Number eight is the rear passenger side. Pass side 2-4-6-8
Drivers 1-3-5-7
Number one spark plug is closest to the radiator.
.040 inch
If the radio was put in at the factory then no.
The gap specfications are listed on the emissions sticker under your hood for a 2004 Jeep Grand Cherokee Laredo the gap is 0.035
located inside the steering colum on the top.
For a NGK plug Part #NG7100, MFG# 7100, the stated gap is 0.04
1-6-5-4-3-2
There's an access window on the backing plate that's cover with a rubber plug.
2.4 engines ,gap is .040 and 3.7 engines, gap is .035.
A 2000 Jeep does not have a torque converter drain plug.
Number one is driver side front.
17mm allen wrench, the transfer case takes a 10mm allen.