Yes and No...regardless of motor on a 3 speed, it gets the same harness, you must use a 6.2 harness.
The other engine harness for the 6.5 is with a 4 speed, the harness has TPS and such capabilities in the harness.
So you would not use a 6.5 harness from an A2 truck on a v-belted 6.2 or 6.5.
So...
the harness 12339350 for the 6.2L is ALSO used for the v-belt earlier 6.5L NA engines?
There‘s some misinformation about this in the parts book/manual (I can only find ONE harness, one for 6.2L and the other for 6.5L NA) as well as on some of the larger parts sites like hummerpartsguy.
12446828 (6150-01-412-3192) is shown as being for 6.5L NA / 6.5L DETUNED.
If a 6.5L motor were installed in a truck formerly powered by a 6.2L NA both of them v-belt engines, would the first harness - 12339350 -work?
Could the second harness work?
Thanks.
Norm