2000 suburban keyless entry

Your guess is good as mine. These are the issue that drive most tech people crazy. Probably worth looking into an aftermarket keyless unit if the problem persist. DIRECTWIRE™ WIRING INFORMATION - CHEVROLET / SUBURBAN / 2000 / Keyless Entry 12volts red   +   ignition harness Starter yellow   +   ignition harness Ignition pink   +   ignition harness Power Lock lt. blue   +   pin A4, brown plug at BCM Notes: The BCM (Body Control Module) is located behind the driver side of the dash. The plugs face towards the rear of the vehicle. Power Unlock white   +   pin A3, brown plug at BCM Notes: The BCM (Body Control Module) is located behind the driver side of the dash. The plugs face towards the rear of the vehicle. Lock Motor gray   5wi driver kick, door harness Unlock Motor tan   5wi driver kick, door harness Parking Lights+ brown   +   pin B6, lt. blue plug at BCM Notes: The BCM (Body Control Module) is located behind the driver side of the dash. The plugs face towards the rear of the vehicle. Parking Lights- white   -   pin A5, lt. blue plug at BCM Notes: The BCM (Body Control Module) is located behind the driver side of the dash. The plugs face towards the rear of the vehicle. Hazards same as turn signals        Turn Signal(L) lt. blue   +   steering column Turn Signal(R) dk. blue   +   steering column Door Trigger     -   BCM Notes: Use tan for the driver door located in pin B4 of the purple plug, and the passenger doors are a blue/white in pin B11 of the lt. blue plug. Use both wires and diode isolate each. The BCM (Body Control Module) is located behind the driver side of the dash. The plugs face towards the rear of the vehicle. Dome Supervision use door trigger        Trunk/Hatch Release N/A        Power Sliding Door N/A        Factory Alarm Arm arms on lock        Factory Alarm Disarm lt. green   -   pin B3, purple plug at BCM Notes: The BCM (Body Control Module) is located behind the driver side of the dash. The plugs face towards the rear of the vehicle. Disarm No Unlock see factory alarm disarm        Horn Trigger black   -   pin A9, brown plug at BCM Notes: The BCM (Body Control Module) is located behind the driver side of the dash. The plugs face towards the rear of the vehicle. Memory Seat 1 white   +   memory mod under dr seat Memory Seat 2 purple   +   memory mod under dr seat Memory Seat 3 N/A   +      Interface Module: Category: Immobilizer Bypass Required: Yes Type: Passlock II Part #: 556LW Alternate Part1 #: 555LW Alternate Part2 #: 555T Notes: Interface Module: Category: Door Lock Interface Required: No Type: N/A Part #: N/A Notes: Interface Module: Category: Combo Interface Required: Yes Type: Data Bus Part #: 457GW Notes: Can use the 457GW to bypass the Passlock II, but it will not control the door locks on this model year.        This wiring information is being provided free of charge on an "as is" basis, without any representation or warranty. It is your responsibility to verify any circuit before interfacing with it using a digital multimeter. Directed electronics, Inc. assumes no responsibility with regards to the accuracy or currency of this information. Proper installation in every case is and remains the responsibility of the installer. DEI assumes no liability or responsibility resulting from improper installation, even in reliance upon this information. Be careful whose advice you buy, but be patient with those who supply it.