Electric Fan Conversion Question

[RTLINGR2]

I’m in the process of electric fan conversion on my 03 Tahoe. I pulled the factory harness off my 05 Yukon. From what I can tell, I have thick blue/black and yellow/grey wires going to fans. Red for power. The 2 small wires blue and green go to PCM pins.

Question is, where is the black ground wire that bolts to frame? I never saw one as I was removing this.

Any thoughts would be appreciated!

The factory fan harness grounds the fans on the frame rail behind the driver side front bumper.

 

[Matthew Jeschke]

Where did you source your fans from? I'm looking at RockAuto and they don't seem to have a OEM fan assembly. My plan is to buy part from 2005 1500 Silverado catalog for my 2001 Tahoe... Unless there's a better part to spec.

 

[Tonyrodz]

Where did you source your fans from? I'm looking at RockAuto and they don't seem to have a OEM fan assembly. My plan is to buy part from 2005 1500 Silverado catalog for my 2001 Tahoe... Unless there's a better part to spec.

View attachment 442711

I've read the newer model fans are better as they have more blades for cooling. K5L maybe? Pretty sure @Doubeleive has alot of knowledge on this subject.

 

[Doubeleive]

I've read the newer model fans are better as they have more blades for cooling. K5L maybe? Pretty sure @Doubeleive has alot of knowledge on this subject.

700w motors on the k5l vs 500w on the standard, fan blades vary.

 

[dps01]

These are the fan motors for K5L (Enhanced Cooling Package).

GM 15-81697 (Right)(700w; 5 bladed fan)
GM 15-81696 (Left)(700w; 5 bladed fan)