The gas mileage is as follows;
SLE 4.2L gets up to 14 city and 20 Highway
SLT 4.2L Gets up to 14 city and 20 highway
Denali 5.3L gets up to 15 city and 21 highway
Seems odd that the V8 gets better mileage but it does not have to work as hard to get the Truck moving.
The noise is probably the fuel pump priming the fuel injection system. All vehicles do this and some are louder than others. It is not a problem. They all have stability control which is hydraulic and would prime as well and is not an issue, just a little noisy and it actually lets you know its working.
Average prices, it depends where you live;
Denali $12,500.0-$12,600.00 depending on options
Sunday, July 8th, 2012 AT 2:58 AM