Originally Posted by REW
You indicated that the Dealer fixed your brake issue on your truck.
Do you know what was done to your vehicle to remedy the problem?
If, as you said - it was a brake booster vacuum issue - how was the brake booster vacuum changed?
REW, I was only told that indeed there was an issue with the brakes which involved the vacuum and the updated the software. Dealer admitted this was a common problem they were seeing and handled it very well. The brakes are great now.
Just an interesting comment to add, in June I drove my 2018 GMC 1500 XLT with a trailer package (large mirrors, brake controller, beefed up rear springs, 6.2L engine) from Minneapolis to Sioux Lookout and back. Took 169 to 6 to 71 on the way to International Falls and come down 53/35 on the way back. For the entire trip, not pulling a boat, just our gear, I averaged over 25 MPG for the 1000 mile round trip. It has a setting of the best mileage for 25, 50, and 400 miles. The best for the 25 mile time period was 30.7, the 50 was 28.5 and the 400 is 25.5. This was on regular 87 octane, E10.