Could be part of this TSB, It includes the channels, which in your case may not be aligned properly.
Left/Right Door Window Inoperative (Replace Door Glass and Regulator, If Necessary) TECHNICAL SERVICE BULLETIN Reference Number(s): 04-08-64-022, Date of Issue: October 27, 2004 Related Ref Number(s): 04-08-64-022 ARTICLE BEGINNING SERVICE INFORMATION Service Information CONDITION Some customers may comment that the left or right door window is inoperative. CAUSE Poor adhesion of the sash channel to the glass may cause this condition. CORRECTION Replace the door glass. Do not attempt to reattach the sash channel to the glass. It may be necessary to replace the window regulator if damaged. Refer to Window Replacement-Front Door (SI Document ID #1318585) or Window Regulator Replacement-Front Door (SI Document ID #1311279). PARTS INFORMATION Parts Information Parts are currently available from GMSPO. Affected Model(s): 2004-2005 Chevrolet Colorado; 2004-2005 GMC Canyon Do This Do Not Do This Replace the door glass. Do not attempt to reattach the clip. Part Number Description 97247739 Window, Frt S/D (Incls Guides)-LH 97247738 Window, Frt S/D (Incls Guides)-RH 97247754 Regulator & Motor-RH 97247755 Regulator & Motor-LH 97247752 Regulator (Non Power)-RH 97247753 Regulator (Non Power)-LH Page 1 of 2 Left/Right Door Window Inoperative (Replace Door Glass and Regulator, If Necessary) -. 4/11/2009
Saturday, April 11th, 2009 AT 8:15 AM