I am trying to replace the valve covers on a 1997 4WD blazer. The driver's side was pretty straight forward and I think I was able to get all the obstructions out of the way of the cover. However, the passanger side has some wire harnesses andsome hoseson top that clearly present an obstruction for the removal of the cover. I am able to move the hoses out of the way, but the instructions thatI have don't mention how to remove these wires.
I would greatly appreciate it if anybody who has had experience with valve cover removals on a 4.3 vortec engine could help me out!

 

Take the throttle cable of the throttle body return spring unbolt the throttle/cruise bracket leaving cables on it move it out of the way. Been a long time for me you might have to remove the alternater can't remember for sure. you have to remove the pcv valve and all other wring and hoses everything is easy to take off and its pretty staraight forward

 

It does not look like I have take the alternator out, but I managed to take the bracket that is attached to the alternator. The hoses are already out of the way. What is left is evac test port and thick cables that will not move out of the way. I started to wonder if those cables are supposed to be there above the valve cover to begin with. I could start taking off connectors in the hope that I will be able to move the wires, but there are quite a few.
Please also note that these are on the passanger side. The driver side is pretty much free for me to remove the cover.

 

The wiring harness probably goes to the PCM and could be unbolted on that side and lifted out of the way.

 

Thanks. It looks like if I take the wiring harness from the PCM and undo a few more connectors andlabel everything correctlyI should be able to lift the cover with no problems.

 

I didn't have to go near the pcm or unplug wire harnesses to take mine off.

 

I had do unplug about 10 wiring harnesses to take the passanger side valve cover off, but it is all done now. Thank you all for all the replies. And yes the alternator being off helps the removal.