Same as DaveB, For me July 2004, brand new SMB driving up the Grapevine on a 90+ degree day. I had no idea there was an aux fan. I pulled into the one rest stop thinking the engine was ready to blow! A special place in hell to the engineer who synchronized the go petal position to fan rpm (and increased noise).
2004 SMB 4x4 RB 6.0 PSD; ARP Head Studs, Gen 3 Cylinder Heads, BPD Oil Cooler connected to AMSOil Bypass, a whistling Wicked Wheel Turbo, Coolant Filter, Upgraded alternator, ScanGauge, SCT custom and SMB Fox shocks.
BFG 285/75 R16 KM3 Mud Terrains on ProComp 7069's