hey i am wondering about three things after scaning my computer sorry never took down the code the truck is an 2005 with the lly

1. air intake tempature sensor what does it do and were it is located?

2. mass airflow sensor high voltage what makes this part so expensive and how do you know this is the problem?

3. Glow Plug circut cylinder 1 which cylinder is one, how hard is it to change and i went to the local parts shop and they can not get them were can a guy get aftermarket one?

thank you

1. it's integrated into the MAF
2. intake tube, just past the air filter on top of the duct
3. pass side, front. easy dealer best bet

does anyone know where the air intake tempature sensor is located

he told you already.. it is part of the mass air flow sensor.