2 Battery install help

[ctv_lara]

How to connect 2 batteries on 97 chevy suburban ..

[BEEMDUB]

take your positive on the first battery and connect it to the negative...and then take the 2nd battery and do the same thing then sit there and rev your car till it redlines and hold it there while singing livin la vida loca backwards........its either that or use the search button I can't remember

[ctv_lara]

Jaja..but i Mean do i need a relay isolator