there should be a firing order somewhere on the engine usually is number one at tdc and then follow the firing order on the distributor you should get the manual and you will need a timing gun
4.0L OHV Firing Order
Firing order for the 4.0 liter OHV V6 is
1-4-2-5-3-6
ok i changed the oil and transmission fluid on my cadillac because it was saying on the dashboard anyways it still says to change the oil and trasn fluid is a cadillac seville sls with a 4.6 northstar engine