Key fob problems/replacement

[Schwartzint1]

I have a 2011 Tahoe. The factory fob is lock/unlock and pop the rear glass open. A few years ago I had an aftermarket remote start added that works off of my factory fob. Lock three times and it starts. Lately my fob has not been working great. I figured it was the battery, so I purchased a brand new Duracell replacement. No improvement. The lock function works as does remote start, but it is very hard to get the unlock to work. I have to press the button several times and it hardly works. Is my fob just worn out? Also if I order a new fob will it work with my aftermarket remote start? Doesn’t sound like the 2011 fob can be programmed without a tech 2. Is that correct? Any info would be helpful. Looking at these as a little bit nicer replacement.
https://boostautoparts.com/products/fob?variant=13368373706807

 

[mainecrab]

I do have a keyfob programmer that might work for you as I do have a VXDIAG now. Though do not believe that year requires a Tech 2. Look online for programming instructions and or buy the key fob off Amazon and see if you can program it yourself.

 

[915_Tahoe]

Check the the soldering points on the battery holder to board. They tend to crack, a reaolder will get them working again.