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  1. Accessing rear spark plugs - 2011 RTS

    1G Problems & Issues
    I've searched the forums for an answer on changing the rear (near firewall) spark plugs (I think numbered 1-3). I can see the front 3 closest to the radiator/front of truck. I can't even see the back 3. Is there a trick or suggestion on how to best change those? Use a mirror? From underneath...