Hell yeah.
Check this out...
I just now replaced the spark plug wires, cap, rotor, etc on the Tahoe at 152K! Come to find out the misfire I was chasing was only a worn out distributor gear. I could have left those ORIGINAL wires, cap, and rotor on that badboy.
The Z71 still has original plug wires and injectors at that mileage too.
They both run real strong.
I figure if they are paid for, why not keep em. I'm not gonna get anything for em anyways. Drive em till they die!