2019 GMC Sierra Crew Base, 5.3, 6 Speed, X31 with towing package, 8,000km. Truck drivetrain and such have been great. Other stuff not so much... I do have the dreaded infotainment issues that it seems like every one has. On the second head unit already, dealer seems at a loss to fix, it is very frustrating when you drive in northern Canada and the whole system locks up. But yesterday a new one - it got cold (for Vancouver, BC, Canada) -5 Celsius and snowed about 15 cm overnight. In the morning, I started up the truck, cleared off snow, drove to nearest starbucks then had to take a call (and CarPlay actually worked) so I sat there with it running for about 5 minutes. Then I shut her off and went to exit. I could hear a switch cycling under the dash like 20 times after I shut it down (weird). Then I tried the door handle and the door was locked and would not open. So i hit the unlock button - nothing happened - no noise, no unlock, no nothing. So i tried it again - lock/unlock and nothing happened then the door handle - nothing! I said to myself - that is weird and a little concerning. So i tried like ten more times. Nothing. Door locked and would not open, no matter what I tried. I stopped to collect myself - I thought (like the infotainment) I will start it back up and see if that works - nope. I shut it back down - same thing. So now after 2 or 3 minutes - I am like hmmm... what if i NEEDED to get out. Concerning. Windows had some residual ice/snow so I could not open them. I re-started again and maxed out the defrost for another 5 mins until the windows were freed up to open then I reached out and opened the door from the outside. Door opened immediately. I am going to call dealer - but I thought I would see what the forums thought as well.
Nice truck. This is the same set up I have - same level, same size and same brand tires on same factory wheels... On a black z71 LTZ crew! So good taste my friend. I get a lot of comments on mine. Little rub that was fixed with ties and small trim of liner. No worries there as I only do light offroad excursions. A couple of differences - I put on factory steps because I have young kids who need steps to climb in. I also just put on a canopy and added a full bed rug. No exhaust changes. After thousand kilometres with new tires, I used the hypertech tuner to adjust for tire size and firm up shifts... Improved fuel mileage by about 8-10% with this. everything just works better - shift points, cylinder shut down and rpms at highway speeds are working more like factory. I will post a few pics this weekend once it is clean. Nice truck. This is the same set up I have - same level, same size and same brand tires on same factory wheels... On a black z71 LTZ crew! So good taste my friend. I get a lot of comments on mine. Little rub that was fixed with ties and small trim of liner. No worries there as I only do light offroad excursions. A couple of differences - I put on factory steps because I have young kids who need steps to climb in. I also just put on a canopy and added a full bed rug. No exhaust changes. After thousand kilometres with new tires, I used the hypertech tuner to adjust for tire size and firm up shifts... Improved fuel mileage by about 8-10% with this. everything just works better - shift points, cylinder shut down and rpms at highway speeds are working more like factory. I will post a few pics this weekend once it is clean.
Thanks for the respomses! My father-in-law heard me talking about this... He wanted to get me xmas present still so long story short, I have a new max energy power programmer from hypertech! I will report back on impacts when I correct for tire size and make other adjustments using it. It will be late this weekend before I get a chance. Another note - on the 600 km return trip on Sunday got down to 14.8 litres/100 km (15.9 mpg US) (19.0 mpg imperial) this was in "auto" 4x4 mode in a blinding snow storm for the first 300 kms.
Ok - just did the level and went with 295/60-20 Nitto Terra Grapplers on my '14 crew cab with 5.3 and 3.42 gears. I understand all the comments posted to date. I was expecting some loss of mileage but I was wondering if any of you felt like the shift points and cylinder shut off were off -- post lift. Pre-lift - the truck shifted very quickly to top gear and went to V4 mode any time I lifted off the throttle. Post-lift - just drove it 600 kms and it felt like it was hesitating to go into top gear and only went into V4 mode on steep downhills with no throttle applied. Throttle response still great. At end of trip my rate was 16.0 litres/100km (17.65 miles per imperial gallon or 14.7 miles per US). Not bad but I think that if I got this issue cleared I would improve by at least 10 percent. This calculation does not include the difference for new tire diameter so mileage might even be 4 or 5 percent better than these numbers - these were based on truck calcs only. Comments - I am thinking the hypertech might be the answer. A final note - i had '11 ram crew hemi 5 speed auto with level and same tires. It got better mileage than this post lift. Surely this truck can out do that.
New to Forum so beg pardon if I have not posted this perfectly. 2014 Chev Silverado LTZ Z71 Crew Cab 4x4 Black, 5.3, 3.42. WTB - Want to buy 2014 or 2015 - factory stainless side steps - factory mudflaps front and rear Looking for someone from Pacific Northwest or AB/BC Canada to work something out with as I am in Vancouver BC
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