Wheel balancing or alignment? Asymmetrically worn tires? Front end damage leading to imbalance?
running out of gas??
A 1999 Tahoe is probably around 12-15 city, 16-19 highway, if you use cruise control it'll help cause it maintains the RPMs and help raise the mpg
The EPA range estimate for the 2001 Chevrolet Tahoe is 338 mi. in the city, 468 mi. on the highway.
The EPA range estimate for the 2002 Chevrolet Tahoe is 338 mi. in the city, 468 mi. on the highway.
The EPA range estimate for the 2008 Chevrolet Tahoe is 364.0 mi. in the city, 494.0 mi. on the highway.
The EPA range estimate for the 2010 Chevrolet Tahoe is 390.0 mi. in the city, 546.0 mi. on the highway.
The EPA range estimate for the 2013 Chevrolet Tahoe is 390.0 mi. in the city, 546.0 mi. on the highway.
The EPA range estimate for the 2011 Chevrolet Tahoe is 390.0 mi. in the city, 546.0 mi. on the highway.
The EPA range estimate for the 2005 Chevrolet Tahoe is 364 mi. in the city, 494 mi. on the highway.
The EPA range estimate for the 2003 Chevrolet Tahoe is 338 mi. in the city, 442 mi. on the highway.
The EPA range estimate for the 2009 Chevrolet Tahoe is 364.0 mi. in the city, 494.0 mi. on the highway.
The EPA range estimate for the 2006 Chevrolet Tahoe is 364 mi. in the city, 494 mi. on the highway.