You need to get a fischer body manual on your car. Surf a little to find one. There are several places out there that have them.
The headlamp fuse on a 2004 Chevy Impala is located in the main fuse panel under the dash. It prevents the headlamp from drawing too much power or being damaged by a surge.
behind fusebox drivers side
See Headlamp Assembly removal, under Section 5: Service and Appearance Care - Bulb replacement, on page 5-53 of your "Owner's Manual"...
Answer In owners manualIf you have the owners manual for the car, usually the specifications section will give you the answer to y9ur question. Go to : chevroletforum.com - Impala - Sticky : Impala light bulb number/sizing guide...
In the electrical fuse/relay box under the hood on top of the L/F fender well.
See {Headlamp High/Low Beam Changer} in your "Owner's Manual", under Section 3: Instrument Panel Overview.....
I would also like an answer for this question.
See Fuses and Circuit Breakers, under Section 5: Service and Appearance Care - Electrical System on page 5-95 of your "Owner's Manual".....
I did some searching on the internet for the same thing ,headlight aiming on my 2003 Impala. I found out there are no horizontal aiming screws (thanks GM) and the vertical ones are the screws on the top of the headlamp assembly. Just pop your hood and you should see those vertical screws no problem.
See Headlamps, Front Turn Signal, Sidemarker, and Parking Lamps on page 5-48 of your "Owner's Manual, under Section 5: Service and Appearance Care - Bulb Replacement...
I personally don't know. This link is for one for sale. Visit their store and ask them. They should know. http://cgi.ebay.com/ebaymotors/1959-60-Chevy-Impala-headlight-switch-knob-542s_W0QQitemZ110128128030QQcmdZViewItem#ebayphotohosting Good luck. Dave
The Headlight Relay, identified as HEADLAMP, is in the Driver's Side Instrument Panel Fuse Block. Just pull it out and replace with new one. See page 5-96 of your "Owner's Manual" for location...