I copied this from a coloradofans.com post.

Source ALLDATA

Campaign - Engine Cooling Fan Replacement
Subject:
Product Enhancement for Inventory and Customer Vehicles - Engine Cooling Fan Noise - Expires with Base Warranty
# 06157 - (10/10/2006)

Models:
2007 Chevrolet Colorado
2007 GMC Canyon
2007 HUMMER H3

THIS PRODUCT ENHANCEMENT INCLUDES VEHICLES IN DEALER INVENTORY AND CUSTOMER VEHICLES THAT RETURN FOR ANY TYPE OF SERVICE, AND WILL EXPIRE AT THE END OF THE INVOLVED VEHICLE'S NEW VEHICLE LIMITED WARRANTY PERIOD.

Purpose

This bulletin provides a service procedure to remove the seven-blade engine cooling fan and install an eight-blade fan on certain 2007 Chevrolet Colorado, GMC Canyon, and HUMMER H3 vehicles. The seven-blade fan on these vehicles may cause excessive noise.

This service procedure should be completed as soon as possible on involved vehicles currently in dealer inventory and customer vehicles that return to the dealer for any type of service during the New Vehicle Limited Warranty coverage period, at which time this bulletin will expire.

Vehicles Involved

Table would not paste but Vins in certain rage and the dealer check via
GMVIS

 

I was hoping to see some news on electric fans