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  1. [SOLVED] V8 Spark Plugs

    The 02-09 "How-To" and DIY Section
    Just did these a week ago and although it took me about six hours of scraping and squeezing my fat hands into the engine compartment, My gas mileage has gone up! If you do this, don't drop anything! There are some VERY hard to reach nooks and crannies right below the work area on the passenger...
  2. Replacing Spark Plugs

    OEM Issues
    Hi Everyone. I drive a 2005 TrailBlazer with about 76,000 miles. I want to replace the spark plugs and originally bought NGK Platinums ($3 plugs). However after doing some research (which I should have done prior to buying the plugs :duh:) I realized the ones in the manual are AC Delco double...
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