2019–2024 Chevy Silverado 1500 Transmission Repair in Glendale, AZ (6L80 / 8L90 / 10L80)

Sun West Transmissions — Glendale, AZ. Free estimates on 2019-2024 Silverado 1500 transmission concerns and a 3-year / 40,000-mile warranty on qualifying rebuilds and replacements.

The current-generation Silverado 1500, often called the T1XX, arrived for 2019 with a wide spread of engines, from a turbocharged four-cylinder to V8s and a 3.0L Duramax diesel, and three different automatic transmissions behind them. That makes identifying your exact transmission especially important. These trucks rack up miles quickly around Surprise, Buckeye and the Loop 303 corridor, where long highway runs, summer heat and trailers all add up. Sun West Transmissions in Glendale diagnoses and repairs the six-, eight- and ten-speed automatics used in these trucks.

Which Transmission Is in Your 2019-2024 Silverado 1500?

On these trucks, engine, trim and model year all play a part. As a general guide:

Transmission	Speeds	Typically paired with	Good to know
6L80	6	The 4.3L V6 and some 5.3L trucks, mostly in earlier years	The same basic design used in earlier Silverados
8L90	8	Some 5.3L trucks, depending on trim and year	Known for shudder and firm shifts
10L80	10	The 6.2L V8, many 5.3L trucks and the 3.0L Duramax diesel	Developed jointly by GM and Ford

Because these pairings changed from year to year, we do not guess. Call (623) 473-9800 with your VIN and we will confirm the transmission before quoting, or check the RPO codes on the Service Parts Identification label, usually found in the glovebox. If you drive the 2.7L turbo four-cylinder, the VIN check is just as important.

Common Problems in 2019-2024 Silverado 1500 Transmissions

10L80: harsh or erratic shifting

The ten-speed can deliver harsh upshifts, clunky downshifts or busy shifting as it hunts for the right gear. Some trucks respond to a software update and an adaptive relearn; others have internal wear that needs repair. See 10L80 harsh shifting and our 10L80 rebuild page.

8L90: converter shudder

A shudder as the converter clutch applies was a well-known complaint on GM eight-speeds, and GM revised the recommended fluid to address it. If the shudder returns after a fluid exchange, the converter is the next suspect, and once it is damaged it has to be repaired or replaced. More at 8L90 shudder and 8L90 rebuild.

6L80: shudder and hard shifts

Six-speed trucks from this generation share the 6L80’s familiar patterns: torque converter shudder and hard or erratic shifts. Details are on our 6L80E rebuild page.

Warning Signs

• A shift that bangs or flares, especially between the lower gears
• Shudder or buzzing at steady cruising speed
• Gear hunting on light grades or in traffic
• Delayed engagement into Drive or Reverse
• A transmission message, check engine light or reduced power
• Fluid leaks under the truck

Newer transmissions depend heavily on software, so proper diagnosis comes first. Our transmission diagnostic testing sorts out software, wiring and mechanical faults before any parts are replaced.

Before your visit, jot down when the problem shows up: hot or cold, light or heavy throttle, and which shift it affects. Those details help us reproduce the complaint on the road test.

2019-2024 Silverado 1500 Transmission Prices

Current Sun West prices for these transmissions are on our price pages:

Or call (623) 473-9800 for a free quote.

Rebuild, Remanufactured or Used?

On a newer truck, the right repair depends on the transmission’s condition and how long you plan to keep the truck. Sun West offers:

• Rebuild: we overhaul your existing unit and replace whatever is worn or damaged.
• Remanufactured: a complete replacement transmission, which can reduce downtime on complex eight- and ten-speed units.
• Used: a lower-cost option. We will go over the terms with you first.

Qualifying rebuilds and replacements carry our 3-year / 40,000-mile warranty with no deductible on covered repairs, honored at our Glendale shop, and financing is available.

After Installation

Modern GM transmissions need more than a fluid fill once they are installed:

• Programming: the control module is updated or programmed to match the transmission (TCM programming)
• Adaptive relearn: so the transmission learns clutch fill and shift timing
• Cooler service: a cooler and line flush, or cooler replacement when contamination is heavy
• Correct fluid: DEXRON VI for the 6L80, DEXRON ULV for the 10L80 and the fluid GM specifies for the 8L90
• Road test: shift quality, converter lockup and a leak check

Heat and Towing Tips for Your 2019-2024 Silverado

• Select Tow/Haul mode with any trailer; it changes shift timing and reduces gear hunting.
• On long climbs, such as the I-17 grade toward Flagstaff, holding a lower gear with range select (if equipped) cuts down on shift cycling and heat.
• Stay within the tow rating for your exact engine and configuration; your owner’s manual lists it.
• Shorten fluid service intervals if you tow or sit in summer traffic (transmission fluid change).
• Ask whether an auxiliary transmission cooler makes sense for the way you use your truck.

More: how Arizona heat affects your transmission and towing and your transmission.

2019-2024 Silverado 1500 Transmission FAQ

Which transmission does my 2019-2024 Silverado have?

It could be the 6L80, 8L90 or 10L80, depending on engine, trim and year. Call with your VIN and we will confirm it.

Does the 3.0L Duramax use the ten-speed?

Yes. The 3.0L Duramax diesel is paired with the 10L80. Call (623) 473-9800 for a free quote on diesel transmission work.

Can software fix a harsh-shifting 10L80?

Sometimes. Updates and relearns resolve some complaints, but if clutches or the valve body are worn, the transmission needs mechanical repair. Testing tells us which.

Do you install remanufactured transmissions in newer trucks?

Yes. A remanufactured unit is one of three options we offer, alongside rebuilding your transmission or installing a good used one.