One problem related to engine grinding noise has been reported for the 2003 GMC Envoy. The most recently reported issues are listed below.
Gas tank back spits when filling at station. . . Goes all over ground rear access window pops open when driving passenger window mechanism broken and glass pieces formed in door. Mechanism failed to raise and lower the window. . . Causing a grinding sound. Replacement was costly and unecessary for me the car owner. Should work for years without failure.