Tahoe Barn Door Lock Not Working

When tahoe parked outside depending on what side of vehicle is being hit by the sun the back doors will not unlock with key fob or door lock buttons.
Tahoe barn door lock not working. Greetings all i have bought a new 2008 chevy tahoe ltz a year back and now i am having problem with the door locks. On 99 tahoe the automatic locks are not working. 1995 tahoe with barn doors. The rear barn door does t work as well.
We show how to tell if you have a wiring is. It has power locks and a alarm system. When i try to lock unlock doors using the alarm system remote key some door do not open and sometimes do not lock when i try to lock doors. The most recently reported issues are listed below.
The rear doors and the back hatch will not lock with the power locks. Replacement part 88981030 green n clip was used because original white clip was not available. Have to manually unlock door from inside. I put in a new lock switch and a lock acuator.
If i lock the rear doors manually they will unlock. It does not mater if i am using the remote or if. Power locks not receiving signal from door switch or remote. 1999 tahoe 4 door 4x4 the driver passenger side power door locks are intermittently or not working at all.
It only happens to back doors and whenever it is hot outside in phx is all the time. Checked all wires no cracks. Left rear door lock rod clip broke when door was slammed too hard. The auto door locks function only when the weather is cool and then only once after that you have to wait an hour or so.
Can open and lock doors and barn door answered by a verified chevy mechanic. The drivers side pdl never responds when the switch is used and the passenger occasinally works. Chevrolet tahoe owners have reported 5 problems related to power door locks not working under the electrical system category. I have a 1999 tahoe 2 door 4wd with rear barn doors.
I have a 2003 chevy suburban 66 000 miles.