Chevrolet Avalanche misfire problems

Filed Mar 6, 2023 · Electrical · 280,000 miles · GA

The contact owns a 2007 Chevrolet Avalanche. The contact stated while driving at various speeds or upon starting the vehicle, the ABS, traction control, and check engine warning lights remained illuminated. The contact stated that the heater and air condition failed to operate. The contact also stated that the dashboard was cracked. The rubber padding for the wires under the hood and under the front driver’s side was dry rotted. The vehicle was taken to an independent mechanic to be diagnosed. The contact was notified of a major electrical malfunction and engine misfire. The mechanic stated that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 280,000.

Filed Sep 8, 2022 · Engine, Transmission · FL

Repeated instances of engine misfire/loss of power due to known issue with 5.3L Engines. Chevy/GM have repeatedly not fixed root cause/issues leading to "Stabilitrac/Traction control" error messages during engine misfire while driving in traffic. On 3 of these occasions loss power in roads/intersections with oncoming traffic. Two of these occasions,almost caused collisions. Currently truck at dealership since 4/11/22, with Warranty company (extended warranty) and Chevy dealership discussing mechanical issues with Rings, Pistons, Lifters versus "Carbon build up". Engine very low mileage per year. Total milage under 72k. Carbon is in all engines, failure root cause according to research and service department not related to carbon. In conversation with Service Manager, in past Chevy service departments followed guidelines of "Stick a plug and wire on it, and send it out". 3/19/16- 4/2/16: Issues started. Reported to Chevy performance issues. Did this on 2-3 occasions, air filter replaced one visit, told "without error messages, can not diagnose problem." 31k mile 6/18/16: "Stabilitrac/Traction control" error messages. Engine misfires start. Diagnosis fouled #7 spark plug. Spark plug replaced. Service department verbal comment, "Don't know cause, platinum plugs good to 100K, never seen this before"34k mile 2/21/18: "Stabilitrac/Traction control" error messages. Engine misfire in traffic. Diagnosis misfires with #7 spark plug. Service replaced valve cover with updated metal flap to stop oil from spraying on plug. Removed intake manifold/clean intake runners of oil deposits 7/31/21: #7 checked.No issues 53K 11/11/21: "Stabilitrac/Traction control" error messages. Engine misfire/ stall badly in traffic. Multiple misfires with #7 cylinder. Diagnosis:No issues found after error message reset.Truck perfect, passed inspection to purchase Extended warranty from dealership 4/11/22: "Stabilitrac/Traction control"error messages. Engine misfire/stall in traffic. Engine failure

Filed Oct 12, 2020 · Engine, Transmission · 89,895 miles · PA

Purchased a used 2011 chevy avalanche with 87,000 miles one owner from a small dealership. After having the vehicle for about a week noticed it shuddering when pulling any kind of grade. Thinking it was some kind of misfire had all the plugs changed only to find that it also had an oil file problem with 1 of the cylinders. When the vehicle would shudder it was around 1500-2000 rpms. If I would give it more gas it made it past the 2,000 rpms and would shift with no problems. Needless to say the transmission is now toast as it gave out completely and needs replaced. No warning lights of any kind made me aware of a potentially serious problem. After reading more I am seeing that the transmission is something that gm has not fully taken care of as stated with older models. The transmission failed while driving on a major interstate roadway while nearing the top of a hill. It just went completely into neutral and would just rev the engine. The truck was carrying 3 adults and 2 children in car seats when this occurred. Thankfully we were able to get to the shoulder of the road safely. Currently the truck has 89,995 miles on it. I only put approximately 2000 miles on it since purchase.

Filed Jun 15, 2020 · Driver assistance, Engine · 120,000 miles · MI

Vehicle has 120,000 miles on it and has a random misfire, with traction control and stabiltrack warnings and a flashing check engine light. Engine has excessive oil consumption and runs rough. Installed new plugs and wires, no change. After reading up on these engines I found out that the afm / dod feature is a common failure for these engines. Gm should step up and help owners with some of the repair costs. This is going to be expensive.

Filed Jul 23, 2019 · Engine · 142,000 miles · WI

Drove to post office, it was normal till I made a u turn on city street then engine ran very rough and engine light came on blinking, plus service stabilitrak & service traction control also appear on dash. Drove home immediately as truck wont shift to high gear. Check code and it said p0307 cyclinder #7 misfired look up google to see if I can repaired it myself as read to replace plug, wire and coil for cyclinder #7 so I did it still same problem. Took to mechanic to test my truck and fail compression test. Mechanic talk to me as I bought the truck last year and still paying for it. Describe to me of what is possible so told him to fix it he say that there are about 2000 truck which have same problem I have.

Filed Mar 24, 2017 · Driver assistance, Engine · 85,000 miles · MI

Engine runs rough at idle when engine light, service stabilitrak light and traction control off lights all come on. Upon acceleration, only engine light remains on. Will repeat at lower idle.

Filed Jun 9, 2014 · Acceleration, Brakes · 600 miles · RI

First few months experienced truck lunging forward whilst attempting to stop. Expressed concern with service dept. They stated nature of the vehicle performance. March 2013 called gm service #[xxx] after experiencing on highway @ 65 MPH the vehicle accelerating as I applied brake to slow down RPM's jumped to 4500 and accelerated. 3/21/13 mileage 24,565 was told by dealership no codes were found. Was referred by gm to tech specialist 3/26/13 @ 866 790 5700 ext. 32664 told to get second opinion then completely ignored by gm for follow ups. April 1st different dealership found code event stored in transmission control module from march 15th but no diagnostic was present, they cleaned the throttle body. Mid april 2013 brakes began pulsating on compression. Mid april frustrated and very concerned with safety called 800 lemon law found on line and kimmel & silverman advised gm / gm responded disclaiming issues. @ 28,429 miles 5/21/13 front rotors replaced and rear rotors resurfaced. Transmission dipstick tube fracture fix: pipe insulation & zip tie. 8/20/13 brakes pulsating again & spongy - vibration noted by service but not addressed.brought to specialist; right rear rotor grooved & left rear had chatter marks. 8/29/13 went to amco they found 4 codes in truck on gm scanner which dealership denied there were any. Sept. 2013 received bulletin " throttle position sensor may cause engine to run rough ". Getting no-where with gm or dealership and fearing for safety in oct. 2013 I opted to trade the vehicle at a great loss as it was my only transportation. Mind you this was my 2nd avalanche - the 1st one I'd had a front end accident; air bag never deployed, fortunately I was not injured and deemed the performance issues to be due to the accident and traded into this new avalanche. I have documentation for all of this and have lost over $30,000 due to gm negligence. Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6).

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 Jul 30, 2013 · Engine · 106,000 miles · MT

Misfire in cylinder 1.

Filed Mar 8, 2012 · Electrical, Engine · 77,912 miles · MD

Traveling at a normal rate and speed on a 5-lane highway. Vehicle loss power, engine lights activated. After maneuvering the vehicle off the highway, I shut the engine off. No signs of smoke or any leaks from engine (topside or underneath). I attempted to restart the vehicle and upon doing so the engine turned over and ran at a rough idle, clearly not on all 8 cylinders. I shut the engine off again. From that point on it was towed. The chevrolet dealership (after 8 days and 449 miles later) then told me they could not find a problem. When they received the vehicle the original codes had been taken by a precision tune mechanic (nearest facility from location of break down) the dealership then informed me they could not duplicate the problem and was apologetic for any inconvenience. I received a bill for $103.95 and my vehicle which had only a 1/8 of a tank of fuel. After a little research I found gm recall no:08048 consequence: may cause electrical features to malfunction. Thanks chevrolet and chevrolet service technicians for taking care of your customers. Unfortunately their dealerships and district specialist do not follow their own executive director of safety who is quoted on the gm website "we always want to make sure customers can count on the safety and quality of their gm vehicle." says, [xxx]. Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6).