i know a very good Chevrolet mechanic. His name is Naveed.. he has worked for 5 years at chevrolet and now running his own workshop at I&T center G-10 Islamabad. his contact number is.. 0321-5294274.... He knows his work very well. Give him a try..
Also there is another very good mechanic and electrician named Muzammil in Rawalpindi.. He is also expert in chevy cars. Having computer for all chevy models here. His address is Muazammil Chevrolet Motors, Chur Chowk, Rawalpindi.. His contact numbers are 0336-6667415 and 0315-2227415. he can also provide parts much cheaper than Aziz Autos or anybody else in Twin Cities. ..