to the furtherest plug! Plug #1 is probably the longest wire
Honestly if you don't know where the drain plug is, don't mess with the vehicle then!
Below the oil pan. If you do not know you should not touch it.
Need to know the year. You will need to ask your question again with that info.
A 2009 Chevrolet Silverado with the 5.3 engine requires a .040" spark plug gap.
The Chevrolet 327 plug wire diagram can be obtained from most Chevrolet dealerships. The diagram can also be found in Chevrolet service manuals.
.045 plug gap.
Need to know what year and engine size.
.060
2004 Chevrolet Aveo 1.6L MFI DOHC 4cylThe Spark Plug Gap.044 (In thousandths of an inch)
18436572
.060" for platnium
0.035 in.