Well first u need a flat head screwdriver and the regular phillps screw driver and maybe a small ratchet or a small screwdriver . Take the flat head screwdriver and pry out the ac vents all four and then you should see four holes with a phillps screw in them. Take all four of them out and if you look on your dash where the vent is you should see three phillps screws I belive , take those off and it should slide off and the top of the dash should be off and your delcos should be seen. Ur gonna need a small screw driver or a angled one to get those screws off the speaker mounts. Becareful not to pull loose your ac vents off the top dash when taking it off. I usually slide it towards me and I usually stop pulling it when it hit the steering wheel. Good luck
Its a mission and a pain cuz of the clearence from the dash to the window but at least your not changing a water pump lol.. if u nned more help let me knnow. The ac vents slide back on no problem but make sure you slde it back on right . The way to tell if you don't the ac vents will look uneven thru the vents. And the top screws won't go in .