98 K3500?

[Wing Nut OOA]

my brothers truck is a 454 but its down right now and i was wondering if he can pull codes the same as on my 95.

i know his is OBDII so i couldnt remember if you could do it without a scantool.

[DmaxMaverick]

Nope. You need a scan tool to communicate with an OBDII ECM.