulty shift position switch or wiring issue causes false "Shift to Park" messages. Usually resolved with switch replacement or harness repair.
Common Symptoms
- •"Shift to Park" message despite being in Park
- •Unable to turn off vehicle
- •Key stuck in ignition
- •Random battery drain
Delayed Engagement
Can indicate low fluid pressure, worn clutches, or valve body issues. Early diagnosis important to prevent further damage.
Common Symptoms
- •2-3 second delay when shifting from Park
- •RPMs flare before engagement
- •Worse when cold
- •Clunk when finally engages
Not seeing your specific issue? Our ASE-certified technicians can diagnose any transmission problem.
Contact Our ExpertsChevrolet Silverado Transmission Services Available
Professional transmission repair services tailored to your Chevrolet Silverado. Contact us for a personalized quote based on your vehicle's specific needs.
Our Services Include:
Transmission Fluid Service (Mobil 1 Blue Label)
Complete fluid exchange with GM-approved Mobil 1 Blue Label ATF. Critical for addressing shudder issues.
Torque Converter Replacement
Replace faulty torque converter to eliminate shudder. Includes fluid service.
AFM Delete/Disable
Disable Active Fuel Management system to improve reliability and shift quality.
Transmission Calibration Update
Latest GM software updates to improve shift quality and adapt patterns.
Valve Body Replacement
Replace or rebuild valve body to correct shifting issues.
Transmission Rebuild
Complete 8L90 transmission overhaul with updated components. Includes warranty.
Cooler Line Replacement
Replace corroded cooler lines with upgraded stainless steel lines.
Shift Position Switch Repair
Replace faulty park position switch and repair wiring as needed.
Get Your Personalized Quote
Every Chevrolet Silverado is unique, and repair costs can vary based on:
- ✓Your vehicle's specific condition and mileage
- ✓The extent of repairs needed
- ✓Parts availability and options (OEM vs. aftermarket)
- ✓Any additional services discovered during inspection
Free Diagnostics: We provide comprehensive diagnostic services at no charge to accurately identify your transmission issues before any work begins. You'll receive a detailed written estimate with transparent pricing.
Why Choose Rohnert Park Transmission?
Transparent Pricing
No hidden fees or surprise charges. You approve all work before we begin.
Expert Technicians
ASE-certified specialists with extensive Chevrolet Silverado experience.
Quality Parts
We use OEM or equivalent quality parts for lasting repairs.
Convenient Service
Quick turnaround times and loaner vehicles available.
Chevrolet Silverado Transmission Maintenance Schedule
Follow this factory-recommended maintenance schedule to prevent costly transmission repairs and extend the life of your vehicle.
Professional Tip from Rohnert Park Transmission
Regular transmission fluid changes are the single most important maintenance item for preventing costly repairs. We recommend checking your fluid level and condition every 3,000 miles or during regular oil changes.
Schedule Maintenance CheckChevrolet Silverado Recalls & Technical Service Bulletins
Stay informed about important safety recalls and manufacturer service bulletins for your vehicle.
Active Recalls
Transmission Oil Cooler Line
Recall ID: 19V-642
Transmission oil cooler lines may leak, potentially causing loss of propulsion or fire.
Action Required: Contact your dealer or our shop for free recall service.
Transmission Control Software
Recall ID: 16V-652
Software error may cause unintended vehicle movement when shifted to Park.
Technical Service Bulletins (TSBs)
What are TSBs? Technical Service Bulletins are manufacturer advisories about known issues and recommended repair procedures. They are not recalls but provide valuable repair guidance.
Torque Converter Shudder Fix - 8L90 Fluid Flush Procedure
TSB #TSB 18-NA-355 • Issued: 2018-12-20
Critical procedure using ONLY Mobil 1 Blue Label ATF (not regular Dexron VI) to address torque converter shudder in 2015-2019 8L90 transmissions. Includes complete fluid drain, cooler flush, and filter replacement. Often temporary fix; many trucks eventually need torque converter replacement.
Related Symptoms:
Harsh 1-2 Shift Calibration - 8L90 Software Update
TSB #TSB 19-NA-206 • Issued: 2019-08-15
Software calibration to address harsh 1-2 shifts and improve overall shift quality on 2015-2021 models. Multiple iterations of this TSB released. Requires GM diagnostic scan tool and dealer-level programming.
Related Symptoms:
Shift to Park False Message - Park Position Switch
TSB #TSB 20-NA-104 • Issued: 2020-04-10
Repair procedure for false "Shift to Park" messages on 2016-2020 models. Includes park position switch replacement, wiring harness repair, and TCM recalibration. Prevents battery drain and allows vehicle shutdown.
Related Symptoms:
AFM System Interaction - Transmission Calibration
TSB #TSB 21-NA-152 • Issued: 2021-06-22
Updated transmission calibration to improve shift quality when Active Fuel Management activates and deactivates on 2014-2021 models. Addresses rough shifts and gear hunting when switching between 4 and 8 cylinder modes.
Related Symptoms:
Delayed Engagement Cold Start - TCM Software Revision
TSB #TSB 22-NA-089 • Issued: 2022-03-18
Software update for 2020-2024 Silverados addressing delayed engagement in cold weather. Improves torque converter stall speed control and TCM response time when shifting from Park to Drive in temperatures below 40°F.
Related Symptoms:
Need Help with a Recall or TSB?
Our certified technicians are familiar with all Chevrolet Silverado recalls and service bulletins. We can perform recall repairs and TSB-related services quickly and professionally.
Related Vehicle Repair Guides
Frequently Asked Questions
What fluid should I use in my Silverado 8-speed transmission?
GM specifically requires Mobil 1 Blue Label ATF (or ACDelco 10-9243) for the 8L90 transmission. Using the wrong fluid can cause shudder and shifting issues. Never use standard Dexron VI in these transmissions.
Why does my Silverado shudder between 40-70 mph?
This is a very common issue with the 8L90 transmission caused by torque converter clutch shudder. GM has issued TSBs recommending a complete fluid flush with Mobil 1 Blue Label ATF. If the flush doesnt resolve it, the torque converter may need replacement.
Can I disable AFM to prevent transmission problems?
Yes, many owners choose to disable Active Fuel Management using a Range AFM disabler or through ECM tuning. This can improve shift quality and prevent AFM-related engine and transmission issues. We can provide details on available options and installation during your consultation.
How much does it cost to rebuild a Silverado transmission?
The cost of a complete 8L90 transmission rebuild varies based on the extent of damage and specific parts needed. All rebuilds include necessary updates and our comprehensive 2-year/24,000-mile warranty. The 6-speed models typically require less complex repairs. Call (707) 584-7727 for a personalized quote based on your vehicle's specific condition.
Is the 8-speed transmission better than the 6-speed?
Both have their pros and cons. The 8L90 8-speed offers better fuel economy and smoother operation when working properly, but has had more issues with shudder and pump failures. The 6L80 6-speed is generally considered more reliable but less refined.
When should I change my Silverado transmission fluid?
GM recommends 45,000 miles for normal use, but we suggest 30,000 miles for better longevity. If you tow regularly, change it every 20,000 miles. Always use the correct fluid specification - this is critical for preventing shudder issues.
My 2016 Silverado shudders between 40-70 mph. Is it fixable?
This is the widespread 8L90 torque converter shudder issue affecting 2015-2019 Silverados. Start with a complete fluid flush using ONLY Mobil 1 Blue Label ATF (TSB 18-NA-355). If shudder persists, the torque converter likely needs replacement. Early diagnosis and proper fluid specification are critical. Call (707) 584-7727 to schedule a diagnostic scan.
What is AFM and why does it affect my transmission?
Active Fuel Management (AFM) switches between 4-cylinder and 8-cylinder operation to save fuel. The rapid switching can cause harsh transmission shifts and transmission hunting between gears. Many owners disable AFM using a Range AFM disabler or ECM tuning to improve reliability and shift quality. We can provide details on AFM delete options.
Should I get an AFM disabler for my Silverado?
AFM deletion can improve transmission shift quality, engine reliability, and longevity. However, you'll sacrifice some fuel economy. Popular options include Range AFM disablers or ECM tuning. The choice depends on your priorities (fuel economy vs. reliability). Call (707) 584-7727 to discuss options.
What does it mean if my Silverado won't shift out of Park?
This is usually the "Shift to Park" false message issue caused by a faulty park position switch or wiring problem. The vehicle thinks it's still in Park even when shifted. This causes battery drain and prevents shutdown. Requires park position switch replacement and wiring repair. Do not continue driving—get to a specialist immediately.
My 2022 Silverado hesitates when cold. Why?
This is the delayed engagement in cold weather issue documented in TSB 22-NA-089. When it's below 40°F, the transmission may take 2-5 seconds to engage after shifting from Park to Drive. A transmission fluid service with Mobil 1 Blue Label ATF and the latest TCM software update usually resolves this issue. Call for service availability.
Have more questions about your Chevrolet Silverado?
Talk to Our ExpertsTrusted Chevrolet Silverado Transmission Repair in Sonoma County
For over 45 years, Rohnert Park Transmission has been the go-to shop for Chevrolet owners throughout Sonoma County. Our ASE-certified technicians specialize in Silverado transmission repair and maintenance.
Why Choose Rohnert Park Transmission?
- ✓Factory-trained technicians specializing in Chevrolet transmissions
- ✓State-of-the-art diagnostic equipment for accurate problem identification
- ✓Transparent pricing with free estimates and no hidden fees
- ✓Same-day service for most transmission repairs
- ✓Convenient location serving Rohnert Park, Santa Rosa, and Petaluma