Solving Deceleration on an Inclined Road

[iRaid]

Quick PLEASE help :(

Homework Statement

A car can decelerate at -4.80 m/s² without skidding when coming to rest on a level road. What would its deceleration be if the road were inclined at 13$$\circ$$ uphill? Assume the same static friction coefficient.

Homework Equations

F_f=$$\mu$$_SF_N

The Attempt at a Solution

Well I can't find anyway to even start can someone head me in the right direction?

 

[iRaid]

I think I got some of it:
$$\Sigma$$F=ma
F_f+F_N-F_g-F_p=ma
F_f+F_N-ma-F_p=ma
+ma both sides and +F_p
F_f+F_N=2ma+F_p
$$\mu$$_sF_N+F_N=2ma+F_pNow I'm wondering if there is actually Fp for the car or not (force of push). Would there still be a pushing force of the car when decelerating?
Stuck there now :\