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**crossy** · 02-18-2005, 06:50 AM

Frank, dats the facts- the 81-87 glass is indeed thinner. If you were to put the entire vent assembly from an 81-87 into a 73-80 door and assuming the window channel was almost new (NOT going to happen anymore) the thicker glass may encounter extra resistance. Ever notice that the after market only sells one channel to fit all years? with manual windows like most 73-80 have yul prolly never notice any difference,but with the power windows it may take a few days before the channel 'opens' wide.
FOR YEARS NOW- GM has only offered the newest style 90-91 as replacement, complete assemblies only and only in tinted. the 90-91 Blazer/Burb had more rubber that sealed to the outer doorshell in an effort to stop the nasty wind whistles. the last time I bought a whole assembly from GM they were about $135 ea. and that was 8-10 years ago.

CB- I owned at least two 1981's and other than the obvious sheetmetal differences from 1980 GM carried a lot of the 73-80 suspension & general hardware pieces. Never assume with an 81. I KNOW that my one SWB 81 had an 80 down frame that wasn't lightened up like the 82-87's. Not thickness wise but more the way of braces & brackets & such. both mine also had the thicker brake rotors. DAVE

02-18-2005, 06:50 AM	#10
crossy Oh,you can't buy that new Join Date: Apr 2000 Location: Pennsville,N.J. 08070, USA Posts: 2,042	Frank, dats the facts- the 81-87 glass is indeed thinner. If you were to put the entire vent assembly from an 81-87 into a 73-80 door and assuming the window channel was almost new (NOT going to happen anymore) the thicker glass may encounter extra resistance. Ever notice that the after market only sells one channel to fit all years? with manual windows like most 73-80 have yul prolly never notice any difference,but with the power windows it may take a few days before the channel 'opens' wide. FOR YEARS NOW- GM has only offered the newest style 90-91 as replacement, complete assemblies only and only in tinted. the 90-91 Blazer/Burb had more rubber that sealed to the outer doorshell in an effort to stop the nasty wind whistles. the last time I bought a whole assembly from GM they were about $135 ea. and that was 8-10 years ago. CB- I owned at least two 1981's and other than the obvious sheetmetal differences from 1980 GM carried a lot of the 73-80 suspension & general hardware pieces. Never assume with an 81. I KNOW that my one SWB 81 had an 80 down frame that wasn't lightened up like the 82-87's. Not thickness wise but more the way of braces & brackets & such. both mine also had the thicker brake rotors. DAVE __________________ "been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone 73 Pinto, stock, w/CragarSS's-eww 84,C10 SWB-Yella,stock 86 K10 SWB-Red, hopped up 305,4/S LOTS of Cummins trucks.