just recently swapped heads on my 2005 lsj put it in time 1 tooth off and didnt feel like doing it myself due to the wonderful pa weather so i took it to the chevy dealership to have them put it in time ... before i took it there it ran but ran rough now they have gotton me for almost 500$ to put the damn thing in time and on top of it, it is no longer getting spark. i just put new plugs in it, where should i start on trying to figure out why its not getting spark , cant afford to pay the stealership any more money to fix this .... it has to be something stupid

 

Make sure all sensors are plugged in. Check for codes

 

crank sensor...

 

Check connections and grounds first I'd say

 

tell them it ran when it came in and they need to find and fix what they messed up

there are to plugs that are the same i think it is the coil pack harness and the throttle plate if they mixed those up it wont fire

 

what would i need to do to the crank sensor ?

 

do you know of any other grounds other then the one on the valve cover that i could check thats the only one i know of and everything is plugged in

 

the crank sensor is right above the starter

 

i just ran codes on it and the only one it came back with was pcm keep alive memory , would that mean the pcm needs replaced?