GMC transmission issue
I'm not sure where to post this, but we have a 2012 GMC 3500 Sierra and a Cyclone 3010 5th wheel 35 foot toyhauler. Lately we have been experiencing "clunking" when the transmission drops a gear, ...
Forum Discussion
JustLabs wrote:
As far as the clicking noise,does it sound like a typewriter? If so,that's a common sound from a duramax. Most of them do it under the right conditions. Mine does it more for the first few hundred miles after an oil change.
There is a TSB from GM that says its completely normal.
A well known "characteristic" of the Dmax which is well documented on many forums. Mine does it to for the first few hundred miles after oil change. Most noticeable when pulling up to a drivethru. Just Google "Duramax typewriter"
