2000 GMC sierra remote door locks

Anyone have experience with remote door locks on 2000 GMC sierra(assuming chevy would be the same). Mine only work about half the time. The other times they seem to hang about
half way through the cycle. Have changed batteries in the remote and that did not help.
Have looked at after market actuators, but don't see any specifically for the 2000 sierra. I had rather not go with a generic one.
Anyone have any ideas on repairs or a good source for replacement actuators?
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