Chevrolet Avalanche owners have reported 12 problems related to transfer case (under the power train category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Chevrolet Avalanche based on all problems reported for the Avalanche.
Driving down the road the truck engine will be running with no abnormal sounds, smells, leaks but will act as if not in gear. Rpm's will rev but truck will not move. Only after putting truck in park (lots of grinding noises) then pressing the 4wheel button then back to 2wheel (sometimes through two cycles) the truck will back into gear and operate properly. Took it to a transmission shop put it on the diagnostic machine and no error codes were given to give reason why the transfer case disengages randomly. Replaced the transfer switch per shop recommendation "just in case"it was okay for about a month then once again issues started again just the same as before.
See all problems of the 2006 Chevrolet Avalanche .
2005 Chevrolet Avalanche. Consumer writes in regards to airbag and traction control service lights came on also the four-wheel drive stability system was disabled.
See all problems of the 2005 Chevrolet Avalanche .
Transfer case fluid leaking from a hole in the case caused by internal pump rub. All the transfer case oil expelled onto the hot exhaust causing smoke and possibly a fire.
See all problems of the 2002 Chevrolet Avalanche .
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.
2006 Chevrolet Avalanche 1500 4wd in 2wd hi, driving at 55 mph with transmission in d, engine revved freely as if transmission in neutral. Coasted to a stop onto shoulder, shifted into park, released foot brake, vehicle began to roll forward (downhill), apparently because transfer case shifted into neutral. Ses indicator not on. Turned off engine. No codes (had code reader in glove box). Turned engine on, shifted transmission into d and felt transmission engage (apparently, transfer case had engaged from neutral). Accelerated gradually and drove down highway for 1/4 mile and when accelerator pedal was released, transfer case shifted into neutral, again, engine revving freely with transmission still in d. Coasted to a stop on shoulder, pressed 4wd hi and felt transfer case engage, pressed 2wd hi and felt transfer case disengage but now in 2wd hi instead of neutral. Accelerated gradually and drove down highway and when accelerator pedal was released, transfer case shifted into neutral, again, engine revving freely with transmission still in d. Coasted to a stop on shoulder, and repeated above sequence on transfer case to shift into 2wd hi. Shifted transmission into 3, accelerated gradually and drove down highway, transfer case remained in 2wd hi. Slowed down to a stop on shoulder, turned off engine, restarted engine and shifted transmission into d, accelerated gradually and drove down highway and when accelerator pedal was released, transfer case shifted into neutral once again. After coasting to a stop, repeated sequence to engage transfer case into 2wd hi, shifted transmission into 3 and drove vehicle to mechanic. Still diagnosing issue.
When merging into traffic on the freeway, the truck went into 4 wheel drive low by itself, nearly causing me to have an accident. I was traveling at about 55 mph. I had to immediately pull off the side of the road because the truck would not shift out of 4wd. The vehicle manual states that the truck cannot be shifted into 4wd unless it is in neutral and rolling at less than 3 mph or major damage will occur. It also states that there are safety features that prevent the 4wd from engaging at any other time. Obviously there was a problem with the 4wd on my vehicle and the safety feature failed. The vehicle has been in the shop at the dealership 3 times for a total of ten days and all of the problems are still not repaired. I will be returning the truck there again tomorrow. They claim to have thoroughly gone over all of the problems and have repaired everything, but the 4wd system is still not functional. So far, I have been charged over $600. When I asked if this would ever happen again, the dealership assured me that it could not happen again because the part that failed had been upgraded. This tells me that gm knew there was a problem with this part and should have recalled it. A recall should be issued for these vehicles. All of the damaged parts on my truck should be replaced or repaired free of charge and my money should be refunded. After all repairs are completed, I should be given a warranty for the drive train of the vehicle. All of the parts repaired so far have not been completely rebuilt and I feel that the truck will give me nothing but problems with the drive train in the future. It's ridiculous that this could have happened; I could have lost control of my vehicle and had a serious accident.
See all problems of the 2004 Chevrolet Avalanche .
Complete transmission failure at 27,000 miles. Old part referenced as sun gear or sprag gear breakage between 4-wheel driver transfer case and transmission. Part failed under acceleration nearly causing a crash. Transmission would not engage gears except park. Vehicle could not move under its own power. Part is under back order and will take an unknown amount of time to fix. Other owners are experiencing the same problem around the same mileage. Gm was unresponsive to this common problem.
See all problems of the 2007 Chevrolet Avalanche .
Service 4wd comes on and truck reverts to 2wd, dealer has reprogrammed a few times unable to correct. When traveling down icy roads with no notice.
See all problems of the 2003 Chevrolet Avalanche .
A warning light stating "service 4wd now" appeared on my dash of my 2003. Chevrolet Avalanche. According to the owner's manaul, this indicates that there is a problem with the 4-wheel drive of my vehicle. Upon inspection at the local Chevrolet dealership, I was informed that there is a bulletin from gm stating not to do any repairs for this concern. My vehicle is now stuck in 2wd and gm does not know if or when they will be able to remedy this defect.
2003 Chevrolet Avalanche, driving down road service 4 wheel drive light comes on and vehicle is locked in all wheel drive, or 4 wheel drive. Light has come on 6 times, dealer has inspected several times, and cannot duplicate the problem. No correction has been made so far.
I had my Chevrolet available to the dealer three times to find oil spraying up on the drivers door they found a crack in the front differ. Said they put in some go in the crack and it doesnt need replaced. In my opion the casting in chevy avalnches are deffective and need replaced.
While traveling error code light for 4-wheel drive came on.
|Problem Category||Number of Problems|
|Power Train problems||
|Automatic Transmission problems||
|Transfer Case problems||
|Transmission Noise problems||
|Differential Unit problems||
|Transmission Failure problems||
|Axle Assembly problems||
|Power Train Driveline problems||
|Automatic Transmission Torque Converter problems||