Loud engine in GMC pickup is normal
DEAR DOCTOR: I recently purchased a 2014 GMC Sierra pickup with approximately 30,000 miles. I really like the styling, ride, and the quietness of the cabin. All is good with the truck except the noise from the 5.3-liter motor: It has more than enough power and runs very well, but it sounds like my mother's old wringer washing machine. The dealer told me that the noise is from the high-pressure fuel injectors and is normal. This seems correct, since other similar trucks sound nearly the same. I am the kind of owner who tends to keep vehicles to over 100,000 miles. What has your ...