Print this page Notes: It didn't take long for the cladding to fade, discolor, and in some cases crack. Cladding is the protective plastic piece that runs along the outside of vehicles, and exposure to both heat and UV rays give the Avalanche's cladding a chalky, faded appearance.

Owners have said the problem is especially bad on the panels near the cargo bed. Eventually, GM agreed to a one-time treatment of ArmorDillo, a protective treatment similar to what you find in any auto shop. Unfortunately, that would only help for 6 months (on average).

Eventually, GM offered another coating solution for owners within the 3 year / 36,000 mile original warranty under TSB:04-08-111-001C.


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
32,496 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.

2005 Chevrolet Avalanche engine problems

engine problem

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2005 Chevrolet Avalanche Owner Comments

problem #7

Nov 182014


  • 37,000 miles


Right after the warranty expired the transmission went and I had to rebuild it. At the shop the techs told me it was due to cooling, and they installed a small cooler because they said the cooling was not sufficient.

- Miami, FL, USA

problem #6

Aug 132005


  • 14,680 miles
Vibration in the engine at 50-58 mph, found water in in transmission. Replaced torque converter and reconditioned transmission. Still experiencing leaks at 57K, fluid was replaced and flushed and minor slipping in first gear.

- Murrieta, CA, USA

problem #5

Dec 072011

Avalanche 8-cyl

  • 78,000 miles
Traveling home from work on the interstate at regulated speed (65mph). As I started to accelerate to maintain speed gingo up a hill, the message "transmission hot" came on the in-dash display and engine began revving as if not in gear. I could not accelerate and had to turn on flashers and merge to safety lane on right. I continued to slow down until I could engage the transmission again at around 30 mph in 3rd gear. As soon as I started to accelerate past 35-40 mph, the transmission slipped again and would not engage any gear. This happened all the way home so what should have been a 20 minute drive turned into an hour. I couldn't get above 35-45 mph without this happening each time which made navigating the hills of northern va in the rain not very fun for me nor the hundreds of frustrated drivers behind and beside me. As I pulled into the driveway and parked, I could notice a 'burnt and sour" smell...most likely transmission fluid. I didn't see any leaks or drips but the engine was extremely hot as was transmission and transfer case. This has been happening off and on for a few months now but in very limited occasions and never for more than 10-20 seconds so I haven't contacted a service station but will definitely do so this weekend as I am unable to leave work during the week for this issue.

- Woodbridge, VA, USA

problem #4

Aug 122010


  • miles


I have a 2005 Chevrolet Avalanche that the driver side blows hot and the passenger blows cold sporadically. I have read that many people have had this same exact problem. I have only owned the vehicle a few months at it has happened approximately 4 times already. I will have to replace one of the actuators to repair. This should be a recall as it is a widespread problem.

- Semmes, AL, USA

problem #3

Feb 052009


  • 38,000 miles
The body mounts have gone out twice on my avalance.

- Rocklin, CA, USA

problem #2

Nov 202009


  • 58,290 miles
The contact owns a 2005 Chevrolet Avalanche which was purchased on December 31, 2007. She stated that the heater on the vehicle failed. A certified mechanic found that coolant was being utilized but could not determine where. Upon further investigation, her mechanic found coolant and several cracks in the head gasket. There were no recalls for the failure. The failure and current mileages were under 58,290.

- Butler, KY, USA

problem #1

Mar 152005

Avalanche 8-cyl

  • Manual transmission
  • 1,500 miles
On 3/15/05 the new GTO oil pump failed. Returned to dealer on 3/16/05. On 4/07/05 the car was returned to us and we were told it was perfect!the next day 4/08/05 the car was returned to the dealer. The car was repaired that day, and we were told it was now fixed!!! two [2] days later on 4/11/05 the car was again returned to the dealer. The car is still at the dealer, it is not fixed, it is a piece of used and repaired, broken car. We paid for a new 4oo hp GTO, and now after all this agony have had to pay an attorney $4000 to get this mess taken care of. This car on the first day of ownership had a problem with all the windows, execpt the windshield, a spotty and discoloring. This I reported that day. This is a joke, GMC will not help it's customers for any reason. The dealer, early on in this mess asked GMC to exchange cars for me, nope! they said it has to go thruogh the process. The process is a failure!!!! now I want my investment plus!!! your costomer service is a joke!! I was guaranteed answers to my questions and promised a call back and it never happened!!! one gentleman Mr. Jarret, said " I will call you in 10 [ten] days. So I can get to the bottom of this. May fisrt was 10 [ten] days. I had to contact Mr. Rick wagoner's office 7 [seven] times before Mr. Jarret retuned his promised call! I can go on and on with documation about the wat this was mishandled. We wre treated as lairs. While the whole time it was GMC>

- Moorpark, CA, USA

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