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Old 07-31-2014, 11:43 AM   #1
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Join Date: Feb 2013
Location: Ottawa ON
Posts: 111
GM 8 speed, new Tow ratings

Got an email from announcing 2015 trucks will have new 8 speed transmission.

The 8-speed rumors are true: GM has announced that all 2015 6.2L Silverado, Sierra, Suburban, Tahoe & Yukon will come standard with a new Hydra-Matic 8L90 eight-speed

The 2015 Silverado and Sierra will have lower trailering ratings due to implementation of the SAE J2807 standard: We've got the new towing limits for the most popular 1500 pickup configurations


2009 Suburban LT 1500 - 4x4 - 3.42
2009 Flagstaff 23FBS Super Lite
Nights Camped in 2015 - 21
Nights Camped in 2014 - 29
Nights Camped in 2013 - 31
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Old 07-31-2014, 12:01 PM   #2
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Join Date: Aug 2011
Location: Iowa
Posts: 34,205
In most instances it's only few hundred of lbs.


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