Eight problems related to engine and engine cooling have been reported for the 2005 Chevrolet Avalanche. The most recently reported issues are listed below.
Cluster gauge is not read properly all reading are all over the place.
Cylinder heads cracked due to poor casting (known issue by gm). This led to coolant in the engine causing damage to lifters. Expected cost to fix is approximately $1,500 in parts up to $4,000 in labor.
On 12/22/12 @ 5pm- shortly after entering onto the freeway, I started losing power. I didn't get higher than 50 mph before the rpm started increasing & my speed started decreasing. I got off the freeway, at the first exit, approximately 2mins after the beginning of the loss of power. Found a mechanic that was just closing his shop & asked him to give a quick check too see if I could continue my drive home, 32mins away. The mechanic checked under the hood & under the bottom & guesstimated the problem to be the flywheel. The mechanic also recommended no driving til repaired. I got my Avalanche towed home that first night. I towed it to my local auto repair shop on 12/24/12, to get a full diagnostic. I was advised by my local mechanic that my 2005 Avalanche w/ 96319 mis, needs a new transmission. My local mechanic advised it may still be under warranty due to mileage, but I have since found out the warranty is 5yr/100000mi. Gm is aware of premature transmission failure on the Avalanche, but is not fixing it for the consumer. Something needs to be done to protect the consumer!.
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.
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.
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.
The body mounts have gone out twice on my avalance.
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.
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