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**aotte1** · 11-28-2017, 02:15 AM

Discussed these issues with very knowledgeable person on GM trucks, and he has same option on this 2017 power train. He has driven the 2017.
I am now hoping, GM will write new control program for trans and engine.

A good thing is it can gets crazy good mileage on the highway, high for Z71 is 26.2mpg and High Country is 25.2 mpg. Even at plus 70 going up and down hills with load in bed 21mpg. Going up mountain On I64 in West Virginia the Z71with around 1500 lbs. in truck it got around 19 mpg. Their are several good things on these trucks, however, powertrain is not one of them, except for mpg on highway.

The bad thing is not knowing which gear it wants to be in, loud clunking sometime when it shifts, converter slippage on starting from stop and down shifting at WOT or 3/4.
The truck does not accelerate well under WOT or 3/4. Has very little towing power.

The rated HP/Torque is not showing up, for some reason. With this much SAE rated HP it should accelerate pretty quick, it does not. With E85 fuel this is supposed to make 395 to 400 HP per GM Powertrain Division documents on the web.

Option, in may ways, for very technical/knowledgeable person, it is not fun to drive.

11-28-2017, 02:15 AM	#6
aotte1 Senior Member Join Date: Oct 2013 Location: lousiville Ky Posts: 2,637	Re: 2017 1500 High Country Discussed these issues with very knowledgeable person on GM trucks, and he has same option on this 2017 power train. He has driven the 2017. I am now hoping, GM will write new control program for trans and engine. A good thing is it can gets crazy good mileage on the highway, high for Z71 is 26.2mpg and High Country is 25.2 mpg. Even at plus 70 going up and down hills with load in bed 21mpg. Going up mountain On I64 in West Virginia the Z71with around 1500 lbs. in truck it got around 19 mpg. Their are several good things on these trucks, however, powertrain is not one of them, except for mpg on highway. The bad thing is not knowing which gear it wants to be in, loud clunking sometime when it shifts, converter slippage on starting from stop and down shifting at WOT or 3/4. The truck does not accelerate well under WOT or 3/4. Has very little towing power. The rated HP/Torque is not showing up, for some reason. With this much SAE rated HP it should accelerate pretty quick, it does not. With E85 fuel this is supposed to make 395 to 400 HP per GM Powertrain Division documents on the web. Option, in may ways, for very technical/knowledgeable person, it is not fun to drive. Last edited by aotte1; 11-28-2017 at 02:53 AM.