I try to install a sub and amp to lexus es300(1994) and I'm just wondering if there's a video show you how to do it.

MOunts for what? Engine, Transmission, body mounts?

Victor, I will post links below, for your manuals. Could not find any videos to show process.
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Infiniti G20 Factory Service Manuals NICOclub

https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=11&cad=rja&uact=8&ved=0ahUKEwiOgbfm_5XLAhWLox4KHVXqA2YQFgg_MAo&url=http%3A%2F%2Frepair.chiltondiy.com%2FInfiniti%2FG20%2FRepair-Manual-Online&usg=AFQjCNHiWjDwV1H29RBiT1aqS4tlzvYTbw

https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=14&cad=rja&uact=8&ved=0ahUKEwikmdqCgJbLAhVJLB4KHZSUDYoQFghRMA0&url=http%3A%2F%2Frepairmanualssearch.com%2Fcategory%2Finfiniti%2F&usg=AFQjCNG4yOGxXjLqrzhcEXNKokYk-SDp2w

Repair ManualsFor Infiniti G20 Lexus GS300 SC400 and Toyota Paseo

If you do not have your instruction book, there is often a diagram on the cover flap of the machine. Failing that try your local machien dealer they should show you how to thread at no charge. let me know how you go and I'll see what I can find.

Sub Amp with stock head unit write up JKowners com Jeep Wrangler JK...

I included a link which provides information on the hook up. It is not specific to your car, but it may have some good pointers.
You haven't specified what problems you are having with the hook up. If you provide a detailed description of the problem , I may be able to help further.

where 2 find d ac fuse

I would suggest you watch some YOU TUBE Video
on that subject & try & find your exact vehicle on that site.

It is a good place to go for an education

Problem sloved. Get this guys video. I did, saved me thousands. He works on a 2001 Lexus RX 300, but I'm sure it will work on your vehicle. He shows your where to buy the lifts brand new for $21 a piece and walks you through the installation. Here's a link. http://www.youtube.com/watch?v=Fmo-WcinNhU

chev stock radio does not have extra plug in for sub. to run your sub, im assumed you also going to run an amp to it also. there are no addition plug in in the back, but that does not stop anyone if you know how to rig things. i would not recommend rig wires on your 2007. I would install a new radio before rigging that car; than add a sub. keep in mind most of GM radios come with stock amp built into the radio itself. If you cut the wires from the radio and wire it to your sub amp you will get nothing but distorted sound. anything sound goes to any amp need to be pre-amp in order to work properly. hope that help some

in 1990 LS400, the amp is only for the sub, its located between the fuel tank and trunk liner. you can reach it by removing the trunk liner which cover the fuel tank right behind the rear seat. hope this helps

there is an inline fuse running to the sub try locating it and replacing it it also may have cam out of its socket.