GMC OBD1 CODES CODE 42

94 Gmc Safari 4.3 Liters Has Codes 42, 67 I've Changed Ignition Control Module But Transmission Shop Says I Don't Have Power To The Trans...

Really Need Some Help

Hello My 88 Jimmy 4x4 4.3l Just Starting To Buck And Seems To Lose Power As I Reach 45 -50 Mph I Slow Down Start To Pick Up Then Does The...

I've Done A Complete Tune-up, Plugs Wires, Rotor And Cap. Changed The Fuel And Air Filters. About A Month After This The Truck Started To...