2004 Buick Rainier Q&A
2004 Buick Rainier Question: Fuel filter and spark plug
The fuel filter is located on the underside of your Rainer near the fuel tank. On your engine there are 4 spark plugs on each side. You will need to remove whatever you think is necessary to access the spark plugs. When changing plugs on your engine it would be a good idea to replace the spark plug wires also. With the 90k spark plugs it makes it very hard to get the old wires off the spark plugs without damaging them. - Russ
I have owened my Rainer for almost 6 years and it has 92,000 miles on it. It is not as peppy as it use to be. The Maint. manual sais to check the spark plugs and wiring harness at 100,000 miles. T...