Service Engine Light On Problems of GMC Acadia

Service engine soon light comes and goes, took to mechanic and diagnosed with p0017 code. Cam shaft problem, mechanic put new part on and service light came back on. The problem now is timing chain and then get a new engine on a car that has approx 140,000 miles. The car experiences a jitter while driving and won't accelerate or lags when gas pedal is pushed.

See all problems of the 2009 GMC Acadia 🔎.

When I accelerate and get to 40 mph the car begins to shake randomly, intermittently. Then the service engine light came on, then the traction control shut off and the light to service traction control came on then the car drop the speed from 60 mph to 10-20 mph! when I tried to accelerate it did nothing ! the speed wouldn't increase at all then it started running fine and then a few miles down the road it did the same thing, dropped speed from 60 to 10-20 mph! I pulled over and shut the car off and when I restarted it the same lights were on and when I tried pulling away it would only go up to 10-20 mph for a few miles then it got up to 60 mph for a few miles just to drop again! I had my 11 month old grandson in the car that was dangerous! I was on townline road and manito blacktop that are very high traffic.

See all problems of the 2008 GMC Acadia 🔎.

I was driving the vehicle on the highway with a steady acceleration. I noticed the car start to shake a little and the tachometer fluttering until it appeared the car down shifted. I took the vehicle to the dealer where they test drove the vehicle and found no problems. The next weekend a long trip the vehicle was doing the same thing. I noticed it more on slight inclines with the cruise control on. At one point my brother driving behind me said he said a puff of black smoke come out of the exhaust pipe. I noticed the service engine light was flashing at times. Took the vehicle back to the dealer where they said the vehicle had codes p0300 and p0303. They replaced the #3 ignition coil. Since the vehicle was out of warranty, my total bills were $623. I should not have had to replace an ignition coil at 60k miles!.

While driving on the highway my service engine soon light started to flash. It stopped so I continued driving until I arrived home. It was diagnosed as premature timing chain wear due to a faulty oil monitor sensor and it was "repaired". The issue has continued to happen since and the vehicle has been returned to the dealership 3 times to attempt repairs. It was at this point that I started to research this vehicle and found out that gm knows of a random misfire issue after engine removal (mind you this was to repair damage due their faulty part to begin with). They don't know how to fix the issue--it can be electrical or you could replace just about every part under the hood and see if that works. But no guarantee that this will fix it as I stated earlier, they don't know what will fix it. I do not feel safe driving my family around in this vehicle any longer. We live in the north--hence the reason for an awd vehicle--and I don't want to get stuck somewhere, in below 0 weather with my children in the vehicle. I now own a very expensive vehicle that I don't drive far as I don't know what it is going to do. To me this is a safety issue and liability that they have tried to sweep under the rug like the rest of their issues of late.