2008 Chevrolet Avalanche Problems

What owners report

Owners of this model year most often write about the passenger-side airbag inflator recall and about the plastic dashboard cracking around the airbag cover and instrument cluster. A smaller but consistent group reports the 5.3L V8 using oil between changes, power door locks that stop working, and airbags that either failed to deploy in a crash or deployed without one.

1. 1
   Body and structure

   Dashboard cracks around passenger airbag

   • 87 complaints (34%)
   • median 75,000 mi at 8.4 yrs old (60 state mileage)
   • filed 2013–2022

   Owners describe the plastic dash pad cracking, often first on the passenger side near the airbag cover and above the instrument cluster, then spreading into holes and loose sections. Complaints frequently mention rattles over bumps, glare through the cracks when the sun hits them, and in a few cases a piece breaking loose and striking the driver. Some owners say a dash was replaced under warranty and cracked again, while others report the dealer or the manufacturer treated it as normal wear. Reported from under 20,000 miles to well past 120,000, with several owners noting the cracks appeared after years of sun and heat exposure.

   What to check: Inspect the top of the dash near the passenger airbag cover and above the cluster for hairline cracks, and press lightly for looseness or rattles. Ask whether the dash has ever been replaced.

   2 excerpts from owner complaints in NHTSA records

   “After a couple of years my vehicle developed several cracks in the dash, especially around the airbag. Yesterday I had the airbag recall performed. As a result of the repair, the cracks are now broken pieces. I now fear that in the event of an airbag deployment, shards of sharp plastic will be thrown into the air and could potentially result in severe injury.”

   NHTSA complaint #11405930, filed 2021-04, 62,600 miles

   “I drive my truck on the weekends only and at least twice a year I have to replace cylinder #7 spark plug all of the time, also got the oil pressure switch and the filter replaced twice and I get a tapping sound at idle due to the low oil pressure reading on the dash, and it has happen right after an oil change, last but not lease the cracking of the dashboard.”

   NHTSA complaint #11207001, filed 2019-05, 190,000 miles
2. 2
   Air bags

   Passenger airbag recall remedy not available

   • 100 complaints (39%)
   • median 87,045 mi at 9.9 yrs old (26 state mileage)
   • 3 mention a crash, fire or injury
   • filed 2012–2024

   Owners describe getting a passenger-side airbag inflator recall notice and then being unable to get the work done, because dealers told them the replacement part was not in stock. The complaints repeat the same cycle over months and years: calls to the dealer, calls to the manufacturer, and no appointment scheduled. A few owners add that an airbag warning light came on while they were still waiting. Reports run from the 2016 notices through 2021, at mileages spread from about 10,000 to 150,000.

   Recall 21V050000Recall 21V052000

   What to check: Run the VIN against open recalls and ask a dealer, in writing, whether the passenger inflator remedy has been completed on this truck.

   2 excerpts from owner complaints in NHTSA records

   “My vehicle has a takata airbag. I have inquired my local dealer to schedule a replacement for almost three (3) years. The only thing they have told me is that a remedy is not yet available. Seems odd as others I know have gotten their airbag replaced.”

   NHTSA complaint #11297116, filed 2020-01, 150,000 miles

   “Takata recall. Recall sent to me in july 2016 of potentially fatal flaw in passenger airbag. It is now november, 2018 (over 2 years later) and I have not heard anything to remedy this potentially fatal situation. When will this be remedied?”

   NHTSA complaint #11151239, filed 2018-11, 110,000 miles
3. 3
   Air bags

   Airbags fail to deploy or deploy without a crash

   • 66 complaints (26%)
   • median 69,000 mi at 9.0 yrs old (20 state mileage)
   • 5 mention a crash, fire or injury
   • filed 2012–2024

   Several complaints describe airbags that did not deploy in a collision, including frontal and side impacts where occupants were injured. A smaller group describes the opposite: bags firing with no crash, once after a tire blew out at low speed and once at highway speed with the passenger bag breaking the windshield and the side curtain following. Where dealers were involved, owners say they were told the repair was not covered or that no fault was found. Reported from roughly 5,000 to 190,000 miles, in both low-mileage and high-mileage trucks.

   What to check: Ask whether the airbag warning light has ever flashed or stayed on, and whether the truck has crash history. A shop can scan the airbag module for stored codes.

   2 excerpts from owner complaints in NHTSA records

   “Takata recall I have not received a recall notice nor has this problem been fixed. I had front end damage to my truck at about 40 MPH and the air bags did not deploy. I was traveling on an highway. By not deploying may have been a good thing. I would like for Chevrolet to correct this asap.”

   NHTSA complaint #10919216, filed 2016-10, 116,977 miles

   “We had a blowout on our 2008 chevy Avalanche. When the tire blew out, all the side air bags deployed. No crash happened! Only a tire blowing!! Going less than 10mph.”

   NHTSA complaint #11366641, filed 2020-10, 259,108 miles
4. 4
   Engine

   Excessive engine oil consumption

   Mentioned in 5 of 60 sampled complaints

   Owners of the 5.3L V8 report the engine using oil between changes, with one describing a quart or two every few thousand miles that got worse over time, plus blue or white smoke on startup and a low-oil message. Complaints describe the check engine light coming on, rough running and stalling, and diagnoses of collapsed lifters, camshaft wear or piston ring problems. One owner says a dealer first suggested more frequent oil changes before the engine was opened up. Most reports fall between about 70,000 and 145,000 miles, several after 100,000.

   3 related service bulletins

   What to check: Check the oil level and colour, ask for oil-change records, and listen for ticking at idle. Service bulletins describe how to measure oil use and note possible reasons for oil loss.

   2 excerpts from owner complaints in NHTSA records

   “Excessive oil consumption. Initial problem occurred on february 11, 2014 and GM dealer did some initial work, but the problem was not fixed. On april 27, the engine began running very, very rough and several lights came on (engine light, traction light, stabilitrac light and there may have been others). I immediately pulled over, checked the oil level found it was 1.5 quarts low, so I added oil and started engine again. So I had vehicle towed to my GM dealer. The next week, the dealer said they were looking into the problem. …”

   NHTSA complaint #10592977, filed 2014-05, 69,169 miles

   “I have a 2008 chevy Avalanche ltz with the 5.3l v8 engine with adaptive fuel managment. It was purchased used with 120k miles. It became apparent that the engine was consuming oil, 1-2 quarts per 3000 miles. Recently the engine started producing white/blue smoke on start up and oil consumption increased to 2-3 quarts in 1500 miles. My vehicle is currently at a mechanics shop and I am told that for starters I will need new valve covers that are redesigned from the original ones and that excessive oil consumption is common on this engine. …”

   NHTSA complaint #11383065, filed 2020-12, 142,255 miles
5. 5
   Latches, locks and linkages

   Power door lock actuators stop working

   • 8 complaints (3%)
   • median 41,000 mi at 4.0 yrs old (8 state mileage, few)
   • filed 2011–2014

   Owners report power door locks that stop responding to the key fob and the door-mounted switch, with the actuator still audible but the lock not moving. In some complaints the failure spread to three of the four doors, and one owner had an actuator replaced twice only for the problem to return. Owners say the door then has to be locked or unlocked by hand. Reported on trucks with roughly 12,000 to 42,000 miles.

   What to check: Cycle every door lock with the fob, the interior switch and the key, and ask whether any actuators or lock linkages have been replaced.

   2 excerpts from owner complaints in NHTSA records

   “The doors would not unlock after stopping & putting in park. I took it to the dealer & they replaced the actuator. It worked o.k. For a while & took it back & they replaced the actuator again. It continues to not unlock occasionally. I feel this could be a safety issue if the vehicle was involved in an accident or if vehicle were to catch on fire. I have looked on the internet regarding this problem and found several incidents on this topic but nothing from GM. …”

   NHTSA complaint #10493181, filed 2013-01, 22,000 miles

   “Electronic door locks have failed on three of the 4 doors on this car. The neither the key fob or the door mounted locking switch will toggle them between locked and unlocked position. You can hear the actuator trying to work but their is something wrong with the linkage preventing this. This is a major in convenience, as well as a potential safety hazard.”

   NHTSA complaint #10435552, filed 2011-11, 12,500 miles

Buying note. The two themes that come up most are the passenger-side airbag inflator recall and cracking dash plastic, so confirm the recall status with a dealer and inspect the dash before buying. Oil use on the 5.3L V8, door lock actuators and the airbag deployment complaints are also worth checking, and oil-change records help show whether the truck has been kept topped up.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.