There is a tool that replaces the dog bone upper motor mount that allows you to roll the engine forward which tilts the engine to give you more access to the rear plugs. you can also remove the upper mount and using a large bar roll the motor forward and block into place will do the same.
SOURCE: took spark plug wires off without labeling them
The ign coils should be marked. The front cylinders are 1 3 5 and the rears are 2 4 6..... the coils starting from the front is 1,4 5,2 3,6
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SOURCE: how to change spark plugs Pontiac Bonneville
Hi, Very carefully. You'll have to get on top of the engine to remove the back plugs.
Just take your shoes off when you do this so you don't break anything. Also prop the hood up so you can access the plugs better. Good luck.
SOURCE: where is a 2004 pontiac bonneville spark plug diagram
try looking in the owners manual. my buick le saber has one
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