Check your gas cap. If that is fine, check any and all vaccum lines, the EVAP system and any gas leaks.
Not 100% sure what is being asked, but do any lights come on after putting key in ignition? Or radio or any other thing that draws electrical current? If none of these things happen, you probably have either a dead battery or a battery cable grounding issue.
The spark plugs in the v6 can become an involved job as the upper intake manifold. The LS uses a Coil on Plug (COP) ignition system, meaning that the spark plugs are located under the ignition coil
ignition coils and spark plugs are your likely culprits here. I would also look into replacing your valve cover gaskets if your coils have oil on them.
Transmission Fluid? Coolant? Oil? Washer fluid? Usually you pull a plug and let nature take its course
The likely culprit for this is going to be the clockspring. From what I understand, it is a long and tedious job but it can be DIY if you know what you are doing. I can probably find the procedure for it if you would like
P1565 has to do with the cruise control system. If your engine is "missin," it would not cause it to throw this code. This code is more than likely caused by your clockspring going bad
V6 or V8?
For the 3.9 V8,
firewall
4 8
3 7
2 6
1 5
front of car
For the v6, I believe that it is this, but I could be wrong
firewall
4 5 6
1 2 3
front of car
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