help...newbie mistake! broke electrical connector.
 

I have a 2001 Silverado ext cab/ 6 cyl 4.3l...My fuel pump gave out so I removed the bed and replaced the pump...problem is I broke off two connectors under the bed by the spare tire when removing the bed. There are four connectors leading to the juction, 2 grey connectors, one blue and I think the other is red or brown. I removed the 2 grey connector but accidently busted the other two straight off the connector on the harness. Anyone have any idea what the blue connector and the red connector go to? How hard will it be to reconnect the connectors to the wire harness they broke off of? will I have to buy and replace the whole harness? Any advice is much appreciated in advance. what are those connectors called? been looking for the on the internet but no luck so far.

Thanks again!

Looking at my 2004 manual it show the junction block to have 4 connectors C1 has 8pins is Blue, C2 has 7 pins is mid-gray, C3 has 8 pins is Brown and C4 has 7 pins is Black. A quick glance shows mostly the rear lamps ie: tail, stop license, clearance etc.
C1- connects to ground. C2 connects to left rear lights. C3 connects to license plate and clearance lights. C4 coneccts to right rear lights. The junction block is referred to as junction block rear lamps.

C1 P/N 15305595, is 8-way F Global Tech. 280 series Blu.
C2 P/N 15305596, is 7-way F Gobal Tech. 280 series Gry
C3 P/N 15305599, is 8-way F Global Tech. 280 series Brn
C4 P/N 15305597, is 7-way F Global Tech. 280 series Blk

You should be able to look up Global Tech. The P/N I assume are GM and maybe Global Tech too.