I would like to think I'm a OK mechanic. Guess I'm one of the few.

Well sorry, but the ones around here don't do your kind a favor.

Now I'm getting the following codes.
1361
1362
0336

As well, the gas pedal is sunk down half way while the brake is fully up and firm.

P0336 https://www.gmforum.com/showthread.p...99#post1391435
P1361 https://www.gmforum.com/showthread.p...52#post1391299
P1362 https://www.gmforum.com/showthread.p...70#post1391398

All 3 mention the ICM. Start with checking the plug, make sure it'* clean and tight. check for damage on the wires, or replace the ICM

All 3 mention the ICM. Start with checking the plug, make sure it'* clean and tight. check for damage on the wires, or replace the ICM[/QUOTE]

The mechanic changed my ICM, what the hell gives?

This is the same mechanic your having problems with right? I wouldn't trust anything done by him. Remove all 3 coils, the ICM comes right off then. Make sure the base is clean. The base is the ground for the ICM. Put back together. The bolts holding the coils on need very little torque. Also make sure the plug is clean and drawn in all the way.

He charged 200 dollars for this job (included in the 502 dollars he charged)
Also, anyone know what to do with the pedal?

Check the linkages at the throttle body. A cable might have been knocked loose.

WOw, this guy went into my engine bay to solve one problem and caused all sorts of other problems.

We should be able to walk you threw each fix.

Hmm, I had my brother take the car out for a brief highway jaunt yesterday. It still has all the codes and such (I guess the car is also feeling the holiday spirit) and he took it up to 90 and there wasn't any hesitation on the way there. It seems to hesitate solely in city driving. Any ideas?