rear lift gate will not lift.actuiator tries I can open manual.i think bushing on 2007 Chevrolet Suburban 1500

may be bad. Hate to buy full assem for bad bushing??

Asked by for the 2007 Chevrolet Suburban 1500
GM sells a repair kit for this condition, a service bullitin was issued with the kit number, check with your local Chevy dealer.
How do I find bullitin dealer no help?