Chevy Silverado 2500 HD Transmission Problems & Cost | 4L80E / Allison 1000 / 6L90

If you buy a Chevrolet Silverado 2500HD, then you’ve obviously got stuff to stuff to do. But this truck does a lot more than just haul and tow stuff. It can be your daily driver, family vehicle, and it may even be able to get reasonable fuel economy, if it’s equipped properly (i.e. Silverado 2500HD Duramax). However, Chevrolet Silverado 2500 transmission problems do still happen. So let’s find out what you can do about them.

Need a replacement transmission? Get an estimate for replacement transmissions and local installation. Look up your transmission model by vehicle make and model.

What Transmission Do I Have?

Chevy Silverado 2500 HD Transmission Models

Chevy Silverado 2500 HD: 4L80E Transmission (Early Models)
Chevy Silverado 2500 HD: Allison 1000 Transmission (6.6L and 8.1L Diesel Only)
Chevy Silverado 2500 HD: 6L90 Transmission (Late Models)

Chevy Silverado 2500 HD Transmission Replacement Cost Estimate

Pricing varies by model. To be 100% sure on pricing, have your VIN# handy and use our Get An Estimate feature to look up your transmission by VIN#.

Replacement 4L80E Transmission:
The 4L80E is a heavy duty 4-speed automatic transmission, and it’s an evolution of the 3-speed Turbo-Hydramatic 400 / TH400 transmission that was first introduced in 1963. The heavy duty internal components are rated to withstand engines with up to 440 lb-ft of torque, and a GVWR of up to 18,000 lbs. This modernized Chevrolet Silverado 2500 transmission was introduced back in 1991, and featured an overdrive gear, along with a lockup torque convertor, and electronic controls that optimized shifting behavior, engine performance and efficiency.

TransmissionStreet Smart TransmissionAutozoneAdvance Auto Parts

Replacement Allison 1000 Transmission:
The Allison 1000 is a heavy duty automatic transmission that’s based on an earlier Allison medium-duty commercial truck transmission. It was initially offered as a 5-speed, but a 6-speed version followed around 2005. Later incarnations of the Silverado 2500 Allison 1000 featured more advancements, including a Low Traction Mode, Cruise Control Grade Braking, and Park Warmup Mode.

TransmissionStreet Smart TransmissionAutozoneAdvance Auto Parts
Allison 1000Call27802800

Replacement 6L90 Transmission:
The 6L90 transmission was first paired with the Chevy Silverado 2500HD 6.0L in 2007, and featured a number of advanced features that were designed to improve performance and driver control. Some of modern elements include a four element torque convertor with an integrated pump, unique planetary gearsets for a wider range of gear ratios, clutch-to-clutch shifting, and an advanced TCM (Transmission Control Module) that allows for a Performance Algorithm Shifting (PAS) program for instant shift pattern adjustment changes based on load, a Driver Shift Control program for manual shift capability, and automatic grade braking / engine braking. The maximum engine torque capacity for the Silverado 2500HD 6L90 transmission is 531 lb-ft and a GVWR of 21,000 lbs.

TransmissionStreet Smart TransmissionAutozoneAdvance Auto Parts
6L80 / 6L90229024502480

What are the DTC codes related to Chevy Silverado 2500 HD transmission problems?

P0894 – Transmission component slipping – This OBDII trouble one of the gear ratios is not consistent with what the ECU is asking for.
P0218 – Transmission over temperature – This diagnostic trouble code is triggered when the gearbox exceeds the maximum allowable temperature
P0776 – Pressure Control Solenoid ‘B’ Performance or Stuck Off – This diagnostic trouble code means there is a mechanical problem with this solenoid.
P0796 – Pressure Control Solenoid ‘C’ Performance or Stuck Off – If the pressure control solenoid labeled ‘C’ isn’t working correctly, or it gets stuck in the ‘On’ position, this DTC will be saved.
P2714 – Pressure control solenoid ‘D’ performance/stuck ‘off’ – This DTC is triggered when there is an issue with one of the solenoids that controls the fluid pressure inside the transmission.
P2723 – Pressure control solenoid ‘E’ performance/stuck ‘off’ – This diagnostic trouble code is saved when the ECU detects a problem with one of the pressure control solenoids.
P0735 Gear 5 Incorrect Ratio – When you have this diagnostic trouble code, it means there is either an electrical or hydraulic problem that is affecting the shift into 5th gear.
P0777 Pressure Control Solenoid ‘B’ Stuck On – This DTC means this pressure control solenoid is stuck ‘on’, and can’t function properly.
P0742 Torque Converter Clutch Circuit Stuck On – If your vehicle has this DTC, then the torque convertor clutch solenoid is most likely stuck in the ‘on’ position.

Chevy Silverado 2500 HD Transmission Recalls

None Found

Chevy Silverado 2500 HD Technical Service Bulletins (TSB)

TSB 08-07-30-016 – Slipping, refusal to shift, overheating – Chevrolet Silverado 2500 4L80E
Problem – Slipping between the gears, overheating, refusal to shift out of a gear, and/or DTC P0894 or P0218, may be because by friction material debonding from the torque convertor clutch (TCC).
Solution – If the friction material has circulated throughout the transmission, the entire transmission may need to be replaced. It is possible to remove the material from the internal components (like transmission cooler lines and the valve body), but it depends on the extent of the damage.

Solenoid DTC’s – Chevrolet Silverado 2500 6L90
Problem – A number of diagnostic trouble codes, including P0776, P0796, P2714 and P2723, can be caused by a pressure leak at the end of the clutch regulating valve.
Solution – The bore plug will have to be replaced with updated versions, or modified to accept an O-ring kit.

TSB 04-07-30-018A – 2001-2006 Chevrolet Silverado 2500 HD Allison 1000
Problem – In cold climates, it may not be possible to shift the transmission after operating it in snow, slush, or icy conditions. This is likely due to ice buildup around the shift cable-to-manual shaft connection.
Solution – Install an aftermarket transmission shield.

TSB 06-07-30-013 – 2006 Chevrolet Silverado 2500 HD Allison 1000
Problem – Owners may experience a shudder occurs in 6th gear in 4Hi between 46 mph (74 km/h) and 49 mph (79 km/h).
Solution – Reprogram the TCM with TIS version 6.0 or higher.

TSB 08-07-30-049A – 2006-2007 Chevrolet Silverado Classic 2500 Allison 1000 & 2007-2009 Chevrolet Silverado 2500 HD Allison 1000
Problem – ATF leak coming from one of the transmission cooler lines.
Solution – Replace lines with updated design: GM Part #’s 20759971 (upper), 20759972 (lower), 20759971 (hose).

TSB 10-07-30-008A – 2006-2010 Chevrolet Silverado 2500 HD Allison 1000
Problem – Owners may experience a failure to shift into overdrive, or a 4-5 shift flare. Possible DTC P0777 or P0735.
Solution – Inspect and possibly replace the 3rd, 5th, and reverse clutch piston.

PIP4290A – 2007-2013 Chevrolet Silverado 2500 HD Allison 1000
Problem – Owners may experience stalling or surging when stopped with the transmission in gear. Possible DTC P0742.
Solution – Inspect and replace the TCC solenoid and valve inside the valve body.

Common Problems with the Chevy Silverado 2500 HD Transmission

Lack of Response
Leaking Fluid
Low Fluid
Burning Smell
Grinding or Shaking
Whining, Clunking or Humming
Refuses to Go Into Gear
Torque Converter Issues
Valve Body Issues
Transmission Noisy in Neutral
Gears Slipping
No 3rd or 4th Gear
No 1st or 2nd Gear
No Reverse
Dragging Clutch
Trouble Codes / Check Engine Light

Can I drive with a transmission problem?

The Chevrolet Silverado 2500 is engineered to handle almost anything, but transmission problems can stop it dead in its tracks. Even though many Silverado 2500 transmission problems start out as minor inconveniences, they can quickly escalate if you don’t have them addressed immediately. So do yourself a favor and go see a mechanic right away.

How often does a Chevy Silverado 2500 HD transmission need to be replaced?

Driving style and maintenance on the two biggest factors in how long your transmission will last. Factory design flaws also contribute to the longevity, as premature failures can often lead to the most common Silverado 2500HD transmission problems. On average, we noticed the following typical lifespans:
4L80E – 120,000-180,000 miles
6L90 – 130,000-200,000 miles
Allison 1000 – 160,000-220,000 miles

How are Chevy Silverado 2500 HD transmission issues diagnosed?

When trying to diagnose Chevrolet Silverado 2500 transmission problems, it’s important to check the level and condition of the transmission fluid. Next, an OBDII scan tool can allow you to download all of the diagnostic trouble codes, which can often tell you what’s going on with the transmission. After that, a visual inspection will need to be performed.

How is a Chevy Silverado 2500 HD transmission replaced?

In order to replace your Silverado 2500 transmission, the old one will have to be disconnected from the driveshaft, engine and frame. After installing the new one in the reverse order, the ECU/TCM may have to be reprogrammed in order to recognize the new transmission.

Recommendations for Chevy Silverado 2500 HD transmission issues?

To save time and get back on the road faster, have your 17-digit truck VIN# handy and you can get an online quote for a reman Chevy Silverado 2500 HD transmission here, then find a local shop using our Find a Shop guide to install it for you.

How to Solve Chevy Silverado 2500 HD Transmission Problems

Solution A: Buy a Used Chevy Silverado 2500 HD Transmission

One of the cheapest ways to solve most severe Chevy Silverado 2500HD transmission problems, is to simply go to the junkyard and buy a used 4L80E / used 6L90 / used Allison 1000 transmission. They are fairly easy to come by, and most junkyards will give you a 30 – 90 day warranty. However, you don’t know the actual condition of the internal components inside that transmission, which means you could be in for even more problems than you have now. Plus, that warranty probably won’t cover labor charges if you have to replace the transmission a second time.

Solution B: Buy a Rebuilt Chevy Silverado 2500 HD Transmission

A rebuilt 4L80E / rebuilt 6L90 / rebuilt Allison 1000 transmission is definitely a better option. However, most mechanics will use an OE master rebuild kit, which takes the transmission back to its stock form, and usually does not address any of the factory design flaws. This means you’ll probably have the same problems in the future. And that warranty might not cover you if you are traveling and need work done at the local transmission repair shop.

Solution C: Buy a Remanufactured Chevy Silverado 2500 HD Transmission

To keep your truck on the road for as long as possible, a remanufactured 4L80E / remanufactured 6L90 / remanufactured Allison 1000 transmission is the best way to go. Most of them are built using much higher quality transmission parts, and modifications are often performed to correct for factory design flaws. This will allow you to get a much longer service life, and the warrantees are usually much better too.

Fair Replacement Transmission Cost by Vehicle

  1. Find your transmission model in the table below for fair prices from reputable suppliers. Also fair labor cost for local installation at a local auto repair shop.

  2. Not Sure Which Transmission You Have?
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Fair Remanufactured Transmission Price Ranges by Transmission Model Updated for 2019

transmission repair cost
Download Replacement Transmission Cost Guide PDF

What Problem Does Your Chevy Silverado 2500 HD Have?

Let us know the year, mileage and problem you’re having as well as any trouble (OBD) codes you’ve found. If you’ve been given a quote or paid for a repair, we’d like to hear about that too!

Leave a Comment


I just changed my transmission fluid in my 2015 2500hd. Diesel. It will not engage in any gear. 103000. Any thoughts

Dale Tracy

I have a 2010 2500hd 6.0 automatic trans. I was driving down the road and came onto a slow vehicle, the car turned and as I tried to get back up to speed it had stayed in a high gear the truck never downshifted. I limped down the road to a park and ride and tried to back into a parking spot the truck wouldn’t go in reverse. Does anyone know what happened?

Boss Man

1997 C2500 with 4L80E transmission. All original with 464k miles, with the majority of those miles the truck had a 30ft duel tandem gooseneck trailer hooked behind it. Changed the transmission fluid & filter every 75K miles or so since the truck was bought new in April of 1997. Over those 464K miles I’ve never even had as much as a hiccup out of that ole 4L80E tranny. That’s a far cry from the estimated 120K – 180K mile lifecycle of the 4L80E transmission.


Sometimes accelerating delays up to 5000 RPM before it ships in the third, sometimes when you’re cruising if you punch it and then let off gas the RPMs go up to the five or six thousand and hovers there do you have to punch it again to let it kick. Also almost at 4 complete or 5 complete second delay when you put it in reverse in the parking lot you can set and count before it kicks in gear.





James johnson

My transmission said idle truck transmission is hot the I got out to check it pulled stuck out and put it back in and transmission fluid went everywhere and truck would go so towed it to a hotel parking lot been stuck here for 4 days now yesterday I got in it and gave it gas and it makes awhinny sound then it stop and truck will move a little and give it more gas same thing winny sound the it will move I have 2013 GMC 2500 he 4×4 6.0 gas can some one help me out here I need a easy fix to get about 130 miles


My 2002 6.6 Alison transmission is not shifting into low gear or passing gear

Roger Harrell

2014 Silverado 3500 SRW, 27,000 miles. Transmission surge when shifting at low rpm. Tach will step when shifting, as if climbing stairs. Seems to go away at 2k rpm or more. Is this torque management, or trans issue? Did not do this when first purchased at 14k miles. Seems to be worse when air condition is on, or truck is under load at low rpm. Very annoying. I just desire a smooth trans shift, without surge jerk. Above 2k, trans seems to shift fine.


I have the same exact issue however I have almost 200k miles. Did you get it fixed? If so, what was needed?