2004 Yukon Denali, 6.0, automatic, 4x4. Occasionally when I leave from a standing start and press the gas pedal gently There is no throttle response. 99% of the time it's fine, but sometimes nothing happens. Tach doesn't go up so tranny isn't slipping. I haven't done plugs and wires because it's too darned cold in NH. There are no codes stored. Could this be the beginning of a faulty Throttle Position Sensor? Could the throttle body need cleaning?
I will be doing plugs on the next warm day as I know they can be responsible for all manner of issues.
Any input will be very much appreciated.
Thanks,
Bill