1999 silverado with black widow

I just purchased a 1999 chevy silverado with a black widow RS/alarm in it. I cannot identify the model # of the system there are no numbers other than FCC numbers on the unit. The issue I am having is trying to program multiple remotes I have two remotes and can switch from one to the other through system programing but it will not take the second remote. anyone really familiar with black widow?Plan Ahead

Try the following. It is from the black widow website its listed in the BW550 install manual. Unless there is a significant model change manufactures tend to keep programing steps similar to ease installation for authorised dealers. Adding Transmitters To add a new transmitter to the system have the desired transmitters ready and follow the Code Learning sequence. 1. Turn the ignition on, off, on, off and leave on. • The lights will flash 3 times. 2. Press the Valet switch. • The status LED will turn on red. • The lights will flash 5 times. 3. Press the Lock Button on the transmitter. • The lights will flash once. 4. Press Lock Button on the transmitter again. • The lights will flash twice. 5. Repeat steps 3 and 4 for each additional transmitter. 6. Turn off the ignition. • The lights will flash 3 times.

No joy I have tried that sequence as well as 4 times on and off but the system drops the first remote and stores the last??Plan Ahead

another note the system has spark sensePlan Ahead

the wires on the unit are like this R|R|BR|Y|ORANGE|VIOLET MAIN POWER\START WIRES Y|V|BLU|GRE|GRAY|ORANGE|BLACK|BR|R|WHITE MAIN CONTROL WIRES WHITE|RED|BLK MINI PLUG HORN|DOME MINI PLUG NOT WIRED BLK|BLK MINI PLUG SWITCH RED|RED / BLK MINI PLUG LED GR/BLK|ORG|YELLOW MINI PLUG TRUNK,FACTORY DISABLE,VACCUM GREEN|RED|BLUE MINI PLUG LOCK,+12V,UN LOCK WHITE|BLK|PURPLE|RED MINI PLUG GRD,DUAL STAGE,SHOCK ??? THE UNIT SEEMS TO BE OF RECENT DESIGN BUT THE BLACK WIDOW STATES "SEE DEALER FOR REMOTE REPLACEMENT" UNFORTUNATLY THERE IS NO DEALER AROUND MY AREA Plan Ahead

After your program the replacement can you then program the second remote? Or does it keep dropping the previous remote? Some units delete all previous remotes when you program a new one to prevent someone from programming a remote without the owner.

it accepts the last remote only although all programing i have read on the web sight says 2 to 4 remotes depending on model.Plan Ahead

any more advice im at a real lossPlan Ahead