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definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
39,475 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2006 Chevrolet Silverado 2500 transmission problems

transmission problem

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2006 Chevrolet Silverado 2500 Owner Comments

problem #16

Dec 182010

Silverado 2500 4WD 8-cyl Diesel

  • 23,000 miles


2006 Chevy Silverado hd diesel with allison trans-- transmission cooler lines leaking, dealer said there has been no known problem. I searched online and found hundreds of similar complaints. So I was forced to pay $700 to have the lines replaced, which will probably end up leaking again. This is obviously a defect, as I have 3 other Chevy trucks, none of which have ever leaked from the trans lines, and some are over 10yrs old.

- New Canaan, CT, USA

problem #15

Dec 122010

Silverado 2500 8-cyl

  • 52,781 miles
Transmission coolant line leaking.

- San Jose, CA, USA

problem #14

Apr 152010

Silverado 2500

  • 60,000 miles
My 2006 silverauto with the durmax engine and alison transmission. The transmission line have been leaking. I have 60,000 miles on it so the warranty is out. When I took it into the Chevrolet dealership where I purchased the vehicle they would not cover the leaks as part of the drive line warranty. When I purchased the lines from the parts department they indicated that they were selling a lot of these hoses due to leaks. If there are this many lines leaking I think Chevrolet should replace these faulty lines at there expense. Also I know of one other 2007 model that burned out the transmission due to these lines. Because the transmission failed Chevrolet replaced the transmission and the lines.

- Dutch John, UT, USA

problem #13

Aug 242009

Silverado 2500 Diesel

  • 80,000 miles


My 2006 durmax diesel 2500 truck has transmission hoses that run from the transmission to the radiator. These hoses have aluminum pieces on each end and they seep oil at the joint where the aluminum joins a piece of rubber hose in the centre. They continuously leak transmission oil on the ground at this crimp join. The colder the weather, the worse these hoses leak. I feel because of the damage this oil causes to our fish stocks and the environment these hoses should be recalled and replaced a Chevrolet's expense. To date so far, all attempts I've made to correct this problem, at kelowna Chevy or head office have failed. They are now interested. Please give advice.

- Kelowna, B. C. Canada, 00, USA

problem #12

Feb 262008

Silverado 2500

  • 25,578 miles
The contact owns a 2006 Chevrolet Silverado. The contact noticed that while the vehicle was parked, transmission fluid was leaking. The vehicle was taken to an authorized dealership for diagnostic testing where the contact was informed that the transmission hoses were leaking. The fluid and one of the hoses were replaced. The contact stated that transmission continued to leak and the dealer was scheduled to replace all three hoses. The failure mileage was 25,578. The current mileage was approximately 35,790.

- Cherry Valley, MA, USA

problem #11

Sep 302009

Silverado 2500

  • 85,000 miles
My Chevrolet 2500 has a function called grade braking to assist the brakes when towing a load down hill. It has quit functioning but the dealers cannot figure out how to troubleshoot the problem. They said since no codes show on the computer I have to wait until I have a trailer behind it and am near a dealer that is near a steep grade to test it. The whole point of the system it to keep the truck from running away on a steep grade. Doesn't sound like the place to test it. There are no steep grades with in 150 miles of me. There should be a simulated test run by their computer.

- Sneads Ferry, NC, USA

problem #10

Jan 082010

Silverado 2500

  • 41,550 miles


I had a transmission cooler line to fail and leak badly after 41,000 was caught in time to prevent transmission failure but how about the next one?it was replaced with a new part at the Chevy dealer.

- Amory, MS, USA

problem #9

Dec 162009

Silverado 2500

  • 20,400 miles
We purchased a Chevy Silverado pickup in 2006. My husband has babied this truck, never pulled anything heavy and has rarely had it in 4 wheel drive. In December 2009 the transmission started acting up, the truck at this time had 20,400 M/L miles on it and not much more at this time, yes twenty thousand four hundred. The warranty expired as it was 3 years or 36,000 miles. The dealership bill roberts cheverolet that we purchased this truck was in bolivar mo 60 miles from us, the warranty was out so we hired a local mechanic to do the job for us. He is a certified mechanic and has done warranty work for a Ford dealership in appleton city mo and other dealerships in the area. We knew that if we took it to the dealership it would cost us more than having it done locally and my husband did not want to haul it 60 miles or any miles to be repaired knowing that we had no warranty and no trailer to haul it on.. I felt like this should not have happened with the low miles on the truck and called the dealership. I spoke to the parts department who informed me that since we took it somewhere else other than them that we could not be helped but had we brought it to them they could have helped out with it due to the low miles, even though the warranty was up. Now a warranty is a warranty and is black and white, apparently there is also gray, which we as consumers are not aware of. So how were we to know to take it to them under the circumstances. How were we to know that there were gray areas in the warranty as it was not listed as so. We paid almost $1500 for this to be repaired out of our own pocket. I work 2 jobs so thankfully we had the money but if I wasn't it would have been a financial burden on us, especially at christmas time. My husband has taken his vehicle to the dealership for recalls to be repaired, they have a log of the miles listed at those times, and has faithfully kept it serviced.

- Eldorado Springs, MO, USA

problem #8

Dec 302006

Silverado 2500

  • 48,625 miles
2006 Chevy Silverado 2500hd has developed a transmission cooler line leak at the metallic coupler. Vehicle only has less than 50K miles under light load conditions. Never towed anything over 3klbs. I understand this is a very high fail item and even their improved lines are leaking as well. This should be a recall item and replaced at no cost to the customer.

- Virginia Beach, VA, USA

problem #7

Nov 152009

Silverado 2500

  • 63,540 miles
2006 2500hd, transmission cooler line leaking and both oil cooler lines leaking. Oil cooler lines were replaced in 2007 under warranty. Brought truck into dealer today, (23 Nov 2009) oil cooler lines replaced, transmission line ordered. Deal said that it is a known problem but Chevy will not recall. Are they waiting for a fire and death to occur? this is a know problem and should be a recall to replace these lines at no cost. Paid $437 today and will pay $262 on wed. When the transmission cooler line comes in. This is totally unacceptable.

- Rosamond, CA, USA

problem #6

Nov 122009

Silverado 2500

  • 27,830 miles


Leaking transmission cooler lines. Lines consist of a flexible section swaged to section of hard line. There are 3 lines total. All 3 have a history of leakage where the flexible section swages to the hard section. This has been a very common occurrence reported by other owners which can be easily verified through numerous online forums.I.e

- Bartlett, IL, USA

problem #5

Nov 012008

Silverado 2500

  • 35,000 miles
2006 Chevy Silverado 2500 hd w/allison trans. Transmission leak. Took truck to deal, deal fix 1 out of 3 lines under warranty. 4000 miles after dealer fixed first line, 2 other started leaking, deal would not fix other 2 lines stating truck was no longer under warranty. GMC should recall the vehicle base on possible fire.

- Troy, NH, USA

problem #4

Aug 202008

Silverado 2500

  • 46,000 miles
The ac has never worked. Took it to coutesy Chevy 3times. Still dose not work. Had to replace the wheel bearings. Took it there 2 times 4 that. Had 2 rebuild the transmission once. And now its acting up 10,000 miles later. This is a 2006 Chevy Silverado that I paid 25,000 $ for only 2 years ago.

- Salisbury, MD, USA

problem #3

Feb 012008

Silverado 2500 4WD 8-cyl Diesel

  • Automatic transmission
  • 20,000 miles
The allison automatic transmission cooler lines are leaking. This poses a fire hazard. GM needs to redesign the hoses that connect the transmission and transmission cooler. Many others are having this same problem and have had the lines replaced multiple times.

- Corona, CA, USA

problem #2

Nov 182006

Silverado 2500 4WD 8-cyl

  • Automatic transmission
  • 1,900 miles
I purchased new a 2006 chev. Silverado 2500 tk (6 liter eng.), at 1900 miles the transmission felt like it slipped. Immediately after, under light acceleration, you get a high pitched noise coming from the transmission. Took vehicle to local dealership and was informed that the problem was in the planetary gears of the transmission and GM informed them that repairs should not be performed. Meanwhile I still have the noise and am seriously concerned about the dependability of the vehicle.

- Thorndale, PA, USA

problem #1

Jul 112006

Silverado 2500 4WD 8-cyl Diesel

  • Automatic transmission
  • 400 miles
Starting 4 days after delivery of this new light duty truck with diesel engine and 6 speed heavy duty automatic transmission, the transmission has almost continually malfunctioned, causing what I believe are dangerous conditions putting myself, my passengers, other drivers, and pedestrians at risk. The malfunctions include acting like in neutral when starting from a full stop, causing the engine to rev, and then the transmission suddenly engages causing the vehicle to lurch, similar problems at the transmission searches for higher gears, even at highway speeds; the engagements are so hard I believe I am at risk should this occur on low traction roads, or on curves. Most disturbing is that moments after coming to a full stop (foot off accelerator), the transmission suddenly (on no fewer than 10 occasions) sends a surge of power to the drive wheels causing the vehicle to lurch. I am fearful that this malfunction may cause the vehicle to be propelled into a vehicle in front of my, or worse, pinning a pedestrian between this vehicle and a fixed object. Also shocking is that upon the vehicle being returned to me for the 3rd time on August 11th, within an 1/8 of a mile form the dealership, as I approached a stop the vehicle wheels suddenly locked up for a moment. I returned to the dealership and the service manager drove the vehicle. He repeatedly duplicated the problem and experimented by shifting into neutral, shockingly, while in neutral, the transmission still seemed to engage the drive wheels as we approached a stop. Only 42 days since delivery, and the vehicle has been at the dealer for service for 13 days, and has also continued to malfunction while under my control another 12 days. I believe the dealer, auto manufacturer, and the transmission manufacturer (who is said to be providing direct instruction to the dealer on diagnostics and repair) are placing me and others at serious risk of injury.

- East Syracuse, NY, USA

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