'04 GMC 2500HD 6.0 8500 miles
Every once in awhile,after driving 25+miles,when I come to a stop,tach
drops down to about 500 rpms and the motor starts to shake.Never died
It started right back up,and has been fine since.
I didn`t see a service engine light or any other lights,but did scan for
codes anyway.There were non.
I know it`s under warranty,but I`m sure if there are no codes,dealer
will have it all day and find nothing.
Any ideas or things to watch for?