So I have a 09 Silverado z71 and a couple months ago the passenger side door lock has started acting weird sometimes it would work and sometimes it wont its off and on. What could be the problem the lock solenoid? and how much of a task is it to swap that out. Thanks, ricky

 

Door lock actuator. If u can take the door panel off, u can replace it.

 

if you catch it at a time its not working its easier to test and narrow down to the actuator
but 9/10 times it is that so you can more then likely replace the actuator without worries!

 

I checked out rock auto and this is what I found is this the right thing I need? Its like 78 bucks. This is the part # DORMAN 931301

 

ya thatd be the part
however what I find strange is when I enter 09 silverado and search the sub columns...I cant seem to find the actuator, so where did you find that part number?

 

lots of info here, looks to be very common and you can use a cheap actuator
2008 Silverado Power Door Lock Actuator Failed - Page 18 - Silverado & Sierra 1500 - GM-Trucks.com - Page 18

 

Autot3k- it was under body exterior door lock actuator. But I think that part number is for the drivers door so I ordered one off ebay for $80.

 

Thanks for the help guys! Got this fixed today, took me about 45 min. Also fixed the p0449 cel, think its like the evap canister or some crap, truck is like new again.

 

its definitely an easy job to do and glad it fixed your problem!
how did you fix the p0449? or just coincidentally it went off after you were done?

 

I swapped out that canister in front of the fuel tank and that tube that runs over the trans. I ran it up under the hood by the brake booster so hopefully that's a permanent fix. That cel has been on for over a year now it feels weird to not see it there anymore lol