info about the fuse from this kit

if you run a 10 guage wire as the ground  then that 4 guage wire is being wasted.

also... your dad has nothing to worry about with the big 4 guage wire, its only there to supply electrons, it doesn't "pull" anything more than it needs whether its a 4 guage or a thin 18guage wire, the 150 amp fuse is fine, it only ensures that if there is a short somewhere  that only the fuse blows and then no more current is being passed on from the battery....but on the same hand it is large enough to allow your amp to pull that much (which it wont) but it leave headroom for other amps or..god forbid you accidently touch your power and ground wires together... it won't blow quite as quickly as a 60 amp fuse...it will blow if there is a serious short  but not on those moments when we wern't thinking (we've all done it).

there ya go  keep the wire and ground in the back with 4 guage!! its all good   i've had gm vehicles before and actually have never heard of a problem due to the amp!!

once my car didn't start though because i had the battery terminal going on/off/on/off/on/off while trying to make it screw in...waited a few minutes and the computer reset itself... wasn't a problem!   good luck

the body of your car is grounded.. it is used as a "common ground" it makes ZERO difference to electronic equipment if you have an amp grounded to it..this is because of that whole wire size thing.  the sum of all the electronic components in the car (including your new amp) will not need more grounding to the battery than the stock GM cable provides. and the body of your car isn't he perfect carrier of electrons due to its atomical design, but thats rediculously intense theory!!

its good enough and there is nothing to worry about,

but now that you've experienced your first taste of car audio and installing, better have a good job, cuz its a nasty habit!!

Actually dude the body of the car has everything to do with a proper ground. A proper ground will have a resistance of below 1/2 ohm. If when you sand down the metal and attach your ground wire and meter it and find that you have 23 ohms of resistance, well that good old body of the car ground return is not all that great. If the ground return resistance can be made to get below 1/2 ohm then sure it is a good ground location.

The body of a car (primariliy GM's) is not a good ground return due to a combination of crappy metals, glued together unibody panels and real crappy weld seams or tack welds that hold seat belt nuts on.

A bad ground will cause all sorts of problems for an amplifier, like excessive heat, poor output, noise, protection mode and ultimitely failure of the power supply if the amp is prone to this (like a Rockford).

Thus again a proper ground will be checked and found to be below 1/2 ohm resistance, otherwise grounding to the battery may be the best bet. Most installers in the industry do not even check or have never been trained to check for this most important factor when grounding an amp. Do yourself a favour and get into the habit of always checking this reading.

oh yea

i realize that resistance will cause poor performance... i guess i wasn't thinking that there was a severe problem with this car

he should OF COURSE check the resistance, my honda shows .1 ohms from the battery to the ground i have in my hatch...and i (personally) havn't had a resistance problem with the 3 GM vehicles i've owned... but it should always be checked!!!  good call!