Wiring in mine was tiny bit different too. Becaue Australian built and not USA. Ron was super helpful though so sorted it easily. 

Should be fairly easy to push snake from footwell following the steering cable.  Remove the barrier in bilge at front of engine to get better visibility. 

16 minutes ago, uk_exile said:

Do as @justgary says. Or if you have heater you can use it to pull the new wires. Either direction works but often access to disconnect hose at heater is tricky so tape new wires to hose at engine, disconnect it from engine block, pull hose and wires into footwell, untape wires, pull more wire through, tape wires to hose and pull it back. Easy. While doing it pull through third wire as a draw wire for any future wiring installs.

I was fortunate and engine already had 'spare' engine temp sensor wired to dash. I recall wire being brown. I didn't need to add a new oil pressure sensor. Not sure why you're needing to do that. Different engine? Mine's Monsoon 340.

Engine hours is visible on PerfectPass display, and can also be read from engine ECM with appropriate tool, so I wasn't concerned about loss of that.

I fitted a Hawkeye 2BX to get depth, water temp and air temp.  See my 'after' photo link in post above.

Thanks, but I don't have a heater.   Ron let me know that 05 Malibus are some of the most challenging to convert (of course).  Something about how they experimented with the wiring during that year.  I'll have to play with a wiring snake to see if I can thread it down to the engine compartment.  A part of me is tempted to try resoldering the joints in the MDC which often fail.

Do as @justgary says. Or if you have heater you can use it to pull the new wires. Either direction works but often access to disconnect hose at heater is tricky so tape new wires to hose at engine, disconnect it from engine block, pull hose and wires into footwell, untape wires, pull more wire through, tape wires to hose and pull it back. Easy. While doing it pull through third wire as a draw wire for any future wiring installs.

I was fortunate and engine already had 'spare' engine temp sensor wired to dash. I recall wire being brown. I didn't need to add a new oil pressure sensor. Not sure why you're needing to do that. Different engine? Mine's Monsoon 340.

Engine hours is visible on PerfectPass display, and can also be read from engine ECM with appropriate tool, so I wasn't concerned about loss of that.

I fitted a Hawkeye 2BX to get depth, water temp and air temp.  See my 'after' photo link in post above.

1 hour ago, justgary said:

Since the Sunsetter is one foot longer and has 3 inches more beam, I would be surprised if the interior layout is the same.

Did you contact GatorStep and ask about sending your own pattern?

I did reach out to them and will most likely have to go that route. 

1 hour ago, JeffK said:

I mentioned something about this earlier in the thread. They can....   

And I'm not saying that anyone would refuse the work, but they will definitely prioritize their customers first. And if I'm a dealer, I'd be making sure every ounce of warranty work was preapproved by Malibu before I turned the first bolt. That could take some time. This industry is not like the car industry at all. 

These are not everyday necessity items. These are luxury and high performance items. 

Yes, they are luxury items, it doesn't mean you just throw money at them and accept whatever the dealers/Malibu is forcing on you.   I still don't understand losing money on a warranty repair.   

1 hour ago, oldjeep said:

I'm thinking, maybe stop buying if the quality is so low that warranty work is even a consideration.

That will be the outcome if they don't stand behind the product.   As a dealer would you want to sell a product that will have issues and that you'll lose money on fixing?   I'll ask again like in my original post: why is warranty work tied to the purchase in any way?