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There are some comments that you should not adjust the gap sizes of the plugs and use them the way they come out of the box. Hmmm .. I have a 1999 Grand Prix GTP with the 3.8L V6 supercharged engine. My GM owners manual states a gap of .060 for all the replacement plugs listed not only for my engine but for all Grand Prix engine sizes of that year 3.1 / 3.8 / 3.8SC Check your GM owners manual .. it will state there in the section of different replacement parts, what spark plugs to use and the gap size
What else can I help you with?
What size gap for a 93 Pontiac Grand prix 3.4?
The 1993 Pontiac Grand Prix 3.4 liter engine spark plug gap should be .028. Most spark plugs come pre-gapped from the manufacturer.
What is the spark plug gap for a 2000 Pontiac grand am 3.4 liter 6 cylinder?
.060 per Napa
Are there spark plugs in a 2.2 liter Pontiac sunfire?
Yes
Can a 2004 Pontiac grand am have a 2.2 liter motor?
Yes
Does a 2004 Pontiac grand am 3.8 have a timing belt or a chain?
The ( 3.4 liter V6 ) in a 2004 Pontiac Grand Am has a timing CHAIN
How do you replace a thermostat on a 94 grand am 2.3 liter?
information on how to change the themostat on a 94 Pontiac Grand am SE 2.3 liter
What is the oil capacity for a 3.1 liter Pontiac Grand Am?
4.5 quarts
Does a 2005 Pontiac grand prix have a timing belt or chain?
On a 2005 Pontiac Grand Prix : Both the 3.8 liter V6 engine and the 5.3 liter V8 engine use a timing CHAIN
Does a 2007 Pontiac grand prix have a timing belt or chain?
The 3.8 liter V6 and the 5.3 liter V8 engines used in a 2007 Pontiac Grand Prix both use a timing CHAIN
Where is the thermostat on a 2000 Pontiac grand am 2.4 liter 4-cylinder?
The thermostat on a 2000 Pontiac Grand Am 2.4 liter 4 cylinder is located on the side of the engine. It can be found by following the upper radiator hose.
Where is the idle air control valve on 3.8 liter 2003 Pontiac Grand Prix?
Where is idle air control valve located on 2003 Pontiac Grand Prix GT, 3.8 liter 6 cylinder?
What type of engine does your 1999 Pontiac grand prix gtp have?
3.8 liter
