SPECIAL THANKS:
Mobil Delvac: mobil.us/USA-English-LCW/heavydutyengineoils_products.aspx
Barkley GMC: barkleygmc.com; 877-827-1716
PART II
Mobil Delvac helps keep Big Red's
maintenance costs down while extending drivetrain life; helpful service tips for all GM 3500HD 4x4 duallys used in severe-duty environments
By Bruce W. Smith
28 PROPICKUP June 2012
