4.3 Vortec Misfire

good information there brew. the tcc shudder was VERY common to see when i was working at new country. torque converter control solenoid would go bad causing that shudder and mimmick a misfire causing the ecu to “trick” itself and throw the p0300 code. the coasting uphill one doesnt seem to apply since he claimed to constantly be giving even pedal pressure…the oem injectors dont NORMALLY fail on these motors, but i have seen it happen a time or 3. either way… good luck getting it figured out.