I play the C as a C/G and the G as a technically a G6add11 below in the diagram. Play the Fmaj7 in the verses and chorus with your thumb on the bass note (see chord diagram). 
C/GGAmFadd9Fmaj7Am/B e|---0----0----0----3-------0-----0-|
b|---1----1----1----1-------1-----1-| Fadd9 (only strum last 4 strings) 
Fmaj7C Driving through the streets tonight
GAm It's hot I've got the windows down
Fmaj7CG I wish I could call you I wish you were still around
Fmaj7C Nothing much left in the tank
GAm Somehow this thing still drives
Fmaj7CG It forgot what it needed but somehow still survives
AmAm/BCFmaj7G And all the walls we built they must come down
Fmaj7 Hey, You're my wrecking ball
CGFmaj7 won't you come and maybe knock me down
Fmaj7 Hey, You're my wrecking ball
CGFmaj7 won't you come and maybe knock me down
Fmaj7 Hey, You're my wrecking ball
CG won't you come and knock me down,
CFmaj7 come and knock me down,
CGFadd9 (hold) come and knock me down tonight
Fmaj7C Lying in the bed at night
GAm Feeling like I'm somebody else
Fmaj7CG My thoughts inside my head get lost inside the haunted house
Fmaj7C Everyone I used to know
GAm Left their dreams by the door
Fmaj7CG I accidentally kick em thats how I can tell you're still not sure
AmAm/BCFmaj7G And all the walls we built they rise and they fall
Fmaj7 Hey, You're my wrecking ball
CGFmaj7 wont you come and maybe knock me down,
Fmaj7 Hey, You're my wrecking ball
CGFmaj7 wont you come and maybe knock me down
Fmaj7 Hey, You're my wrecking ball
CGFmaj7 wont you come and maybe knock me down
Fmaj7 Hey, You're my wrecking ball
CG wont you come and knock me down
CFmaj7 come and knock me down,
CGFmaj7 come and knock me down tonight
CG come and knock me down
CFmaj7 come and knock me down,
CGFmaj7 come and knock me down tonight
CG come and knock me down,
CFmaj7 come and knock me down,
CGFmaj7 come and knock me down tonight
CG come and knock me down,
CFmaj7 come and knock me down,
CGFmaj7 come and knock me down tonight
Fmaj7C Driving through the streets tonight
GAm Its hot Ive got the windows down
FCG I wish I could call you I wish you were still around
 End on G chord riff, listen to the song for pattern: