1990 Chevy suburban 4x4 2500 questions where can i get factory stock specs? and more?

[Branden]

i have a 1990 4x4 suburban with manual lockers in front i was wondering if anyone knew did this year come with posi front and rear i assume if the front has lockers that means the fronts posi it wouldnt make sense the rear would be open differential but i cant find facts on this vehicle anywhere
i put new heads and holley flowtech headers to start up grades
its a 350 throttle body injection

anyone who knows alot about this vehicle hit me back
thanks
Wiki doesnt work and the hubs are manual locking free to lock makes sense ur locking it in 4wheel and locking hub? Limited slip is shit i hope i dont have it

 

[Mr. Wizard]

Also, you can access Chilton manuals on the Autozone website

 

[Big_Ugly]

unless somebody installed lockers or a gov-lok it is an open diff..... manual locking hubs got nothing to do with the carrier.