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Message: <blockquote data-quote="stutaeng" data-source="post: 20900" data-attributes="member: 6175">No, everything was basically plug-and-play. I did make a mistake when I powered it, because I left my V6 fuseblock. I damaged my cluster and BCM. I swapped to the V8 fuseblock and everything worked. I replaced the cluster (found one with the transmission temperature gauge) and a BCM from the junkyard. Everything worked again. The only thing that doesn't work is the cruise control indicator light on the cluster, although the pedal still works. I think there was a single wire on the fuse block that needs repining when they changed from 99 to 00 IIRC. On the motor mounts, I believe the driver's side you'll need one from a 99-02 RWD. My engine came from an 04 Yukon XL and that side motor mount was different. I think it has to do with the torsion bar front suspension on those vehicles.If your ECU is the metal-looking 0411 style, you can just get that reflashed. I had the old "black box" older carryover ECU so I had to replace it.I got a new AC compressor and dryer, etc. kit from RA and my mechanic installed it and charged it, and AC works like it should.Basically, I'm super happy with the truck... <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite6" alt=":cool:" title="Cool    :cool:" loading="lazy" data-shortname=":cool:" /></blockquote>