GMC Repair: 1999 chevy suburban AIR pump, chevy suburban, storage box

Question
where is the secondary air pump located on a 1999 suburban 1500.

Answer
Hi
IF your vehicle is equipped with this, it would be located in the left front underhood. It would mount where the spare battery would go, or where the underhood storage box is (if equipped).
You'd know you'll have it, it is rather large and fits completely where the battery would go.
Hope this helps.
Good Luck
PAwl