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The spark plugs are located on top of the engine beneath the plastic cover. There are 5 plugs. The plugs are in line across the top of the engine and are recessed. You must have a 5 inch extention for your ratchet. Because of the firewall on the back of the engine an 8 inch will be too long, but the 5 inch will fit and work. I have worked on several of these engines and the plugs in every engine were nearly burned out ranging from 61,000 miles to 96,000 miles. (gm truely lied to consumers with regard to plug life) a/c delco is the best plugs for replacement but they need to be changed every 60,000 miles if your fuel choice contains ethenol. (lucas tuneup in a bottle works wonders for cleaning the entire fuel system and plugs) be carefull not to over tighten any bolts u may of removed. Go slow watch what you're doing and you wont have any trouble replacing ur h3 plugs. Good luck... Will at dorite motors
What else can I help you with?
How do you replace 2006 hummer H3 spark plugs?
go to a shop
Which is less expesive the hummer h2 or h3?
Hummer h3 is Hummer h3-$30,900 Hummmer H2-63,000
Hummer H3 target market?
The Hummer H3 is no longer in production.
Does the Hummer H3 have a timing belt or chain?
The Hummer H3 has a timing chain.
Does the hummer h3 have timing belt or chain?
The Hummer H3 has a timing chain.
What is the difference between the hummer and the hummer h3?
The H3 is a smaller version of the traditional Hummer. The H3 has beter fuel economy and is more geared for urban life when comared to the traditional hummer.
Do they still make the smaller hummer h3?
As of my last update in October 2023, the Hummer H3 is no longer in production. The H3 was discontinued in 2010, and the Hummer brand was put on hold until the revival of the Hummer name with the electric Hummer EV. Therefore, the smaller H3 model is not being manufactured anymore.
Where can one purchase accessories for the Hummer H3?
Accessories for the Hummer H3 can be purchased from the dealer which it was bought from, or directly from the manufacturer. Some Hummer H3 accessories can also be found on Amazon's website.
What is the spark plug gap for a 2006 Hummer H3?
Not exactly sure but it probably says under your hood on a sticker.
What company manufactured the 2008 Hummer H3?
The 2008 Hummer H3 was manufactured by General Motors at the Shreveport,Louisiana factory. The H3 was the smallest of the Hummer models and the first one to be build by GM.
How many hummer h3 were made in 2010?
In 2010, approximately 6,000 Hummer H3 units were produced. The H3 was part of Hummer's lineup until the brand was discontinued in 2010 due to financial difficulties. The production of the H3 ceased later that year, marking the end of the Hummer brand as a whole.
Where are the spark plugs located on a 2006 H3?
"http://wiki.answers.com/Q/Where_are_the_spark_plugs_located_on_a_2006_H3"
