I have an 03 GMC 2500HD and want to put extendable electric mirrors on it. It has electric adjustment mirrors now. I do not have memory system (at least no 1--2 buttons on the doors). The Orignial mirrors have 5 wires exiting the mirrors. The new, larger, extendable mirrors have three. They do work---Question---Is there going to be feed-back into the system that may do damage, or am I OK to use the new three wire mirrors? The mirrors are CIPA #70200. To clarifiy - the mirrors extend manually and adjust electric. I don't want to fry the system.