One problem related to engine has been reported for the 2006 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 GMC Sierra 1500 based on all problems reported for the 2006 Sierra 1500.
4. 3 engine started shaking for not apparent reason, mileage at incident 10,000 miles. Engine rpm's would go up & down at idle & rough idle it did this for a couple of days. Engine shook violently and jerked. The vehicle stopped running would not turn on. Vehicle towed to dealer. Dealer had to replace ecm (computer) & crank shaft sensor. Vehicle after two weeks is now rough idle at times at start up & rpm's at idle still vary at times. Vehicle taken in to dealer and tech stated no hidden codes vehicle checked out okay according to dealer???.