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Has anyone replace this part(GM 20835504) ? How hard is it? It appears the exhaust manifold may have to be unbolted to remove the harness. Also, I know I have the option of cutting the end of the cable and replacing the terminals and I am still looking in to that option.
I have a new oem cable for the underhood battery cars I would sell. Im pretty sure the right exhaust has to be removed or loosened. Maybe more. I was told about a two hour job minimum on a lift. PM me if interested in the cable.
Has anyone replace this part(GM 20835504) ? How hard is it? It appears the exhaust manifold may have to be unbolted to remove the harness. Also, I know I have the option of cutting the end of the cable and replacing the terminals and I am still looking in to that option.
Thanks in advance.
Cut the OEM terminals off and put some good ones on.I did my about 7 years ago.Takes about 30 minutes taking your time.
I just did a cable replacement two weeks ago. Its not hard but it is a little time consuming. The battery positive terminal had corroded away due to a punctured battery and I had band aided it by chopping off the end and putting a clamp terminal on it. The hardest part is the starter and ground end as there is not much space between the downpipe and starter and block. I ended up removing it, then its easy. One exhaust stud walked out of the manifold so I replaced it, along with the gasket. Gasket and stud cost about 50 bucks at my local stealership.
If you do drop the down pipe, when you reinstall it, plug the oxygen sensor cable back together before you install the pipe, much easier that way, unless you have really tiny hands.
Last edited by Red86Cfour; Aug 14, 2018 at 10:48 AM.
From under the car, and using a mirror so you can see the nut, you can remove the positive terminal nut from the starter solenoid so you can swap the cables without having to remove the exhaust manifold..
With headers, it just easy to see the nut on the terminal instead.
Also note the bolt just above the starter solenoid on the block, and that is the negative battery terminal point for the negative wire to the engine, since the ac delco 20835504 comes with both the positive and negative cables.
Thanks for all the feedback. I lucked out and had just enough room after cutting the corroded terminal off to put a new terminal on and connect the battery. The info above confirms that I should look into replace the harness/running new battery cables when I install longtubes as it will be much easier to access with it apart.
C6 Battery Cable (20835504)
