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How to change spark plugs on a 2000 4.3 liter gmc sonoma engine

Posted by Anonymous on

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Hello,
My check engine light came on Saturday while driving. I have a 2000 GMC Sonoma 4.3L. I stop at Advance Auto to have it check and the man said the #6 spark plug was misfiring.

He suggested that I change the spark plug; which I did the next day ! Then the check engine light came on again, and I had it check. This time it show my #3 spark plug is misfiring, and I'm not sure what to do now ?

Posted on May 07, 2014

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Posted on Jan 02, 2017

jasonrwagner
  • 14 Answers

SOURCE: Spark plug gap on a 1992 Gmc Sonoma 4.3L V6 FI

Usually somewhere on the engine or in the engine compartment, there is a sticker with the engine specifications. The spark plug gap should be included. If not .032 or an inch should be close.
Good luck

Posted on Jun 26, 2008

  • 56 Answers

SOURCE: do not know where spark plugs are located in motor

the spark plugs wires are directly located on top of the engine and the spark plugs are down inside the holes in the valve cover itself. I believe there are also 2 coils on top of the engine, which hide two of the spark plug wires which are attached directly to the underside of each coil, remove the coil pull it upward carefully and you will find the spark plugs for those two in the hole underneath the coil for each one. If you decide to replace the plugs, make sure to check the spark plug gap even if they tell you they are pre-gapped as pre-gapped spark plugs are usually gapped for more than one particular car and it may be incorrectly gapped for your specific vehicle. If you decide to also replace the spark plug wires, you will have to purchase the spark plug wires for the underside of each coil seperately because most local auto parts stores only sell 2 spark plug wires in the set that go onto the non-coil attached wires and plugs, and you have to purchase the coil spark plug wires seperately. So all in all you should have 4 spark plug wires, 2 that attach directly underneath the 2 coils, then 2 regular type wires that run to the other spark plugs. If you look at the valve cover and see the wires, you will see what i am saying better. Just don't forget to ask the autoparts store the spark plug gap recommended for you car, and adjust the gap on the plugs as needed. good luck.
Bren H.

Posted on Oct 13, 2008

  • 231 Answers

SOURCE: 2001 GMC Sonoma Engine stopped while driving

sounds like it could be plugged injectors or a timing problem.

Posted on Oct 27, 2008

  • 4 Answers

SOURCE: 2000 Chevy Tracker 4x4 2.0 liter engine

There are 4 small coild on the top of the motor, these are the ignition coils, 1 per spark plug. You have to pull the coils and the spark plugs are under them.

Posted on Nov 05, 2008

dnewcombe1
  • 1564 Answers

SOURCE: Replacing heater core in 2000 GMC sonoma. Dash is

If the dash is removed you've saved about 9 10ths of the job endurance. Look around, what you believe to be, the perimeter of the heater box. I cannot, and no one else can, tell you exactly where the bolts and nuts that mount the heater box are. Therefore you must viually sixe the box and check outide in the engine compartment and inside under the dash for the mounting bolts.You'll want to start by removing the heater hoses. Then starting at the passenger side engine compartment look for a group of 10mm or 7/16ths nuts retaining the housing and remove them. Do the same inside. The housing is usually held together with screws or clips, it changes year to year. Keep a log or pix of the wires and cables and hoses(vacuum) that are connected to the housing for reassembly. You'll need to "roll" the box out from under the dash depending on how much of the dash has been removed. The core is easy to spot for is has two hoses sticking out, and, is encircled with clips or screws . Also make sure you remove the bracket around the two entry hoses if it has one. Thank you, Dana

Posted on Oct 04, 2009

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