Join Date: Nov 2014
Location: Calgary, Canada
Resistor replaced with push on sockets rather than connector
Started with only position 4 working on the heater. In reading through this thread, I decided to replace the resistor, even though the original probably still works... as at least one pin was severely burned, and I thought would start fresh. Used 4 blue 1/8 inch crimp push-on spring separate sockets, as suggested earlier, rather than a new aftermarket g.m. socket that was available over the counter here, which appeared to be no better than the original. The push on sockets took considerable force with a pair of needle nose pliers to install...so they appear to make very good contact. Red sockets were too small for the wires... must be (blue) ones sized for 16/14 wire. I still wonder if I should have soldered them as well as crimping.
Net result... all speeds of the heater now work.
Note: Glove box came out easily with 3 -7 mm bolts on front below the box, Resistor has two 5.5mm bolts. Whole fix took only a few minutes. A second trip to the parts store for the right size socket connectors took longer.
Thanks to everyone for all the information on this forum thread. Alan
2004 Colorado 4x4 LS Ext cab.