2007 Chevrolet Avalanche transmission problems

Filed Feb 28, 2023 · Electrical, Engine · 195,000 miles · IN

The contact owns a 2007 Chevrolet Avalanche. The contact stated that while driving at various speeds, the vehicle stalled. The check engine warning light was illuminated and a message indicating that the vehicle was in Reduced Power Engine mode was displayed. The contact veered to the side of the road and turned off the vehicle. The contact stated that he disconnected and reconnected the battery and was able to continue driving. The contact stated that the failure had been reoccurring while driving. Additionally, the contact stated that the vehicle made abnormal clicking sounds. The contact stated that the check engine, traction control, ABS, stabili-trak and other unknown warning lights were illuminated. The contact stated that the transmission was slipping, and the vehicle would jerk while driving. The contact was able to continue driving. The vehicle was taken to an independent mechanic, where the spark plugs, brake light switch, and transmission oil filter were replaced; however, the failure persisted. The dealer and the manufacturer were not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 195,000.

Filed Jan 6, 2020 · Driver assistance, Engine · 85,000 miles · TX

Stabilty light came on, loss of power, check engine light, rough shifting into 2 gear. It has been down for 2 years. And not fixed yet, chevy dealership does not know what tpo do. There needs tobe a recall on the flex fuel. We were going down I-20 when all this happened. There was nearly an accident

Filed Dec 20, 2018 · Driver assistance, Engine · 50,000 miles · TX

We were driving down i20 when we were coming off the off ramp and the stabilization light came on and we got to the stop sign to turn right and as were take off it shifted really bad out into 2nd it jerked really bad and we had no power we made it home and now it turns over but will not start. 2007 avalance it has 50,000 miles. I have been talking to other people on car gurus and there are thousand on that sight having the same problem were having. And the sad thing is we dont have the money to have our truck towed into town and get it fixed. Becasue they tells us that they have so many people having the same problem. I feel like gm should do a recall or people should be able to do a group lawsuit toward gm for such a big deal like this is. And also our dashes are all cracked down the middle. Which on that sight there are alot having same issue.

Filed Nov 22, 2017 · Airbags, Electrical · 98,000 miles · FL · crash

Takata inflators:my air bag light came on, it was reset and came back on a short time after. I have electrical issues with cruise control, radio and fan for heat and A/C.once in s while I get a smell ofburning wire. My transmission began bumping on acceleration several months ago also when cranking it move forward a bit in park. The transmission bump is when accelerating, the electrical issues are random, the airbag light stays on.

Filed Feb 16, 2017 · Brakes, Fuel system · 97,000 miles · MD

Two weeks ago driving 60mph on highway in snow engine light illuminates and lose total power. "reduce power mode" illuminated but engine shut off. We almost got rear ended by a tractor trailer on [xxx]. On side of road for 2 hrs in 20 degree weather waiting on aaa (no shoulder on hway) and motor starts. Take it to garage and get throttle position sensor (tps) code ans stabilitrak/ABS code. We had accidentally hit the onstar button a minute before this and mechanic thought that was related so he cleared code and sent us on our way. For two weeks we were good andit happened again on highway in rain [xxx] this weekend, again in middle of highway. This time car started after five minutes. Took car to dealer and they state the tps needs replacing and front wheel speed sensor broken. There is a gm service bulletin #11273b where gm acknowledges tps issue and covers replacement of tps for 2008-2011 vehicles. Also bulletin pip3089b for bad wiring to tps for 2003-2006 avalanches. Gm denied my service despite the fact that a 2007 tps and throttle body are the same exact part number as the defective one. This is super dangerous and extremely frequent as there are 550 posts alone on [xxx] as well as many reports to [xxx] please assist as they are not standing behind a defective and deadly product as the computer cuts total power right on highway... Parts of this document have been redacted to protect personally identifiable information pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6)

Filed Nov 15, 2016 · Suspension, Transmission · 88,000 miles · SC

The truck would not move; feels as if the truck locked up while driving and came to an abrupt stop.

Filed Oct 29, 2014 · Transmission · 149,000 miles · WI

When the vehicle shifts from 1st gear to 2nd gear around 17mph there is a loud clunk, and it sounds like the transmission is having trouble. It doesn't shift smoothly. After looking online this is a common issue for the avalanches. Chevrolet knowingly put in a transmission that doesn't effectively do it's job. The curb weight of a avalanche is 6000lbs and my uncle owns the same truck, which has eaten 2 transmissions so far with the same mileage.

Filed Feb 23, 2014 · Electrical, Transmission · 207,990 miles · KY

When light comes on engine runs rough and shifts hard. When light goes off it runs fine.

Filed Feb 19, 2013 · Driver assistance, Transmission · 62,456 miles · TN

So I was sitting at a red light, everything was cool.. And when I started to accelerate the truck almost felt like we got rear-ended. Then when I tried to accelerate it felt like it had slipped into neutral. Drive is completely dead, when I put itinto drive, I get nothing. So I put it in 1st, and it worked, it went into gear. Then when I started to accelerate it made this horrible scratching/grinding/whining sound. So I can accelerate slowly and switch to 2nd, slowly, and accelerate slowly and switch to 3rd. 3rd feels good when I accelerate but then if I step on it, it slips out of 3rd back to that neutral feeling. If I try to accelerate quickly in 1st and 2nd I get that horrible sound and grinding feel.it is so many people having this same problem over and over. Some say the dealer charge them over $2800 plus to repair others say some dealers fixed the part in the trans called the forward sprag gear and everything was ok. Its crazy that so many people with the same problem. 95 percent of the trucks despite the mileage ( 30, 000 to 93, 000) on her truck did this right after the warranty was up. My truck 07 with only 62, xxx on it trans has now done the same thing as everyone else truck. Someone should force gm to recall these transmission and fix them. Word is they used the same transmission that's in mid size cars and light duty trucks and if so everybody will have issues with a full size truck and a light duty transmission!

Filed Jan 22, 2013 · Acceleration, Transmission · 78,267 miles · MD

I am a soldier with 17yrs of active duty service and I was home over the weekend for the mlk weekend with my family. I leave monday morning about 0900am to return back to my home station and my truck was driving fine, I stopped at a red light to make a left turn and when the light turned green I accelerated to about 5-10mph then there was a clunking noise and my vehicle would not accelerate anymore it would just send the rpms up so I drifted off the road and put my vehicle in park because I just had my vehicle serviced. I checked all my fluids and they all were fine so I put my vehicle in reverse worked fine, selected drive and it wouldn't move, selected 3rd gear wouldn't move, selected 2nd gear truck would move, and selected 1st the truck would move. There I was with my wife and my 2 daughters and mother-n-law on the side of the road in nc, luckily we didn't get that far from my in-laws home and they called a local shop that towed my vehicle back to her home. I have always wanted an avalanche but I get on the computer and I start reading about other people who have had the same problem and that is shocking, and to happen under a 100k miles. This is not my 1st chevy vehicle I have owned as well, I have owned a chevy trailblazer ltz that the four wheeled drive went out on that I purchase for my wife, so I traded that in for the 07 trailblazer ss that my wife really loved and that vehicle ended having an electrical fire from the wiring harness and my vehicle sat down at the dealership for almost a month until I notified them that something has to happen in which they let me trade that vehicle in for a honda accord in which I haven't had any issues out of that my wife is currently driving. In my reading last night when I finally made it back home after borrowing a car from my nephew that just happens to be another honda accord and I see all these stories posted horrible.