Gently scrub the interior using a non-abrasive sponge or dampened rag, paying special attention to stubborn, greasy spots.
Rubber bushings need grease for protection and lubrication, but using the wrong type of grease (or too much grease) can ...
Diesel engines like the 3.0L Duramax require special maintenance, including the use of DEF, or Diesel Exhaust Fluid. Now, GM ...