Search the Community
Showing results for tags 'knocking & pinging'.
My 2014 Sierra Crew Cab, 2WD with the 5.3L has a pre-ignition issue (detonating, knocking & pinging, rattling, dieseling, etc. -- pick the term you want to use). Has anybody else had this problem? This occurs regularly (but not all of the time) at 1/2 to 3/4 throttle while accelerating. It's not something that happens all of the time so it is tough to pin down exact conditions to duplicate the issue. Of course my local GMC Service Department "can not duplicate" the problem. I understand that most people (and I suspect most of the mechanics at the dealership) have no idea what pre-ignition sounds like, and since it is not setting any trouble code, I can't get any traction on getting the problem fixed or even acknowledged. Since the problem seems to be intermittent I've gone so far as to document the dates and times of the issues and ask the dealership to pull the vehicle run history and see what was going on during those times. This has fallen on deaf ears as the service department is unwilling to take this information in an attempt to identify the problem. The ECM has been re-flashed several times without any improvement. On several occasions I have dropped the truck off at the dealership, given them a punch list of things to do/fix (including looking into the pre-ignition problem) and they always come back with "unable to duplicate". I have contacted GM Customer Service and have a Case Number, but that has gotten me nowhere as all they tell me to do is to take it to the dealership. I plea my case that my local dealership does not seem very interested in fixing the problem and I even stopped by the dealership when the problem was occurring to take a the service manager for a ride so he can hear the "knocking and pinging". The manager stated that he was unable to ride with me because he was the only service writer available at the time and I would need to come back. However, before he finished telling me to come back, another service writer showed up at the counter, but the manager would still not go on a drive with me to identify the problem. I'm not sure what the action plan would be if a service writer or technician ever "hears" the problem, but my past experience tells me they will still not acknowledge the issue, or state that the noise is from some other component that is working "as intended". An engine that spends its life with a pre-ignition problem is not a high mileage engine. I'm sure it will make it through the powertrain warranty period before it kills itself by way of detonation, and that concerns me. Does anybody have any suggestions on getting this moved up the ladder in GM Customer Service where I can actually get GM to look into the problem? Thanks.