I have a 2011 RCSB 5.3 6L80E 3.42.

I was on the freeway the other night and punched it, got up over 100 to about 105 and the engine light started blinking so I slowed down & it went away. Did it again about 10 mins later & it did the same thing, once slowed, it went away.

Has anyone had this problem before? I'm wondering if that's just what the new trucks do now when pushed over 100? I had a 2008 CCSB 5.3 4L60E 3.73 before and would top it out at about 125 atleast every other day with no problems. Any insight on this problem is appreciated, thanks.

-Patrick-

 

Check the codes. My truck used to do it also and it was a maf performance code.

 

That is probably the "your driveshaft is about to explode, slow down" light.

 

Lol, ive had mine at 135mph lots of times. Still spinnin

 

I have only had mine over 100 once or twice. The stories on here have me worried enough that I don't want to try it too often without having a backup.

 

one or 2 piece shaft?

 

1 piece, steel.

 

A RCSB with tall 3.42 gears should be okay at those speeds. I have had my ECSB (longer alum shaft) to 130 mph with 3.73 gears when I felt a "change". I promptly slowed down.

 

Not sure on the light, but I have had mine 140, still felt ok. I felt no need to keep my foot on the loud pedal any longer..

 

I wonder how Flaco's truck feels... I'm pretty sure he's had Lil' Sis up to 180.